/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-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:07:13,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:07:13,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:07:13,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:07:13,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:07:13,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:07:13,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:07:13,408 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 16:07:13,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:07:13,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:07:13,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:07:13,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:07:13,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:07:13,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:07:13,431 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:07:13,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:07:13,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:07:13,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:07:13,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:07:13,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:07:13,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:07:13,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:07:13,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:07:13,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:07:13,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:07:13,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:07:13,434 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:07:13,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:07:13,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:07:13,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:07:13,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:07:13,703 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:07:13,704 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:07:13,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-06-05 16:07:13,705 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-06-05 16:07:13,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:07:13,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:07:13,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:07:13,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:07:13,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:07:13,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:07:13,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:07:13,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:07:13,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:07:13,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/1) ... [2021-06-05 16:07:13,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:07:13,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:07:13,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:07:13,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:07:13,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (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 16:07:13,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:07:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:07:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:07:13,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:07:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:07:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:07:13,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:07:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:07:13,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:07:13,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:07:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:07:13,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:07:13,838 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 16:07:14,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:07:14,009 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:07:14,010 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:07:14 BoogieIcfgContainer [2021-06-05 16:07:14,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:07:14,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:07:14,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:07:14,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:07:14,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:07:13" (1/2) ... [2021-06-05 16:07:14,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8da52a and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:07:14, skipping insertion in model container [2021-06-05 16:07:14,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:07:14" (2/2) ... [2021-06-05 16:07:14,015 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-06-05 16:07:14,033 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:07:14,033 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:07:14,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:07:14,034 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:07:14,097 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:07:14,111 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:07:14,137 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:07:14,137 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:07:14,137 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:07:14,137 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:07:14,137 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:07:14,137 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:07:14,137 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:07:14,137 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:07:14,143 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2021-06-05 16:07:14,157 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 16:07:14,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 16:07:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 16:07:14,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:14,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:14,165 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash -221348590, now seen corresponding path program 1 times [2021-06-05 16:07:14,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:14,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673126122] [2021-06-05 16:07:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:14,356 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 16:07:14,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:14,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673126122] [2021-06-05 16:07:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673126122] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:14,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:14,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 16:07:14,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329103133] [2021-06-05 16:07:14,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:07:14,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:07:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:07:14,374 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 2.8363636363636364) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:14,412 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2021-06-05 16:07:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:07:14,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 16:07:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:14,426 INFO L225 Difference]: With dead ends: 215 [2021-06-05 16:07:14,426 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 16:07:14,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:07:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 16:07:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2021-06-05 16:07:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 16:07:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2021-06-05 16:07:14,479 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2021-06-05 16:07:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:14,480 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2021-06-05 16:07:14,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2021-06-05 16:07:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:14,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:14,484 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 16:07:14,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:07:14,484 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash -502535438, now seen corresponding path program 1 times [2021-06-05 16:07:14,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:14,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886193246] [2021-06-05 16:07:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:14,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886193246] [2021-06-05 16:07:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886193246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928079261] [2021-06-05 16:07:14,537 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 16:07:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 16:07:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:14,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928079261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:14,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:14,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 16:07:14,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547049190] [2021-06-05 16:07:14,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:14,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:14,653 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 16:07:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:14,718 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2021-06-05 16:07:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 16:07:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:14,726 INFO L225 Difference]: With dead ends: 345 [2021-06-05 16:07:14,726 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 16:07:14,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 16:07:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2021-06-05 16:07:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 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 16:07:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2021-06-05 16:07:14,763 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2021-06-05 16:07:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:14,763 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2021-06-05 16:07:14,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 16:07:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2021-06-05 16:07:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:14,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:14,764 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 16:07:14,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 16:07:14,965 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash -443832396, now seen corresponding path program 1 times [2021-06-05 16:07:14,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:14,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221651777] [2021-06-05 16:07:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:14,990 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 16:07:14,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:14,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221651777] [2021-06-05 16:07:14,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221651777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:14,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:14,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:07:14,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158818724] [2021-06-05 16:07:14,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:07:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:07:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:14,994 INFO L87 Difference]: Start difference. First operand 174 states and 511 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 16:07:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,030 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2021-06-05 16:07:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:07:15,034 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 16:07:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,036 INFO L225 Difference]: With dead ends: 242 [2021-06-05 16:07:15,036 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 16:07:15,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 16:07:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2021-06-05 16:07:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 16:07:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2021-06-05 16:07:15,050 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2021-06-05 16:07:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,051 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2021-06-05 16:07:15,051 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 16:07:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2021-06-05 16:07:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,052 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 16:07:15,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:07:15,052 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1106549168, now seen corresponding path program 1 times [2021-06-05 16:07:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675165929] [2021-06-05 16:07:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,070 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 16:07:15,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675165929] [2021-06-05 16:07:15,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675165929] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:07:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23433355] [2021-06-05 16:07:15,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:07:15,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:07:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,071 INFO L87 Difference]: Start difference. First operand 190 states and 537 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 16:07:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,109 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2021-06-05 16:07:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:07:15,109 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 16:07:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,110 INFO L225 Difference]: With dead ends: 325 [2021-06-05 16:07:15,110 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 16:07:15,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 16:07:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2021-06-05 16:07:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 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 16:07:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2021-06-05 16:07:15,120 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2021-06-05 16:07:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,120 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2021-06-05 16:07:15,120 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 16:07:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2021-06-05 16:07:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,122 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 16:07:15,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 16:07:15,122 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -471494800, now seen corresponding path program 2 times [2021-06-05 16:07:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084500541] [2021-06-05 16:07:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,164 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 16:07:15,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084500541] [2021-06-05 16:07:15,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084500541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:07:15,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412428150] [2021-06-05 16:07:15,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:07:15,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:07:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,167 INFO L87 Difference]: Start difference. First operand 235 states and 677 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,198 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2021-06-05 16:07:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:07:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,200 INFO L225 Difference]: With dead ends: 277 [2021-06-05 16:07:15,200 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 16:07:15,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 16:07:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-06-05 16:07:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 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 16:07:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2021-06-05 16:07:15,205 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2021-06-05 16:07:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,205 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2021-06-05 16:07:15,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2021-06-05 16:07:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,206 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 16:07:15,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 16:07:15,207 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 94645266, now seen corresponding path program 2 times [2021-06-05 16:07:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121016728] [2021-06-05 16:07:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,229 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 16:07:15,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121016728] [2021-06-05 16:07:15,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121016728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:07:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721529509] [2021-06-05 16:07:15,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:07:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:07:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,230 INFO L87 Difference]: Start difference. First operand 212 states and 598 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 16:07:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,263 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2021-06-05 16:07:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:07:15,263 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 16:07:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,264 INFO L225 Difference]: With dead ends: 275 [2021-06-05 16:07:15,264 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 16:07:15,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 16:07:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2021-06-05 16:07:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2021-06-05 16:07:15,272 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2021-06-05 16:07:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,273 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2021-06-05 16:07:15,273 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 16:07:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2021-06-05 16:07:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,273 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 16:07:15,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 16:07:15,274 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1521986286, now seen corresponding path program 3 times [2021-06-05 16:07:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153824384] [2021-06-05 16:07:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,298 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 16:07:15,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153824384] [2021-06-05 16:07:15,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153824384] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:07:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757090412] [2021-06-05 16:07:15,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:07:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:07:15,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,300 INFO L87 Difference]: Start difference. First operand 215 states and 610 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 16:07:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,319 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2021-06-05 16:07:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:07:15,320 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 16:07:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,321 INFO L225 Difference]: With dead ends: 222 [2021-06-05 16:07:15,321 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 16:07:15,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 16:07:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-06-05 16:07:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 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 16:07:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-06-05 16:07:15,325 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-06-05 16:07:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,325 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-06-05 16:07:15,325 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 16:07:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-06-05 16:07:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,326 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 16:07:15,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 16:07:15,326 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1597316976, now seen corresponding path program 4 times [2021-06-05 16:07:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968164407] [2021-06-05 16:07:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,343 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 16:07:15,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968164407] [2021-06-05 16:07:15,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968164407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:07:15,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80396929] [2021-06-05 16:07:15,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:07:15,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:07:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,344 INFO L87 Difference]: Start difference. First operand 213 states and 608 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 16:07:15,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,361 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2021-06-05 16:07:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:07:15,361 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 16:07:15,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,362 INFO L225 Difference]: With dead ends: 226 [2021-06-05 16:07:15,362 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 16:07:15,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:07:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 16:07:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-06-05 16:07:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 16:07:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-06-05 16:07:15,367 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2021-06-05 16:07:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,367 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-06-05 16:07:15,367 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 16:07:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-06-05 16:07:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:07:15,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,368 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 16:07:15,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 16:07:15,368 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1128775952, now seen corresponding path program 5 times [2021-06-05 16:07:15,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517707095] [2021-06-05 16:07:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,406 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 16:07:15,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517707095] [2021-06-05 16:07:15,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517707095] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:07:15,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:07:15,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:07:15,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041660100] [2021-06-05 16:07:15,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:07:15,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:07:15,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,407 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,430 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2021-06-05 16:07:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:07:15,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,431 INFO L225 Difference]: With dead ends: 212 [2021-06-05 16:07:15,431 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 16:07:15,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:07:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 16:07:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-06-05 16:07:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 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 16:07:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2021-06-05 16:07:15,436 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2021-06-05 16:07:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,436 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2021-06-05 16:07:15,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 16:07:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2021-06-05 16:07:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:07:15,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,437 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] [2021-06-05 16:07:15,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 16:07:15,437 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash -81453676, now seen corresponding path program 1 times [2021-06-05 16:07:15,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366588063] [2021-06-05 16:07:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:15,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366588063] [2021-06-05 16:07:15,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366588063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:15,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219830300] [2021-06-05 16:07:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 16:07:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:15,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219830300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:15,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:15,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 16:07:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145669560] [2021-06-05 16:07:15,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:15,561 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:15,600 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2021-06-05 16:07:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:07:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:15,603 INFO L225 Difference]: With dead ends: 251 [2021-06-05 16:07:15,603 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 16:07:15,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 16:07:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2021-06-05 16:07:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 16:07:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2021-06-05 16:07:15,613 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2021-06-05 16:07:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:15,613 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2021-06-05 16:07:15,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2021-06-05 16:07:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:15,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:15,614 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] [2021-06-05 16:07:15,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 16:07:15,825 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1893391950, now seen corresponding path program 1 times [2021-06-05 16:07:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:15,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331491085] [2021-06-05 16:07:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331491085] [2021-06-05 16:07:15,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331491085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238057984] [2021-06-05 16:07:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:15,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 16:07:16,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:16,031 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 16:07:16,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:16,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:5 [2021-06-05 16:07:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:16,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238057984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:16,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:16,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:07:16,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062085015] [2021-06-05 16:07:16,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:07:16,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:16,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:07:16,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:16,071 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:16,143 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2021-06-05 16:07:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:07:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:16,145 INFO L225 Difference]: With dead ends: 377 [2021-06-05 16:07:16,145 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 16:07:16,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 16:07:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2021-06-05 16:07:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 16:07:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2021-06-05 16:07:16,151 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2021-06-05 16:07:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:16,151 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2021-06-05 16:07:16,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2021-06-05 16:07:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:16,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:16,152 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] [2021-06-05 16:07:16,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 16:07:16,370 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 373177330, now seen corresponding path program 2 times [2021-06-05 16:07:16,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:16,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660684658] [2021-06-05 16:07:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:16,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660684658] [2021-06-05 16:07:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660684658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34629606] [2021-06-05 16:07:16,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:16,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:16,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-06-05 16:07:16,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:16,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 16:07:16,563 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 16:07:16,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:16,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:16,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 16:07:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:16,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34629606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:16,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:16,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:07:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343532614] [2021-06-05 16:07:16,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:07:16,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:07:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:16,600 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 16:07:16,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:16,684 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2021-06-05 16:07:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 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 22 [2021-06-05 16:07:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:16,686 INFO L225 Difference]: With dead ends: 402 [2021-06-05 16:07:16,686 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 16:07:16,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 16:07:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2021-06-05 16:07:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 16:07:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2021-06-05 16:07:16,692 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2021-06-05 16:07:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:16,692 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2021-06-05 16:07:16,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 16:07:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2021-06-05 16:07:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:16,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:16,693 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] [2021-06-05 16:07:16,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:16,909 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1309111346, now seen corresponding path program 3 times [2021-06-05 16:07:16,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:16,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821947716] [2021-06-05 16:07:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:16,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821947716] [2021-06-05 16:07:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821947716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775352050] [2021-06-05 16:07:16,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:16,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:07:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:17,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 16:07:17,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:17,076 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 18 treesize of output 12 [2021-06-05 16:07:17,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:17,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2021-06-05 16:07:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:17,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775352050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:17,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:17,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:07:17,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552144267] [2021-06-05 16:07:17,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:07:17,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:17,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:07:17,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:17,101 INFO L87 Difference]: Start difference. First operand 294 states and 868 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:17,148 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2021-06-05 16:07:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:07:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:17,150 INFO L225 Difference]: With dead ends: 461 [2021-06-05 16:07:17,150 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 16:07:17,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 16:07:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-06-05 16:07:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 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 16:07:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2021-06-05 16:07:17,157 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2021-06-05 16:07:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:17,157 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2021-06-05 16:07:17,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2021-06-05 16:07:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:17,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:17,158 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] [2021-06-05 16:07:17,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 16:07:17,372 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1440075702, now seen corresponding path program 4 times [2021-06-05 16:07:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:17,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263300108] [2021-06-05 16:07:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:17,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:17,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263300108] [2021-06-05 16:07:17,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263300108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23230158] [2021-06-05 16:07:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:17,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:17,499 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 25 treesize of output 19 [2021-06-05 16:07:17,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:17,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:21 [2021-06-05 16:07:17,517 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 20 treesize of output 14 [2021-06-05 16:07:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:17,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-06-05 16:07:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:17,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23230158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:17,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:17,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 16:07:17,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302191191] [2021-06-05 16:07:17,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:17,557 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 16:07:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:17,616 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2021-06-05 16:07:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-06-05 16:07:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:17,618 INFO L225 Difference]: With dead ends: 435 [2021-06-05 16:07:17,618 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 16:07:17,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 16:07:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-06-05 16:07:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 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 16:07:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2021-06-05 16:07:17,625 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2021-06-05 16:07:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:17,625 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2021-06-05 16:07:17,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 16:07:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2021-06-05 16:07:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:17,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:17,626 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] [2021-06-05 16:07:17,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:17,841 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 906040790, now seen corresponding path program 5 times [2021-06-05 16:07:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642644715] [2021-06-05 16:07:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:17,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:17,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642644715] [2021-06-05 16:07:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642644715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:17,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888839400] [2021-06-05 16:07:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:17,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:17,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:17,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:17,981 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 18 treesize of output 14 [2021-06-05 16:07:17,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:17,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:17,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 16:07:18,011 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 16:07:18,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:18,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:7 [2021-06-05 16:07:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888839400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:18,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 16:07:18,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076086884] [2021-06-05 16:07:18,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:07:18,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:07:18,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:18,035 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 16:07:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:18,097 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2021-06-05 16:07:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 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 22 [2021-06-05 16:07:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:18,099 INFO L225 Difference]: With dead ends: 471 [2021-06-05 16:07:18,099 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 16:07:18,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 16:07:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2021-06-05 16:07:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 16:07:18,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 16:07:18,105 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 16:07:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:18,105 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 16:07:18,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 16:07:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 16:07:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:07:18,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:18,106 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] [2021-06-05 16:07:18,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:07:18,321 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1893532402, now seen corresponding path program 6 times [2021-06-05 16:07:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:18,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492331127] [2021-06-05 16:07:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:18,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:18,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492331127] [2021-06-05 16:07:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492331127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792099017] [2021-06-05 16:07:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:18,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:07:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:07:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:18,434 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 18 treesize of output 14 [2021-06-05 16:07:18,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:18,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:14 [2021-06-05 16:07:18,448 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 20 treesize of output 14 [2021-06-05 16:07:18,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:18,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:18,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2021-06-05 16:07:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:18,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792099017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:18,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:07:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909218248] [2021-06-05 16:07:18,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:07:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:07:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:18,474 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:18,541 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2021-06-05 16:07:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:07:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:07:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:18,543 INFO L225 Difference]: With dead ends: 463 [2021-06-05 16:07:18,543 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 16:07:18,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 16:07:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2021-06-05 16:07:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 16:07:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 16:07:18,550 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 16:07:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:18,550 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 16:07:18,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 16:07:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:18,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:18,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:18,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:07:18,769 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1605954960, now seen corresponding path program 7 times [2021-06-05 16:07:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895725708] [2021-06-05 16:07:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:18,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895725708] [2021-06-05 16:07:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895725708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145719126] [2021-06-05 16:07:18,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:18,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:18,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145719126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:18,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:18,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:07:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786255852] [2021-06-05 16:07:18,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:07:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:07:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:18,861 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:18,940 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2021-06-05 16:07:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:18,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:18,943 INFO L225 Difference]: With dead ends: 800 [2021-06-05 16:07:18,944 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 16:07:18,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:07:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 16:07:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2021-06-05 16:07:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 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 16:07:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2021-06-05 16:07:18,953 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2021-06-05 16:07:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:18,953 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2021-06-05 16:07:18,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2021-06-05 16:07:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:18,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:18,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:19,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:07:19,161 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1027617620, now seen corresponding path program 8 times [2021-06-05 16:07:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:19,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572907961] [2021-06-05 16:07:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:19,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572907961] [2021-06-05 16:07:19,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572907961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:19,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665159812] [2021-06-05 16:07:19,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:19,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:07:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:19,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665159812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:19,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:19,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 16:07:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992056070] [2021-06-05 16:07:19,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:07:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:07:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:07:19,253 INFO L87 Difference]: Start difference. First operand 428 states and 1322 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:19,672 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2021-06-05 16:07:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:07:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:19,676 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 16:07:19,676 INFO L226 Difference]: Without dead ends: 1252 [2021-06-05 16:07:19,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:07:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-06-05 16:07:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2021-06-05 16:07:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 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 16:07:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2021-06-05 16:07:19,692 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2021-06-05 16:07:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:19,692 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2021-06-05 16:07:19,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2021-06-05 16:07:19,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:19,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:19,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:19,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:07:19,910 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash 590648912, now seen corresponding path program 9 times [2021-06-05 16:07:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:19,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206116747] [2021-06-05 16:07:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:19,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:19,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206116747] [2021-06-05 16:07:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206116747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:19,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560364307] [2021-06-05 16:07:19,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:19,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:07:19,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:19,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:19,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:20,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560364307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:20,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:20,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:07:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986518632] [2021-06-05 16:07:20,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:07:20,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:07:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:20,016 INFO L87 Difference]: Start difference. First operand 716 states and 2314 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:20,088 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2021-06-05 16:07:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:20,093 INFO L225 Difference]: With dead ends: 1440 [2021-06-05 16:07:20,093 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 16:07:20,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:07:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 16:07:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2021-06-05 16:07:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 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 16:07:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2021-06-05 16:07:20,112 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2021-06-05 16:07:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:20,112 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2021-06-05 16:07:20,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2021-06-05 16:07:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:20,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:20,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:20,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:20,329 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1807517862, now seen corresponding path program 10 times [2021-06-05 16:07:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:20,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847473120] [2021-06-05 16:07:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:20,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847473120] [2021-06-05 16:07:20,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847473120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538853092] [2021-06-05 16:07:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:20,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:20,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:20,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538853092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:20,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:20,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:20,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181914818] [2021-06-05 16:07:20,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:20,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:20,422 INFO L87 Difference]: Start difference. First operand 986 states and 3247 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:20,482 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2021-06-05 16:07:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:07:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:20,487 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 16:07:20,487 INFO L226 Difference]: Without dead ends: 1343 [2021-06-05 16:07:20,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-06-05 16:07:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2021-06-05 16:07:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 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 16:07:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2021-06-05 16:07:20,508 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2021-06-05 16:07:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:20,508 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2021-06-05 16:07:20,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2021-06-05 16:07:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:20,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:20,510 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:20,728 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash -634548306, now seen corresponding path program 11 times [2021-06-05 16:07:20,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:20,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358704980] [2021-06-05 16:07:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:20,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:20,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358704980] [2021-06-05 16:07:20,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358704980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:20,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728654172] [2021-06-05 16:07:20,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:20,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:07:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:07:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:20,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728654172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:20,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:20,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:07:20,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818357421] [2021-06-05 16:07:20,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:07:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:07:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:07:20,821 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:20,893 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2021-06-05 16:07:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:20,901 INFO L225 Difference]: With dead ends: 2033 [2021-06-05 16:07:20,901 INFO L226 Difference]: Without dead ends: 2018 [2021-06-05 16:07:20,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:07:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-06-05 16:07:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2021-06-05 16:07:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 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 16:07:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2021-06-05 16:07:20,932 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2021-06-05 16:07:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:20,932 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2021-06-05 16:07:20,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2021-06-05 16:07:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:20,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:20,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:21,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 16:07:21,149 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1247760558, now seen corresponding path program 12 times [2021-06-05 16:07:21,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:21,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472201226] [2021-06-05 16:07:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:21,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472201226] [2021-06-05 16:07:21,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472201226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515429315] [2021-06-05 16:07:21,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:21,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:07:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:21,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515429315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:21,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:21,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971168708] [2021-06-05 16:07:21,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:21,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:21,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:21,227 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:21,279 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2021-06-05 16:07:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:21,287 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 16:07:21,287 INFO L226 Difference]: Without dead ends: 1922 [2021-06-05 16:07:21,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-06-05 16:07:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2021-06-05 16:07:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 0 states have call successors, (0), 0 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 16:07:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2021-06-05 16:07:21,314 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2021-06-05 16:07:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:21,314 INFO L482 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2021-06-05 16:07:21,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2021-06-05 16:07:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:21,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:21,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:21,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:21,526 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:21,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2047216916, now seen corresponding path program 13 times [2021-06-05 16:07:21,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:21,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58775948] [2021-06-05 16:07:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:21,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58775948] [2021-06-05 16:07:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58775948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967248305] [2021-06-05 16:07:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:21,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967248305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:21,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529302784] [2021-06-05 16:07:21,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:21,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:21,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:21,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:21,592 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:21,644 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2021-06-05 16:07:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:07:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:21,655 INFO L225 Difference]: With dead ends: 2961 [2021-06-05 16:07:21,655 INFO L226 Difference]: Without dead ends: 2952 [2021-06-05 16:07:21,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-06-05 16:07:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2021-06-05 16:07:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 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 16:07:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2021-06-05 16:07:21,697 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2021-06-05 16:07:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:21,697 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2021-06-05 16:07:21,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2021-06-05 16:07:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:21,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:21,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:21,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:07:21,909 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:21,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:21,909 INFO L82 PathProgramCache]: Analyzing trace with hash -657880004, now seen corresponding path program 14 times [2021-06-05 16:07:21,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:21,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19510702] [2021-06-05 16:07:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:21,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19510702] [2021-06-05 16:07:21,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19510702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291840239] [2021-06-05 16:07:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:21,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:21,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:21,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291840239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:21,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:21,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:21,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200368981] [2021-06-05 16:07:21,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:21,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:21,991 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:22,048 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2021-06-05 16:07:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:22,062 INFO L225 Difference]: With dead ends: 3041 [2021-06-05 16:07:22,062 INFO L226 Difference]: Without dead ends: 3041 [2021-06-05 16:07:22,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-05 16:07:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2021-06-05 16:07:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 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 16:07:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2021-06-05 16:07:22,129 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2021-06-05 16:07:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:22,129 INFO L482 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2021-06-05 16:07:22,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2021-06-05 16:07:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:22,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:22,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:22,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:22,349 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:22,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:22,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1385038064, now seen corresponding path program 15 times [2021-06-05 16:07:22,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:22,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691650078] [2021-06-05 16:07:22,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:22,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:22,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691650078] [2021-06-05 16:07:22,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691650078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:22,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137333603] [2021-06-05 16:07:22,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:22,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:07:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:22,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137333603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:22,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:22,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 16:07:22,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600458942] [2021-06-05 16:07:22,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:07:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:07:22,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:07:22,447 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:22,931 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2021-06-05 16:07:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:07:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:22,951 INFO L225 Difference]: With dead ends: 9230 [2021-06-05 16:07:22,952 INFO L226 Difference]: Without dead ends: 8962 [2021-06-05 16:07:22,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:07:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-05 16:07:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2021-06-05 16:07:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 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 16:07:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2021-06-05 16:07:23,087 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2021-06-05 16:07:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:23,087 INFO L482 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2021-06-05 16:07:23,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2021-06-05 16:07:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:23,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:23,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:23,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:07:23,309 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1687186486, now seen corresponding path program 16 times [2021-06-05 16:07:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:23,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703254940] [2021-06-05 16:07:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:23,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:23,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703254940] [2021-06-05 16:07:23,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703254940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:23,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256996283] [2021-06-05 16:07:23,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:23,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:07:23,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256996283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:23,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:23,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146788485] [2021-06-05 16:07:23,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:23,388 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 16:07:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:23,447 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2021-06-05 16:07:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:07:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 24 [2021-06-05 16:07:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:23,459 INFO L225 Difference]: With dead ends: 5640 [2021-06-05 16:07:23,459 INFO L226 Difference]: Without dead ends: 5614 [2021-06-05 16:07:23,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-06-05 16:07:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2021-06-05 16:07:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 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 16:07:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2021-06-05 16:07:23,542 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2021-06-05 16:07:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:23,542 INFO L482 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2021-06-05 16:07:23,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 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 16:07:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2021-06-05 16:07:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:23,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:23,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:23,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:07:23,768 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash -72104176, now seen corresponding path program 17 times [2021-06-05 16:07:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:23,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710221085] [2021-06-05 16:07:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:23,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710221085] [2021-06-05 16:07:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710221085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166005949] [2021-06-05 16:07:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:23,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:07:23,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:23,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166005949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:23,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:23,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 16:07:23,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692870042] [2021-06-05 16:07:23,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:07:23,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:07:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:23,860 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:24,082 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2021-06-05 16:07:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:07:24,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:24,095 INFO L225 Difference]: With dead ends: 6419 [2021-06-05 16:07:24,096 INFO L226 Difference]: Without dead ends: 6345 [2021-06-05 16:07:24,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:07:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2021-06-05 16:07:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2021-06-05 16:07:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 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 16:07:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2021-06-05 16:07:24,187 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2021-06-05 16:07:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:24,187 INFO L482 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2021-06-05 16:07:24,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2021-06-05 16:07:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:24,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:24,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:24,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:07:24,412 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1793507450, now seen corresponding path program 18 times [2021-06-05 16:07:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:24,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776454441] [2021-06-05 16:07:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776454441] [2021-06-05 16:07:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776454441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539715482] [2021-06-05 16:07:24,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:24,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:07:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539715482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:24,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:24,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35274750] [2021-06-05 16:07:24,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:24,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:24,486 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:24,554 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2021-06-05 16:07:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:07:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:24,565 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 16:07:24,566 INFO L226 Difference]: Without dead ends: 5906 [2021-06-05 16:07:24,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:07:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2021-06-05 16:07:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2021-06-05 16:07:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 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 16:07:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2021-06-05 16:07:24,651 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2021-06-05 16:07:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:24,651 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2021-06-05 16:07:24,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2021-06-05 16:07:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:24,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:24,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:24,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 16:07:24,876 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash -591195082, now seen corresponding path program 19 times [2021-06-05 16:07:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259233843] [2021-06-05 16:07:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:24,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:24,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259233843] [2021-06-05 16:07:24,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259233843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:24,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626146881] [2021-06-05 16:07:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:07:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:07:24,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626146881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:24,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:24,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:07:24,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542456535] [2021-06-05 16:07:24,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:07:24,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:24,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:07:24,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:07:24,951 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:25,022 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2021-06-05 16:07:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:07:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:25,034 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 16:07:25,034 INFO L226 Difference]: Without dead ends: 6177 [2021-06-05 16:07:25,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2021-06-05 16:07:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2021-06-05 16:07:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 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 16:07:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2021-06-05 16:07:25,153 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2021-06-05 16:07:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:25,153 INFO L482 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2021-06-05 16:07:25,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2021-06-05 16:07:25,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:25,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:25,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:25,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 16:07:25,369 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1864128790, now seen corresponding path program 20 times [2021-06-05 16:07:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720161741] [2021-06-05 16:07:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:25,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720161741] [2021-06-05 16:07:25,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720161741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:25,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619678973] [2021-06-05 16:07:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:25,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:25,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:07:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:25,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619678973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:25,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:25,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 16:07:25,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523654846] [2021-06-05 16:07:25,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:07:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:07:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:25,458 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:25,826 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2021-06-05 16:07:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:07:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:25,837 INFO L225 Difference]: With dead ends: 7179 [2021-06-05 16:07:25,837 INFO L226 Difference]: Without dead ends: 7111 [2021-06-05 16:07:25,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:07:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-06-05 16:07:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2021-06-05 16:07:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 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 16:07:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2021-06-05 16:07:25,961 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2021-06-05 16:07:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:25,961 INFO L482 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2021-06-05 16:07:25,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2021-06-05 16:07:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:25,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:25,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:26,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:26,189 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:26,189 INFO L82 PathProgramCache]: Analyzing trace with hash 437269908, now seen corresponding path program 21 times [2021-06-05 16:07:26,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:26,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491136351] [2021-06-05 16:07:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:26,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491136351] [2021-06-05 16:07:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491136351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:26,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793476270] [2021-06-05 16:07:26,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:26,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:07:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:07:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:07:26,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793476270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:26,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:26,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 16:07:26,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891462690] [2021-06-05 16:07:26,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:07:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:07:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:26,301 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:26,730 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2021-06-05 16:07:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:07:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:26,752 INFO L225 Difference]: With dead ends: 11751 [2021-06-05 16:07:26,753 INFO L226 Difference]: Without dead ends: 11587 [2021-06-05 16:07:26,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:07:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-06-05 16:07:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2021-06-05 16:07:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 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 16:07:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2021-06-05 16:07:26,905 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2021-06-05 16:07:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:26,905 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2021-06-05 16:07:26,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2021-06-05 16:07:26,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:07:26,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:26,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:27,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 16:07:27,133 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:27,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:27,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1422809918, now seen corresponding path program 22 times [2021-06-05 16:07:27,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:27,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523100986] [2021-06-05 16:07:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:27,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:27,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523100986] [2021-06-05 16:07:27,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523100986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:27,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308637109] [2021-06-05 16:07:27,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:27,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:27,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:07:27,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308637109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:27,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:27,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 16:07:27,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155248904] [2021-06-05 16:07:27,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:07:27,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:27,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:07:27,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:07:27,273 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:27,417 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2021-06-05 16:07:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:07:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:07:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:27,434 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 16:07:27,434 INFO L226 Difference]: Without dead ends: 9392 [2021-06-05 16:07:27,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:07:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-06-05 16:07:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2021-06-05 16:07:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 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 16:07:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2021-06-05 16:07:27,578 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2021-06-05 16:07:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:27,579 INFO L482 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2021-06-05 16:07:27,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2021-06-05 16:07:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:27,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:27,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:27,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:27,808 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1052800080, now seen corresponding path program 23 times [2021-06-05 16:07:27,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:27,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470918093] [2021-06-05 16:07:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:28,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:28,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470918093] [2021-06-05 16:07:28,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470918093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:28,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227993617] [2021-06-05 16:07:28,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:28,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:07:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:07:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:28,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:28,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:28,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:28,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:28,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:67 [2021-06-05 16:07:28,280 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_19], 2=[A]} [2021-06-05 16:07:28,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:28,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:28,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:28,353 INFO L518 ElimStorePlain]: Eliminatee v_C_19 vanished before elimination [2021-06-05 16:07:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:28,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:28,357 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 29 treesize of output 17 [2021-06-05 16:07:28,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:28,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:28,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:28,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227993617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:28,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:28,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310558723] [2021-06-05 16:07:28,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:28,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:28,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:28,382 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:28,912 INFO L93 Difference]: Finished difference Result 11583 states and 42036 transitions. [2021-06-05 16:07:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:07:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:28,932 INFO L225 Difference]: With dead ends: 11583 [2021-06-05 16:07:28,932 INFO L226 Difference]: Without dead ends: 11568 [2021-06-05 16:07:28,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2021-06-05 16:07:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 8601. [2021-06-05 16:07:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.716860465116279) internal successors, (31965), 8600 states have internal predecessors, (31965), 0 states have call successors, (0), 0 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 16:07:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 31965 transitions. [2021-06-05 16:07:29,078 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 31965 transitions. Word has length 28 [2021-06-05 16:07:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:29,079 INFO L482 AbstractCegarLoop]: Abstraction has 8601 states and 31965 transitions. [2021-06-05 16:07:29,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 31965 transitions. [2021-06-05 16:07:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:29,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:29,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:29,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 16:07:29,308 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1677459088, now seen corresponding path program 24 times [2021-06-05 16:07:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:29,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436048033] [2021-06-05 16:07:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:29,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:29,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436048033] [2021-06-05 16:07:29,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436048033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:29,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339016837] [2021-06-05 16:07:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:29,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:07:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:29,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:29,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:29,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:29,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:29,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 16:07:29,810 INFO L446 ElimStorePlain]: Different costs {0=[v_C_21, B], 2=[A]} [2021-06-05 16:07:29,813 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 24 treesize of output 20 [2021-06-05 16:07:29,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:29,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:29,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 16:07:29,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:29,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:29,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:29,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:29,833 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 29 treesize of output 17 [2021-06-05 16:07:29,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:29,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:29,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:29,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:29,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339016837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:29,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:29,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699486421] [2021-06-05 16:07:29,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:29,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:29,855 INFO L87 Difference]: Start difference. First operand 8601 states and 31965 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:30,294 INFO L93 Difference]: Finished difference Result 11653 states and 42250 transitions. [2021-06-05 16:07:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:07:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:30,314 INFO L225 Difference]: With dead ends: 11653 [2021-06-05 16:07:30,314 INFO L226 Difference]: Without dead ends: 11611 [2021-06-05 16:07:30,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2021-06-05 16:07:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 8620. [2021-06-05 16:07:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8620 states, 8619 states have (on average 3.716092354101404) internal successors, (32029), 8619 states have internal predecessors, (32029), 0 states have call successors, (0), 0 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 16:07:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8620 states to 8620 states and 32029 transitions. [2021-06-05 16:07:30,489 INFO L78 Accepts]: Start accepts. Automaton has 8620 states and 32029 transitions. Word has length 28 [2021-06-05 16:07:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:30,489 INFO L482 AbstractCegarLoop]: Abstraction has 8620 states and 32029 transitions. [2021-06-05 16:07:30,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8620 states and 32029 transitions. [2021-06-05 16:07:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:30,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:30,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:30,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:07:30,701 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:30,701 INFO L82 PathProgramCache]: Analyzing trace with hash -350938928, now seen corresponding path program 25 times [2021-06-05 16:07:30,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:30,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855771049] [2021-06-05 16:07:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:30,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855771049] [2021-06-05 16:07:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855771049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:30,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96004147] [2021-06-05 16:07:30,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:31,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:31,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:31,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 16:07:31,057 INFO L446 ElimStorePlain]: Different costs {0=[v_C_23], 3=[A]} [2021-06-05 16:07:31,059 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 32 treesize of output 24 [2021-06-05 16:07:31,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:31,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:31,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:31,072 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 47 treesize of output 29 [2021-06-05 16:07:31,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:31,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-06-05 16:07:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:07:31,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:31,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:31,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:07:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:31,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96004147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:31,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:31,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656829969] [2021-06-05 16:07:31,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:31,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:31,124 INFO L87 Difference]: Start difference. First operand 8620 states and 32029 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:31,679 INFO L93 Difference]: Finished difference Result 11729 states and 42507 transitions. [2021-06-05 16:07:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:07:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:31,701 INFO L225 Difference]: With dead ends: 11729 [2021-06-05 16:07:31,701 INFO L226 Difference]: Without dead ends: 11714 [2021-06-05 16:07:31,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2021-06-05 16:07:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 8638. [2021-06-05 16:07:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8638 states, 8637 states have (on average 3.717031376635406) internal successors, (32104), 8637 states have internal predecessors, (32104), 0 states have call successors, (0), 0 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 16:07:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 32104 transitions. [2021-06-05 16:07:31,863 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 32104 transitions. Word has length 28 [2021-06-05 16:07:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:31,863 INFO L482 AbstractCegarLoop]: Abstraction has 8638 states and 32104 transitions. [2021-06-05 16:07:31,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 32104 transitions. [2021-06-05 16:07:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:31,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:31,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:32,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:07:32,077 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1471520656, now seen corresponding path program 26 times [2021-06-05 16:07:32,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:32,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724565272] [2021-06-05 16:07:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:32,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:32,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724565272] [2021-06-05 16:07:32,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724565272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:32,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431104679] [2021-06-05 16:07:32,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:32,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:32,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:32,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:32,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 16:07:32,515 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_25], 2=[A]} [2021-06-05 16:07:32,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:32,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,524 INFO L518 ElimStorePlain]: Eliminatee v_C_25 vanished before elimination [2021-06-05 16:07:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:32,527 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 33 treesize of output 21 [2021-06-05 16:07:32,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:32,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:32,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:32,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431104679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:32,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:32,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609739529] [2021-06-05 16:07:32,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:32,551 INFO L87 Difference]: Start difference. First operand 8638 states and 32104 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:33,142 INFO L93 Difference]: Finished difference Result 11712 states and 42480 transitions. [2021-06-05 16:07:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:07:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:33,161 INFO L225 Difference]: With dead ends: 11712 [2021-06-05 16:07:33,162 INFO L226 Difference]: Without dead ends: 11697 [2021-06-05 16:07:33,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:07:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-06-05 16:07:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 8684. [2021-06-05 16:07:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.71542093746401) internal successors, (32261), 8683 states have internal predecessors, (32261), 0 states have call successors, (0), 0 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 16:07:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 32261 transitions. [2021-06-05 16:07:33,292 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 32261 transitions. Word has length 28 [2021-06-05 16:07:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:33,292 INFO L482 AbstractCegarLoop]: Abstraction has 8684 states and 32261 transitions. [2021-06-05 16:07:33,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 32261 transitions. [2021-06-05 16:07:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:33,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:33,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:33,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 16:07:33,505 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -556877360, now seen corresponding path program 27 times [2021-06-05 16:07:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:33,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973133891] [2021-06-05 16:07:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:33,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:33,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973133891] [2021-06-05 16:07:33,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973133891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:33,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997614643] [2021-06-05 16:07:33,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:33,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:07:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:07:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:33,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:33,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:33,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:33,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:33,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 16:07:33,937 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 3=[A]} [2021-06-05 16:07:33,940 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 24 treesize of output 20 [2021-06-05 16:07:33,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:33,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:33,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:33,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 16:07:33,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:34,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:34,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:34,044 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:92 [2021-06-05 16:07:34,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:07:34,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:34,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:34,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 16:07:34,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:07:34,210 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:07:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 16:07:34,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:07:34,216 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:34,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:34,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:07:34,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:34,266 INFO L628 ElimStorePlain]: treesize reduction 49, result has 55.0 percent of original size [2021-06-05 16:07:34,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:34,268 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:212, output treesize:62 [2021-06-05 16:07:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997614643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:34,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:34,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:07:34,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395036394] [2021-06-05 16:07:34,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:07:34,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:07:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:07:34,330 INFO L87 Difference]: Start difference. First operand 8684 states and 32261 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:35,082 INFO L93 Difference]: Finished difference Result 11951 states and 43153 transitions. [2021-06-05 16:07:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:07:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:35,103 INFO L225 Difference]: With dead ends: 11951 [2021-06-05 16:07:35,103 INFO L226 Difference]: Without dead ends: 11879 [2021-06-05 16:07:35,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:07:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-06-05 16:07:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 8687. [2021-06-05 16:07:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 3.7159797375086345) internal successors, (32277), 8686 states have internal predecessors, (32277), 0 states have call successors, (0), 0 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 16:07:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 32277 transitions. [2021-06-05 16:07:35,234 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 32277 transitions. Word has length 28 [2021-06-05 16:07:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:35,234 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 32277 transitions. [2021-06-05 16:07:35,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 32277 transitions. [2021-06-05 16:07:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:35,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:35,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:35,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 16:07:35,447 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:35,447 INFO L82 PathProgramCache]: Analyzing trace with hash 108829392, now seen corresponding path program 28 times [2021-06-05 16:07:35,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:35,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020963459] [2021-06-05 16:07:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:35,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020963459] [2021-06-05 16:07:35,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020963459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245336849] [2021-06-05 16:07:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:35,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:35,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:35,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:35,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:35,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:35,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-06-05 16:07:35,800 INFO L446 ElimStorePlain]: Different costs {0=[v_C_29], 3=[A]} [2021-06-05 16:07:35,802 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 28 treesize of output 24 [2021-06-05 16:07:35,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:35,816 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 43 treesize of output 29 [2021-06-05 16:07:35,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:35,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 16:07:35,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:07:35,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:35,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:35,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:07:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:35,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245336849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:35,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:35,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:35,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454605276] [2021-06-05 16:07:35,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:35,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:35,901 INFO L87 Difference]: Start difference. First operand 8687 states and 32277 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:36,381 INFO L93 Difference]: Finished difference Result 11740 states and 42594 transitions. [2021-06-05 16:07:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:07:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:36,402 INFO L225 Difference]: With dead ends: 11740 [2021-06-05 16:07:36,402 INFO L226 Difference]: Without dead ends: 11725 [2021-06-05 16:07:36,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:07:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-06-05 16:07:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 8719. [2021-06-05 16:07:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.714269327827483) internal successors, (32381), 8718 states have internal predecessors, (32381), 0 states have call successors, (0), 0 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 16:07:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 32381 transitions. [2021-06-05 16:07:36,535 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 32381 transitions. Word has length 28 [2021-06-05 16:07:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:36,535 INFO L482 AbstractCegarLoop]: Abstraction has 8719 states and 32381 transitions. [2021-06-05 16:07:36,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 32381 transitions. [2021-06-05 16:07:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:36,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:36,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:36,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:36,752 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1194690256, now seen corresponding path program 29 times [2021-06-05 16:07:36,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:36,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965897499] [2021-06-05 16:07:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:36,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:36,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965897499] [2021-06-05 16:07:36,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965897499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:36,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309656907] [2021-06-05 16:07:36,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:36,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:07:36,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:36,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:37,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:37,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:37,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:37,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:37,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-05 16:07:37,125 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_31], 2=[A]} [2021-06-05 16:07:37,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:37,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:37,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:37,136 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 18 treesize of output 14 [2021-06-05 16:07:37,137 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:37,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:37,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:37,146 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 33 treesize of output 21 [2021-06-05 16:07:37,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:37,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:37,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:37,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309656907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:37,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:37,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:37,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933609931] [2021-06-05 16:07:37,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:37,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:37,176 INFO L87 Difference]: Start difference. First operand 8719 states and 32381 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:37,832 INFO L93 Difference]: Finished difference Result 11783 states and 42686 transitions. [2021-06-05 16:07:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:07:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:37,853 INFO L225 Difference]: With dead ends: 11783 [2021-06-05 16:07:37,853 INFO L226 Difference]: Without dead ends: 11758 [2021-06-05 16:07:37,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:07:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-06-05 16:07:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8765. [2021-06-05 16:07:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 3.7110908261068007) internal successors, (32524), 8764 states have internal predecessors, (32524), 0 states have call successors, (0), 0 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 16:07:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 32524 transitions. [2021-06-05 16:07:38,039 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 32524 transitions. Word has length 28 [2021-06-05 16:07:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:38,039 INFO L482 AbstractCegarLoop]: Abstraction has 8765 states and 32524 transitions. [2021-06-05 16:07:38,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 32524 transitions. [2021-06-05 16:07:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:38,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:38,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:38,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:38,265 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1819349264, now seen corresponding path program 30 times [2021-06-05 16:07:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:38,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941446589] [2021-06-05 16:07:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:38,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:38,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941446589] [2021-06-05 16:07:38,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941446589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:38,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844038870] [2021-06-05 16:07:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:38,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:07:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:38,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:38,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:38,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:38,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:38,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 16:07:38,680 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_33], 2=[A]} [2021-06-05 16:07:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:38,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:38,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:38,691 INFO L518 ElimStorePlain]: Eliminatee v_C_33 vanished before elimination [2021-06-05 16:07:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:38,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:38,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 16:07:38,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:38,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:38,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:38,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:38,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844038870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:38,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:38,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739775422] [2021-06-05 16:07:38,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:38,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:38,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:38,717 INFO L87 Difference]: Start difference. First operand 8765 states and 32524 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:39,216 INFO L93 Difference]: Finished difference Result 11773 states and 42654 transitions. [2021-06-05 16:07:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:07:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:39,237 INFO L225 Difference]: With dead ends: 11773 [2021-06-05 16:07:39,237 INFO L226 Difference]: Without dead ends: 11710 [2021-06-05 16:07:39,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:07:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11710 states. [2021-06-05 16:07:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11710 to 8784. [2021-06-05 16:07:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 3.709552544688603) internal successors, (32581), 8783 states have internal predecessors, (32581), 0 states have call successors, (0), 0 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 16:07:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 32581 transitions. [2021-06-05 16:07:39,367 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 32581 transitions. Word has length 28 [2021-06-05 16:07:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:39,367 INFO L482 AbstractCegarLoop]: Abstraction has 8784 states and 32581 transitions. [2021-06-05 16:07:39,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 32581 transitions. [2021-06-05 16:07:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:39,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:39,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 16:07:39,580 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -209048752, now seen corresponding path program 31 times [2021-06-05 16:07:39,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:39,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010012084] [2021-06-05 16:07:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:39,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010012084] [2021-06-05 16:07:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010012084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552697581] [2021-06-05 16:07:39,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:39,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:39,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:39,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:39,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:39,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:39,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 16:07:39,995 INFO L446 ElimStorePlain]: Different costs {0=[v_C_35], 3=[A]} [2021-06-05 16:07:39,997 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 32 treesize of output 24 [2021-06-05 16:07:39,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:40,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:40,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:40,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:40,012 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 47 treesize of output 29 [2021-06-05 16:07:40,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:40,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:40,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:40,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:35 [2021-06-05 16:07:40,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:07:40,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:40,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:40,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:40,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:07:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:40,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552697581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:40,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:40,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:40,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185329033] [2021-06-05 16:07:40,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:40,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:40,065 INFO L87 Difference]: Start difference. First operand 8784 states and 32581 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:40,722 INFO L93 Difference]: Finished difference Result 11864 states and 42950 transitions. [2021-06-05 16:07:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:07:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:40,743 INFO L225 Difference]: With dead ends: 11864 [2021-06-05 16:07:40,743 INFO L226 Difference]: Without dead ends: 11839 [2021-06-05 16:07:40,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:07:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11839 states. [2021-06-05 16:07:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11839 to 8763. [2021-06-05 16:07:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 3.713421593243552) internal successors, (32537), 8762 states have internal predecessors, (32537), 0 states have call successors, (0), 0 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 16:07:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 32537 transitions. [2021-06-05 16:07:40,871 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 32537 transitions. Word has length 28 [2021-06-05 16:07:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:40,872 INFO L482 AbstractCegarLoop]: Abstraction has 8763 states and 32537 transitions. [2021-06-05 16:07:40,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 32537 transitions. [2021-06-05 16:07:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:40,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:40,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:41,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:41,085 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -691193520, now seen corresponding path program 32 times [2021-06-05 16:07:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:41,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993362423] [2021-06-05 16:07:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:41,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:41,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993362423] [2021-06-05 16:07:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993362423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:41,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31042243] [2021-06-05 16:07:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:41,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:41,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:41,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:41,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:41,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:41,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:07:41,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:41,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:41,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:07:41,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:41,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:41,424 INFO L518 ElimStorePlain]: Eliminatee v_C_37 vanished before elimination [2021-06-05 16:07:41,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:41,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:07:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:41,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31042243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:41,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:41,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:07:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878065671] [2021-06-05 16:07:41,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:07:41,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:07:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:07:41,441 INFO L87 Difference]: Start difference. First operand 8763 states and 32537 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:07:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:42,026 INFO L93 Difference]: Finished difference Result 9105 states and 33542 transitions. [2021-06-05 16:07:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:07:42,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 16:07:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:42,041 INFO L225 Difference]: With dead ends: 9105 [2021-06-05 16:07:42,041 INFO L226 Difference]: Without dead ends: 9090 [2021-06-05 16:07:42,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 476.5ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:07:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9090 states. [2021-06-05 16:07:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9090 to 8789. [2021-06-05 16:07:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.7131315430132) internal successors, (32631), 8788 states have internal predecessors, (32631), 0 states have call successors, (0), 0 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 16:07:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 32631 transitions. [2021-06-05 16:07:42,147 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 32631 transitions. Word has length 28 [2021-06-05 16:07:42,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:42,148 INFO L482 AbstractCegarLoop]: Abstraction has 8789 states and 32631 transitions. [2021-06-05 16:07:42,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:07:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 32631 transitions. [2021-06-05 16:07:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:42,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:42,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:42,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:07:42,359 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash 611501012, now seen corresponding path program 33 times [2021-06-05 16:07:42,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:42,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565136946] [2021-06-05 16:07:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:42,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565136946] [2021-06-05 16:07:42,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565136946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:42,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448102009] [2021-06-05 16:07:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:42,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:07:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:07:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:42,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:42,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 16:07:42,769 INFO L446 ElimStorePlain]: Different costs {0=[v_C_39], 2=[A, B]} [2021-06-05 16:07:42,772 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 28 treesize of output 24 [2021-06-05 16:07:42,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 16:07:42,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:07:42,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 65 [2021-06-05 16:07:42,836 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:42,869 INFO L628 ElimStorePlain]: treesize reduction 41, result has 48.1 percent of original size [2021-06-05 16:07:42,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:42,870 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:38 [2021-06-05 16:07:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448102009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:42,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:42,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:07:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355172538] [2021-06-05 16:07:42,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:07:42,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:42,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:07:42,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:07:42,917 INFO L87 Difference]: Start difference. First operand 8789 states and 32631 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:44,233 INFO L93 Difference]: Finished difference Result 11850 states and 42895 transitions. [2021-06-05 16:07:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:07:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:44,252 INFO L225 Difference]: With dead ends: 11850 [2021-06-05 16:07:44,252 INFO L226 Difference]: Without dead ends: 11767 [2021-06-05 16:07:44,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 907.7ms TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:07:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11767 states. [2021-06-05 16:07:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11767 to 8811. [2021-06-05 16:07:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 3.7122587968217933) internal successors, (32705), 8810 states have internal predecessors, (32705), 0 states have call successors, (0), 0 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 16:07:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 32705 transitions. [2021-06-05 16:07:44,384 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 32705 transitions. Word has length 28 [2021-06-05 16:07:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:44,384 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 32705 transitions. [2021-06-05 16:07:44,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 32705 transitions. [2021-06-05 16:07:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:44,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:44,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:44,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:44,607 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1679375576, now seen corresponding path program 34 times [2021-06-05 16:07:44,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:44,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881595104] [2021-06-05 16:07:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:44,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:44,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881595104] [2021-06-05 16:07:44,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881595104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:44,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536391592] [2021-06-05 16:07:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:44,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:44,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:44,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:44,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-06-05 16:07:44,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:44,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:44,956 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 18 treesize of output 14 [2021-06-05 16:07:44,958 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:44,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:44,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 16:07:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:07:44,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:44,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:44,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:07:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:45,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536391592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:45,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:45,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:07:45,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4842965] [2021-06-05 16:07:45,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:07:45,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:45,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:07:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:07:45,003 INFO L87 Difference]: Start difference. First operand 8811 states and 32705 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:45,637 INFO L93 Difference]: Finished difference Result 11773 states and 42754 transitions. [2021-06-05 16:07:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:07:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:45,657 INFO L225 Difference]: With dead ends: 11773 [2021-06-05 16:07:45,657 INFO L226 Difference]: Without dead ends: 11758 [2021-06-05 16:07:45,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:07:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2021-06-05 16:07:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 8839. [2021-06-05 16:07:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8839 states, 8838 states have (on average 3.7121520706042093) internal successors, (32808), 8838 states have internal predecessors, (32808), 0 states have call successors, (0), 0 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 16:07:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 32808 transitions. [2021-06-05 16:07:45,827 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 32808 transitions. Word has length 28 [2021-06-05 16:07:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:45,827 INFO L482 AbstractCegarLoop]: Abstraction has 8839 states and 32808 transitions. [2021-06-05 16:07:45,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 32808 transitions. [2021-06-05 16:07:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:45,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:45,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:46,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:46,041 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1494941196, now seen corresponding path program 35 times [2021-06-05 16:07:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:46,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565711739] [2021-06-05 16:07:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:46,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565711739] [2021-06-05 16:07:46,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565711739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:46,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998059498] [2021-06-05 16:07:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:46,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:07:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:46,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:46,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:46,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:46,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:46,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 16:07:46,496 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_43], 2=[A]} [2021-06-05 16:07:46,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:46,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:46,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:46,506 INFO L518 ElimStorePlain]: Eliminatee v_C_43 vanished before elimination [2021-06-05 16:07:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:46,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:46,508 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 33 treesize of output 21 [2021-06-05 16:07:46,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:46,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:46,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:46,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:46,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998059498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:46,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:46,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:46,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311785881] [2021-06-05 16:07:46,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:46,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:46,528 INFO L87 Difference]: Start difference. First operand 8839 states and 32808 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:46,958 INFO L93 Difference]: Finished difference Result 11850 states and 42962 transitions. [2021-06-05 16:07:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:07:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:46,976 INFO L225 Difference]: With dead ends: 11850 [2021-06-05 16:07:46,977 INFO L226 Difference]: Without dead ends: 11787 [2021-06-05 16:07:46,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2021-06-05 16:07:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 8865. [2021-06-05 16:07:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8864 states have (on average 3.7093862815884475) internal successors, (32880), 8864 states have internal predecessors, (32880), 0 states have call successors, (0), 0 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 16:07:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 32880 transitions. [2021-06-05 16:07:47,101 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 32880 transitions. Word has length 28 [2021-06-05 16:07:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:47,101 INFO L482 AbstractCegarLoop]: Abstraction has 8865 states and 32880 transitions. [2021-06-05 16:07:47,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 32880 transitions. [2021-06-05 16:07:47,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:47,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:47,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:47,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 16:07:47,313 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash 771628084, now seen corresponding path program 36 times [2021-06-05 16:07:47,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:47,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491677281] [2021-06-05 16:07:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:47,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491677281] [2021-06-05 16:07:47,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491677281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:47,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974685752] [2021-06-05 16:07:47,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:47,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:07:47,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:07:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:47,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:47,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-06-05 16:07:47,747 INFO L446 ElimStorePlain]: Different costs {0=[v_C_45], 3=[A]} [2021-06-05 16:07:47,750 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 32 treesize of output 24 [2021-06-05 16:07:47,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:47,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 16:07:47,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:47,822 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:88, output treesize:102 [2021-06-05 16:07:47,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:07:47,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 16:07:47,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:07:47,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:47,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:07:47,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 16:07:47,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:47,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:47,991 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 11 [2021-06-05 16:07:47,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:47,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:07:47,997 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:48,112 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-06-05 16:07:48,112 INFO L628 ElimStorePlain]: treesize reduction 106, result has 36.1 percent of original size [2021-06-05 16:07:48,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:48,114 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:212, output treesize:62 [2021-06-05 16:07:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974685752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:48,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:48,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:07:48,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956338311] [2021-06-05 16:07:48,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:07:48,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:07:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:07:48,175 INFO L87 Difference]: Start difference. First operand 8865 states and 32880 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:48,985 INFO L93 Difference]: Finished difference Result 12047 states and 43486 transitions. [2021-06-05 16:07:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:07:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:49,007 INFO L225 Difference]: With dead ends: 12047 [2021-06-05 16:07:49,007 INFO L226 Difference]: Without dead ends: 11986 [2021-06-05 16:07:49,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:07:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-05 16:07:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 8872. [2021-06-05 16:07:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 3.708826513358133) internal successors, (32901), 8871 states have internal predecessors, (32901), 0 states have call successors, (0), 0 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 16:07:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 32901 transitions. [2021-06-05 16:07:49,138 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 32901 transitions. Word has length 28 [2021-06-05 16:07:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:49,138 INFO L482 AbstractCegarLoop]: Abstraction has 8872 states and 32901 transitions. [2021-06-05 16:07:49,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 32901 transitions. [2021-06-05 16:07:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:49,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:49,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:49,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:49,361 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1703274480, now seen corresponding path program 37 times [2021-06-05 16:07:49,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:49,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93161936] [2021-06-05 16:07:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:49,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93161936] [2021-06-05 16:07:49,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93161936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777166423] [2021-06-05 16:07:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:49,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:49,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:49,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:49,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:49,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:07:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:49,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:49,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:49,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:07:49,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:49,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:49,734 INFO L518 ElimStorePlain]: Eliminatee v_C_47 vanished before elimination [2021-06-05 16:07:49,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:49,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:07:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:49,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777166423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:49,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:49,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:07:49,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684803134] [2021-06-05 16:07:49,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:07:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:07:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:07:49,749 INFO L87 Difference]: Start difference. First operand 8872 states and 32901 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:07:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:50,364 INFO L93 Difference]: Finished difference Result 13042 states and 46993 transitions. [2021-06-05 16:07:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:07:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 16:07:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:50,385 INFO L225 Difference]: With dead ends: 13042 [2021-06-05 16:07:50,386 INFO L226 Difference]: Without dead ends: 12979 [2021-06-05 16:07:50,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:07:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2021-06-05 16:07:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 8887. [2021-06-05 16:07:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8887 states, 8886 states have (on average 3.70717983344587) internal successors, (32942), 8886 states have internal predecessors, (32942), 0 states have call successors, (0), 0 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 16:07:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8887 states to 8887 states and 32942 transitions. [2021-06-05 16:07:50,549 INFO L78 Accepts]: Start accepts. Automaton has 8887 states and 32942 transitions. Word has length 28 [2021-06-05 16:07:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:50,549 INFO L482 AbstractCegarLoop]: Abstraction has 8887 states and 32942 transitions. [2021-06-05 16:07:50,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:07:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8887 states and 32942 transitions. [2021-06-05 16:07:50,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:50,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:50,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:50,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 16:07:50,761 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1572310124, now seen corresponding path program 38 times [2021-06-05 16:07:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172822067] [2021-06-05 16:07:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:50,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:50,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172822067] [2021-06-05 16:07:50,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172822067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:50,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070980742] [2021-06-05 16:07:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:51,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:07:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:51,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:51,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:07:51,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:51,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:51,132 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 18 treesize of output 14 [2021-06-05 16:07:51,134 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:51,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:51,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,139 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 16:07:51,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:07:51,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:51,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:51,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:07:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070980742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:51,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:51,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:07:51,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906625908] [2021-06-05 16:07:51,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:07:51,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:07:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:07:51,177 INFO L87 Difference]: Start difference. First operand 8887 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:51,766 INFO L93 Difference]: Finished difference Result 11822 states and 42875 transitions. [2021-06-05 16:07:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:07:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:51,785 INFO L225 Difference]: With dead ends: 11822 [2021-06-05 16:07:51,785 INFO L226 Difference]: Without dead ends: 11794 [2021-06-05 16:07:51,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:07:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-06-05 16:07:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 8890. [2021-06-05 16:07:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8890 states, 8889 states have (on average 3.7077286533918326) internal successors, (32958), 8889 states have internal predecessors, (32958), 0 states have call successors, (0), 0 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 16:07:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8890 states to 8890 states and 32958 transitions. [2021-06-05 16:07:51,906 INFO L78 Accepts]: Start accepts. Automaton has 8890 states and 32958 transitions. Word has length 28 [2021-06-05 16:07:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:51,906 INFO L482 AbstractCegarLoop]: Abstraction has 8890 states and 32958 transitions. [2021-06-05 16:07:51,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8890 states and 32958 transitions. [2021-06-05 16:07:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:51,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:51,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:52,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:52,118 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2106345036, now seen corresponding path program 39 times [2021-06-05 16:07:52,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:52,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319436596] [2021-06-05 16:07:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:52,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:52,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319436596] [2021-06-05 16:07:52,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319436596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:52,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556407361] [2021-06-05 16:07:52,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:52,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:07:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:52,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 16:07:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:52,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:52,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:52,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:52,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:52,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:07:52,489 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 24 treesize of output 20 [2021-06-05 16:07:52,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:52,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:52,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:52,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:49 [2021-06-05 16:07:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:52,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:52,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:52,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2021-06-05 16:07:52,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:07:52,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:52,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:52,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:100 [2021-06-05 16:07:52,942 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 3=[B, v_prenex_4]} [2021-06-05 16:07:52,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:52,950 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 44 treesize of output 36 [2021-06-05 16:07:52,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:52,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:53,016 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:07:53,017 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 55 treesize of output 51 [2021-06-05 16:07:53,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:53,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:53,085 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-06-05 16:07:53,085 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 59 treesize of output 50 [2021-06-05 16:07:53,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:53,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:53,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:07:53,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:199, output treesize:332 [2021-06-05 16:07:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556407361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:53,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:53,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 16:07:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653904735] [2021-06-05 16:07:53,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:07:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:07:53,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:53,317 INFO L87 Difference]: Start difference. First operand 8890 states and 32958 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:54,491 INFO L93 Difference]: Finished difference Result 9148 states and 33670 transitions. [2021-06-05 16:07:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:07:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:54,506 INFO L225 Difference]: With dead ends: 9148 [2021-06-05 16:07:54,506 INFO L226 Difference]: Without dead ends: 9108 [2021-06-05 16:07:54,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1129.7ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:07:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9108 states. [2021-06-05 16:07:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9108 to 8909. [2021-06-05 16:07:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7074539739559946) internal successors, (33026), 8908 states have internal predecessors, (33026), 0 states have call successors, (0), 0 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 16:07:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33026 transitions. [2021-06-05 16:07:54,615 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33026 transitions. Word has length 28 [2021-06-05 16:07:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:54,615 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33026 transitions. [2021-06-05 16:07:54,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33026 transitions. [2021-06-05 16:07:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:54,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:54,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:54,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 16:07:54,827 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1118853424, now seen corresponding path program 40 times [2021-06-05 16:07:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:54,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563629282] [2021-06-05 16:07:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:55,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:55,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563629282] [2021-06-05 16:07:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563629282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:55,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493626006] [2021-06-05 16:07:55,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:55,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:07:55,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:55,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:07:55,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:55,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 16:07:55,147 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 32 treesize of output 24 [2021-06-05 16:07:55,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:55,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:54 [2021-06-05 16:07:55,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:07:55,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:55,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-06-05 16:07:55,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:07:55,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:55,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:55,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:07:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493626006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:55,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:55,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:07:55,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700397401] [2021-06-05 16:07:55,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:07:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:07:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:07:55,235 INFO L87 Difference]: Start difference. First operand 8909 states and 33026 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:55,714 INFO L93 Difference]: Finished difference Result 9049 states and 33440 transitions. [2021-06-05 16:07:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:07:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:55,730 INFO L225 Difference]: With dead ends: 9049 [2021-06-05 16:07:55,730 INFO L226 Difference]: Without dead ends: 9034 [2021-06-05 16:07:55,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:07:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-06-05 16:07:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 8928. [2021-06-05 16:07:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 3.706956424330682) internal successors, (33092), 8927 states have internal predecessors, (33092), 0 states have call successors, (0), 0 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 16:07:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 33092 transitions. [2021-06-05 16:07:55,858 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 33092 transitions. Word has length 28 [2021-06-05 16:07:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:55,858 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 33092 transitions. [2021-06-05 16:07:55,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 33092 transitions. [2021-06-05 16:07:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:55,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:55,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:56,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 16:07:56,071 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash -990845068, now seen corresponding path program 41 times [2021-06-05 16:07:56,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:56,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734784357] [2021-06-05 16:07:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:56,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734784357] [2021-06-05 16:07:56,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734784357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:56,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225328492] [2021-06-05 16:07:56,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:56,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:07:56,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:56,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:56,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:56,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:56,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:56,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:56,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:07:56,482 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_55], 2=[A]} [2021-06-05 16:07:56,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:07:56,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:56,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:56,491 INFO L518 ElimStorePlain]: Eliminatee v_C_55 vanished before elimination [2021-06-05 16:07:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:56,494 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 33 treesize of output 21 [2021-06-05 16:07:56,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:56,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:56,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:56,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:07:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225328492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:56,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:56,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:56,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565483132] [2021-06-05 16:07:56,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:56,513 INFO L87 Difference]: Start difference. First operand 8928 states and 33092 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:57,139 INFO L93 Difference]: Finished difference Result 12009 states and 43453 transitions. [2021-06-05 16:07:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:07:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:57,161 INFO L225 Difference]: With dead ends: 12009 [2021-06-05 16:07:57,161 INFO L226 Difference]: Without dead ends: 11969 [2021-06-05 16:07:57,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 442.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:07:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11969 states. [2021-06-05 16:07:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11969 to 8969. [2021-06-05 16:07:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8968 states have (on average 3.704504906333631) internal successors, (33222), 8968 states have internal predecessors, (33222), 0 states have call successors, (0), 0 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 16:07:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 33222 transitions. [2021-06-05 16:07:57,298 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 33222 transitions. Word has length 28 [2021-06-05 16:07:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:57,299 INFO L482 AbstractCegarLoop]: Abstraction has 8969 states and 33222 transitions. [2021-06-05 16:07:57,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 33222 transitions. [2021-06-05 16:07:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:57,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:57,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:57,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:57,511 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1275724212, now seen corresponding path program 42 times [2021-06-05 16:07:57,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:57,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92180871] [2021-06-05 16:07:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:57,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:57,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92180871] [2021-06-05 16:07:57,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92180871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:57,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518702888] [2021-06-05 16:07:57,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:57,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:07:57,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:07:57,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:57,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:57,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:57,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 16:07:57,878 INFO L446 ElimStorePlain]: Different costs {0=[v_C_57], 2=[A]} [2021-06-05 16:07:57,881 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 24 treesize of output 20 [2021-06-05 16:07:57,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:57,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:57,901 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 39 treesize of output 27 [2021-06-05 16:07:57,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:57,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:35 [2021-06-05 16:07:57,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:57,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 16:07:57,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:57,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:57,973 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 16:07:57,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:103 [2021-06-05 16:07:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518702888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:58,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 16:07:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485950481] [2021-06-05 16:07:58,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:07:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:07:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:07:58,067 INFO L87 Difference]: Start difference. First operand 8969 states and 33222 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:58,692 INFO L93 Difference]: Finished difference Result 12084 states and 43680 transitions. [2021-06-05 16:07:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:07:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:58,711 INFO L225 Difference]: With dead ends: 12084 [2021-06-05 16:07:58,711 INFO L226 Difference]: Without dead ends: 12025 [2021-06-05 16:07:58,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:07:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12025 states. [2021-06-05 16:07:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12025 to 9008. [2021-06-05 16:07:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.7008993005440214) internal successors, (33334), 9007 states have internal predecessors, (33334), 0 states have call successors, (0), 0 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 16:07:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 33334 transitions. [2021-06-05 16:07:58,834 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 33334 transitions. Word has length 28 [2021-06-05 16:07:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:58,834 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 33334 transitions. [2021-06-05 16:07:58,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:58,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 33334 transitions. [2021-06-05 16:07:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:07:58,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:58,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:59,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 16:07:59,053 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1941430964, now seen corresponding path program 43 times [2021-06-05 16:07:59,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:59,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004251750] [2021-06-05 16:07:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:59,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004251750] [2021-06-05 16:07:59,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004251750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148142278] [2021-06-05 16:07:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:59,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:07:59,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:59,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:07:59,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:59,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:07:59,357 INFO L446 ElimStorePlain]: Different costs {0=[v_C_59], 3=[A]} [2021-06-05 16:07:59,360 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 28 treesize of output 24 [2021-06-05 16:07:59,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:59,374 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 43 treesize of output 29 [2021-06-05 16:07:59,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:59,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 16:07:59,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:07:59,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:59,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:59,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:07:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148142278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:59,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:59,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:07:59,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516457812] [2021-06-05 16:07:59,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:07:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:07:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:07:59,449 INFO L87 Difference]: Start difference. First operand 9008 states and 33334 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:59,930 INFO L93 Difference]: Finished difference Result 12059 states and 43607 transitions. [2021-06-05 16:07:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:07:59,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:07:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:59,949 INFO L225 Difference]: With dead ends: 12059 [2021-06-05 16:07:59,949 INFO L226 Difference]: Without dead ends: 12033 [2021-06-05 16:07:59,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12033 states. [2021-06-05 16:08:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12033 to 9023. [2021-06-05 16:08:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9023 states, 9022 states have (on average 3.7005098647749946) internal successors, (33386), 9022 states have internal predecessors, (33386), 0 states have call successors, (0), 0 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 16:08:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 33386 transitions. [2021-06-05 16:08:00,075 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 33386 transitions. Word has length 28 [2021-06-05 16:08:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:00,075 INFO L482 AbstractCegarLoop]: Abstraction has 9023 states and 33386 transitions. [2021-06-05 16:08:00,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 33386 transitions. [2021-06-05 16:08:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:00,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:00,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:00,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 16:08:00,287 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash 664331920, now seen corresponding path program 44 times [2021-06-05 16:08:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:00,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217049940] [2021-06-05 16:08:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:00,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:00,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217049940] [2021-06-05 16:08:00,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217049940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:00,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173378636] [2021-06-05 16:08:00,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:00,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:00,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:00,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:08:00,684 INFO L446 ElimStorePlain]: Different costs {0=[B, v_C_61], 2=[A]} [2021-06-05 16:08:00,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:00,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,697 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 18 treesize of output 14 [2021-06-05 16:08:00,698 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:00,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:00,707 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 33 treesize of output 21 [2021-06-05 16:08:00,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:00,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:00,712 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:00,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173378636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:00,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:00,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:00,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465459512] [2021-06-05 16:08:00,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:00,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:00,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:00,725 INFO L87 Difference]: Start difference. First operand 9023 states and 33386 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:01,254 INFO L93 Difference]: Finished difference Result 12089 states and 43695 transitions. [2021-06-05 16:08:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:08:01,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:01,274 INFO L225 Difference]: With dead ends: 12089 [2021-06-05 16:08:01,274 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 16:08:01,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:08:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 16:08:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 9037. [2021-06-05 16:08:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9037 states, 9036 states have (on average 3.699867197875166) internal successors, (33432), 9036 states have internal predecessors, (33432), 0 states have call successors, (0), 0 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 16:08:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9037 states to 9037 states and 33432 transitions. [2021-06-05 16:08:01,432 INFO L78 Accepts]: Start accepts. Automaton has 9037 states and 33432 transitions. Word has length 28 [2021-06-05 16:08:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:01,432 INFO L482 AbstractCegarLoop]: Abstraction has 9037 states and 33432 transitions. [2021-06-05 16:08:01,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:01,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9037 states and 33432 transitions. [2021-06-05 16:08:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:01,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:01,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:01,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 16:08:01,644 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1364066096, now seen corresponding path program 45 times [2021-06-05 16:08:01,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:01,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453325811] [2021-06-05 16:08:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:01,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453325811] [2021-06-05 16:08:01,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453325811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:01,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970683126] [2021-06-05 16:08:01,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:01,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:08:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:08:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:01,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:01,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:01,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:01,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:02,079 INFO L446 ElimStorePlain]: Different costs {0=[v_C_63], 3=[A]} [2021-06-05 16:08:02,081 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 28 treesize of output 24 [2021-06-05 16:08:02,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:02,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 16:08:02,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:02,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:91 [2021-06-05 16:08:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:02,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:02,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 16:08:02,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,241 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:08:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 10 [2021-06-05 16:08:02,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,261 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-06-05 16:08:02,261 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 24 treesize of output 25 [2021-06-05 16:08:02,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,270 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:08:02,270 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 48 treesize of output 1 [2021-06-05 16:08:02,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:02,348 INFO L628 ElimStorePlain]: treesize reduction 10, result has 91.8 percent of original size [2021-06-05 16:08:02,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:02,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:221 [2021-06-05 16:08:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:02,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970683126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:02,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:02,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 19 [2021-06-05 16:08:02,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910452033] [2021-06-05 16:08:02,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:08:02,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:08:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:02,509 INFO L87 Difference]: Start difference. First operand 9037 states and 33432 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:03,526 INFO L93 Difference]: Finished difference Result 12209 states and 44002 transitions. [2021-06-05 16:08:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:08:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:03,546 INFO L225 Difference]: With dead ends: 12209 [2021-06-05 16:08:03,546 INFO L226 Difference]: Without dead ends: 12097 [2021-06-05 16:08:03,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:08:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12097 states. [2021-06-05 16:08:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12097 to 9048. [2021-06-05 16:08:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9048 states, 9047 states have (on average 3.699458383994694) internal successors, (33469), 9047 states have internal predecessors, (33469), 0 states have call successors, (0), 0 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 16:08:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9048 states to 9048 states and 33469 transitions. [2021-06-05 16:08:03,674 INFO L78 Accepts]: Start accepts. Automaton has 9048 states and 33469 transitions. Word has length 28 [2021-06-05 16:08:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:03,675 INFO L482 AbstractCegarLoop]: Abstraction has 9048 states and 33469 transitions. [2021-06-05 16:08:03,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9048 states and 33469 transitions. [2021-06-05 16:08:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:03,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:03,687 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:03,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 16:08:03,887 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash -428132080, now seen corresponding path program 46 times [2021-06-05 16:08:03,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:03,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413976030] [2021-06-05 16:08:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:04,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413976030] [2021-06-05 16:08:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413976030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505731534] [2021-06-05 16:08:04,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:04,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:04,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:04,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:04,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:04,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:04,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 16:08:04,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:04,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:04,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:04,223 INFO L518 ElimStorePlain]: Eliminatee v_C_65 vanished before elimination [2021-06-05 16:08:04,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:08:04,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:04,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:04,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:04,227 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 16:08:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:04,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505731534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:04,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:04,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:04,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501607230] [2021-06-05 16:08:04,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:04,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:04,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:04,287 INFO L87 Difference]: Start difference. First operand 9048 states and 33469 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:08:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:05,118 INFO L93 Difference]: Finished difference Result 13380 states and 48064 transitions. [2021-06-05 16:08:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:08:05,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 16:08:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:05,140 INFO L225 Difference]: With dead ends: 13380 [2021-06-05 16:08:05,140 INFO L226 Difference]: Without dead ends: 13340 [2021-06-05 16:08:05,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:08:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13340 states. [2021-06-05 16:08:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 9063. [2021-06-05 16:08:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9063 states, 9062 states have (on average 3.699073052306334) internal successors, (33521), 9062 states have internal predecessors, (33521), 0 states have call successors, (0), 0 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 16:08:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9063 states to 9063 states and 33521 transitions. [2021-06-05 16:08:05,283 INFO L78 Accepts]: Start accepts. Automaton has 9063 states and 33521 transitions. Word has length 28 [2021-06-05 16:08:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:05,283 INFO L482 AbstractCegarLoop]: Abstraction has 9063 states and 33521 transitions. [2021-06-05 16:08:05,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:08:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9063 states and 33521 transitions. [2021-06-05 16:08:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:05,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:05,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:05,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:05,496 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash -297167724, now seen corresponding path program 47 times [2021-06-05 16:08:05,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:05,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503746110] [2021-06-05 16:08:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:05,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503746110] [2021-06-05 16:08:05,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503746110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271127702] [2021-06-05 16:08:05,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:05,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:08:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:08:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:05,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:05,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:05,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:05,819 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 24 treesize of output 20 [2021-06-05 16:08:05,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:05,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:05,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:05,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 16:08:05,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:08:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:05,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:05,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:08:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:05,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271127702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:05,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:05,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:05,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282040044] [2021-06-05 16:08:05,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:05,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:05,867 INFO L87 Difference]: Start difference. First operand 9063 states and 33521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:06,504 INFO L93 Difference]: Finished difference Result 12064 states and 43684 transitions. [2021-06-05 16:08:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:08:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:06,524 INFO L225 Difference]: With dead ends: 12064 [2021-06-05 16:08:06,524 INFO L226 Difference]: Without dead ends: 12049 [2021-06-05 16:08:06,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:08:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12049 states. [2021-06-05 16:08:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12049 to 9065. [2021-06-05 16:08:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9065 states, 9064 states have (on average 3.7009046778464256) internal successors, (33545), 9064 states have internal predecessors, (33545), 0 states have call successors, (0), 0 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 16:08:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 33545 transitions. [2021-06-05 16:08:06,651 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 33545 transitions. Word has length 28 [2021-06-05 16:08:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:06,651 INFO L482 AbstractCegarLoop]: Abstraction has 9065 states and 33545 transitions. [2021-06-05 16:08:06,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 33545 transitions. [2021-06-05 16:08:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:06,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:06,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:06,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 16:08:06,863 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash -831202636, now seen corresponding path program 48 times [2021-06-05 16:08:06,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:06,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016153857] [2021-06-05 16:08:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:07,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016153857] [2021-06-05 16:08:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016153857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164149294] [2021-06-05 16:08:07,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:07,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:08:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:07,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:07,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:07,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 16:08:07,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:07,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-06-05 16:08:07,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:07,250 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 42 treesize of output 24 [2021-06-05 16:08:07,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:07,259 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 16:08:07,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:35 [2021-06-05 16:08:07,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:07,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:07,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:07,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164149294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:07,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:07,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:07,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128545491] [2021-06-05 16:08:07,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:07,304 INFO L87 Difference]: Start difference. First operand 9065 states and 33545 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:07,605 INFO L93 Difference]: Finished difference Result 9201 states and 33924 transitions. [2021-06-05 16:08:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:07,620 INFO L225 Difference]: With dead ends: 9201 [2021-06-05 16:08:07,620 INFO L226 Difference]: Without dead ends: 9158 [2021-06-05 16:08:07,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9158 states. [2021-06-05 16:08:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9158 to 9080. [2021-06-05 16:08:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9079 states have (on average 3.699746668135257) internal successors, (33590), 9079 states have internal predecessors, (33590), 0 states have call successors, (0), 0 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 16:08:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 33590 transitions. [2021-06-05 16:08:07,729 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 33590 transitions. Word has length 28 [2021-06-05 16:08:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:07,729 INFO L482 AbstractCegarLoop]: Abstraction has 9080 states and 33590 transitions. [2021-06-05 16:08:07,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 33590 transitions. [2021-06-05 16:08:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:07,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:07,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:07,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 16:08:07,941 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:07,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:07,941 INFO L82 PathProgramCache]: Analyzing trace with hash 156288976, now seen corresponding path program 49 times [2021-06-05 16:08:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:07,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587841361] [2021-06-05 16:08:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:08,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:08,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587841361] [2021-06-05 16:08:08,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587841361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:08,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804713559] [2021-06-05 16:08:08,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:08,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:08,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:08,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:08:08,255 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 32 treesize of output 24 [2021-06-05 16:08:08,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:08,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:50 [2021-06-05 16:08:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:08,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:08,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 16:08:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:08,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:08,330 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 29 treesize of output 17 [2021-06-05 16:08:08,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:08,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:08,337 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 16:08:08,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:08:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:08,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804713559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:08,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:08,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542720903] [2021-06-05 16:08:08,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:08,362 INFO L87 Difference]: Start difference. First operand 9080 states and 33590 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:08,669 INFO L93 Difference]: Finished difference Result 9194 states and 33912 transitions. [2021-06-05 16:08:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:08,684 INFO L225 Difference]: With dead ends: 9194 [2021-06-05 16:08:08,684 INFO L226 Difference]: Without dead ends: 9173 [2021-06-05 16:08:08,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9173 states. [2021-06-05 16:08:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9173 to 9083. [2021-06-05 16:08:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9083 states, 9082 states have (on average 3.700286280554944) internal successors, (33606), 9082 states have internal predecessors, (33606), 0 states have call successors, (0), 0 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 16:08:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9083 states to 9083 states and 33606 transitions. [2021-06-05 16:08:08,793 INFO L78 Accepts]: Start accepts. Automaton has 9083 states and 33606 transitions. Word has length 28 [2021-06-05 16:08:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:08,793 INFO L482 AbstractCegarLoop]: Abstraction has 9083 states and 33606 transitions. [2021-06-05 16:08:08,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9083 states and 33606 transitions. [2021-06-05 16:08:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:08,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:08,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:09,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 16:08:09,006 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:09,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2126766028, now seen corresponding path program 50 times [2021-06-05 16:08:09,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:09,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7425017] [2021-06-05 16:08:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:09,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:09,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7425017] [2021-06-05 16:08:09,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7425017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:09,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524010506] [2021-06-05 16:08:09,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:09,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:09,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:09,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:09,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:09,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:09,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:09,277 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 28 treesize of output 24 [2021-06-05 16:08:09,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:09,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-06-05 16:08:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:09,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:09,320 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 38 treesize of output 24 [2021-06-05 16:08:09,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:09,330 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 16:08:09,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:31 [2021-06-05 16:08:09,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:09,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:09,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:09,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:09,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524010506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:09,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:09,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:09,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269547294] [2021-06-05 16:08:09,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:09,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:09,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:09,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:09,403 INFO L87 Difference]: Start difference. First operand 9083 states and 33606 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:09,770 INFO L93 Difference]: Finished difference Result 9264 states and 34143 transitions. [2021-06-05 16:08:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:08:09,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:09,786 INFO L225 Difference]: With dead ends: 9264 [2021-06-05 16:08:09,786 INFO L226 Difference]: Without dead ends: 9249 [2021-06-05 16:08:09,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:08:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-06-05 16:08:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 9106. [2021-06-05 16:08:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9106 states, 9105 states have (on average 3.700164744645799) internal successors, (33690), 9105 states have internal predecessors, (33690), 0 states have call successors, (0), 0 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 16:08:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9106 states to 9106 states and 33690 transitions. [2021-06-05 16:08:09,924 INFO L78 Accepts]: Start accepts. Automaton has 9106 states and 33690 transitions. Word has length 28 [2021-06-05 16:08:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:09,924 INFO L482 AbstractCegarLoop]: Abstraction has 9106 states and 33690 transitions. [2021-06-05 16:08:09,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9106 states and 33690 transitions. [2021-06-05 16:08:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:09,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:09,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:10,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 16:08:10,137 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1959867984, now seen corresponding path program 51 times [2021-06-05 16:08:10,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:10,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978031141] [2021-06-05 16:08:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:10,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978031141] [2021-06-05 16:08:10,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978031141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930881923] [2021-06-05 16:08:10,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:08:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:08:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:10,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:10,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:10,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-06-05 16:08:10,427 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 24 treesize of output 20 [2021-06-05 16:08:10,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:10,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:10,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:49 [2021-06-05 16:08:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:10,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 16:08:10,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:10,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:10,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:78 [2021-06-05 16:08:10,841 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_10], 3=[v_prenex_9, B]} [2021-06-05 16:08:10,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 16:08:10,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:10,919 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-05 16:08:10,937 INFO L354 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2021-06-05 16:08:10,937 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 24 treesize of output 27 [2021-06-05 16:08:10,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:10,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 16:08:10,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:11,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:11,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:11,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:128, output treesize:163 [2021-06-05 16:08:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:11,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930881923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:11,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:11,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 19 [2021-06-05 16:08:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898540158] [2021-06-05 16:08:11,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:08:11,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:08:11,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:11,189 INFO L87 Difference]: Start difference. First operand 9106 states and 33690 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:12,335 INFO L93 Difference]: Finished difference Result 9329 states and 34311 transitions. [2021-06-05 16:08:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:08:12,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:12,351 INFO L225 Difference]: With dead ends: 9329 [2021-06-05 16:08:12,351 INFO L226 Difference]: Without dead ends: 9289 [2021-06-05 16:08:12,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:08:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2021-06-05 16:08:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 9121. [2021-06-05 16:08:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9121 states, 9120 states have (on average 3.699780701754386) internal successors, (33742), 9120 states have internal predecessors, (33742), 0 states have call successors, (0), 0 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 16:08:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 33742 transitions. [2021-06-05 16:08:12,467 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 33742 transitions. Word has length 28 [2021-06-05 16:08:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:12,467 INFO L482 AbstractCegarLoop]: Abstraction has 9121 states and 33742 transitions. [2021-06-05 16:08:12,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 33742 transitions. [2021-06-05 16:08:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:12,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:12,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:12,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 16:08:12,679 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:12,679 INFO L82 PathProgramCache]: Analyzing trace with hash -182048560, now seen corresponding path program 52 times [2021-06-05 16:08:12,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:12,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658541408] [2021-06-05 16:08:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:12,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658541408] [2021-06-05 16:08:12,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658541408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817226876] [2021-06-05 16:08:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:12,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:12,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:12,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:12,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:12,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:12,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:12,941 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 28 treesize of output 24 [2021-06-05 16:08:12,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:12,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:12,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:12,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:42 [2021-06-05 16:08:12,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:13,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:13,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:13,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:13,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 16:08:13,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:13,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:13,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 16:08:13,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:13,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:13,085 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 16:08:13,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:08:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:13,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817226876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:13,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:13,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:13,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900118440] [2021-06-05 16:08:13,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:13,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:13,107 INFO L87 Difference]: Start difference. First operand 9121 states and 33742 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:13,531 INFO L93 Difference]: Finished difference Result 9265 states and 34168 transitions. [2021-06-05 16:08:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:13,546 INFO L225 Difference]: With dead ends: 9265 [2021-06-05 16:08:13,546 INFO L226 Difference]: Without dead ends: 9250 [2021-06-05 16:08:13,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:08:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9250 states. [2021-06-05 16:08:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9250 to 9121. [2021-06-05 16:08:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9121 states, 9120 states have (on average 3.700438596491228) internal successors, (33748), 9120 states have internal predecessors, (33748), 0 states have call successors, (0), 0 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 16:08:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 33748 transitions. [2021-06-05 16:08:13,656 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 33748 transitions. Word has length 28 [2021-06-05 16:08:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:13,656 INFO L482 AbstractCegarLoop]: Abstraction has 9121 states and 33748 transitions. [2021-06-05 16:08:13,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 33748 transitions. [2021-06-05 16:08:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:13,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:13,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:13,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 16:08:13,881 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:13,881 INFO L82 PathProgramCache]: Analyzing trace with hash -853966448, now seen corresponding path program 53 times [2021-06-05 16:08:13,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:13,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936954074] [2021-06-05 16:08:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:14,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936954074] [2021-06-05 16:08:14,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936954074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:14,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769309560] [2021-06-05 16:08:14,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:14,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:08:14,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:14,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 16:08:14,187 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 24 treesize of output 20 [2021-06-05 16:08:14,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:14,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:08:14,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:14,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:14,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 16:08:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769309560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:14,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:14,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:14,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896286119] [2021-06-05 16:08:14,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:14,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:14,213 INFO L87 Difference]: Start difference. First operand 9121 states and 33748 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:08:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:15,252 INFO L93 Difference]: Finished difference Result 14558 states and 52026 transitions. [2021-06-05 16:08:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:08:15,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 28 [2021-06-05 16:08:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:15,276 INFO L225 Difference]: With dead ends: 14558 [2021-06-05 16:08:15,277 INFO L226 Difference]: Without dead ends: 14518 [2021-06-05 16:08:15,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:08:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14518 states. [2021-06-05 16:08:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14518 to 9108. [2021-06-05 16:08:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 3.701328648292522) internal successors, (33708), 9107 states have internal predecessors, (33708), 0 states have call successors, (0), 0 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 16:08:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 33708 transitions. [2021-06-05 16:08:15,428 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 33708 transitions. Word has length 28 [2021-06-05 16:08:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:15,428 INFO L482 AbstractCegarLoop]: Abstraction has 9108 states and 33708 transitions. [2021-06-05 16:08:15,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 16:08:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 33708 transitions. [2021-06-05 16:08:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:15,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:15,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:15,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:15,640 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1306725904, now seen corresponding path program 54 times [2021-06-05 16:08:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:15,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876754641] [2021-06-05 16:08:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876754641] [2021-06-05 16:08:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876754641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996921713] [2021-06-05 16:08:15,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:15,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:08:15,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:15,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:15,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:15,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:15,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:15,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:08:15,972 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 24 treesize of output 20 [2021-06-05 16:08:15,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:15,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:15,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:15,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2021-06-05 16:08:16,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:16,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:16,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:16,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:16,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 16:08:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:08:16,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:16,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:16,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:16,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:08:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:16,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996921713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:16,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:16,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:16,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804468850] [2021-06-05 16:08:16,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:16,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:16,058 INFO L87 Difference]: Start difference. First operand 9108 states and 33708 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:16,360 INFO L93 Difference]: Finished difference Result 9311 states and 34276 transitions. [2021-06-05 16:08:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:08:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:16,376 INFO L225 Difference]: With dead ends: 9311 [2021-06-05 16:08:16,376 INFO L226 Difference]: Without dead ends: 9286 [2021-06-05 16:08:16,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:08:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-06-05 16:08:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 9100. [2021-06-05 16:08:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 3.7015056599626335) internal successors, (33680), 9099 states have internal predecessors, (33680), 0 states have call successors, (0), 0 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 16:08:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 33680 transitions. [2021-06-05 16:08:16,515 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 33680 transitions. Word has length 28 [2021-06-05 16:08:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:16,515 INFO L482 AbstractCegarLoop]: Abstraction has 9100 states and 33680 transitions. [2021-06-05 16:08:16,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 33680 transitions. [2021-06-05 16:08:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:16,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:16,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:16,728 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash 177676160, now seen corresponding path program 55 times [2021-06-05 16:08:16,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:16,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246586796] [2021-06-05 16:08:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:16,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246586796] [2021-06-05 16:08:16,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246586796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870900948] [2021-06-05 16:08:16,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:17,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:17,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:17,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:17,120 INFO L446 ElimStorePlain]: Different costs {0=[v_C_83], 2=[A]} [2021-06-05 16:08:17,122 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 24 treesize of output 20 [2021-06-05 16:08:17,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:17,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:17,135 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 34 treesize of output 22 [2021-06-05 16:08:17,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:17,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 16:08:17,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:17,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:17,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:17,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:17,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870900948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:17,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:17,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198339835] [2021-06-05 16:08:17,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:17,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:17,183 INFO L87 Difference]: Start difference. First operand 9100 states and 33680 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:17,824 INFO L93 Difference]: Finished difference Result 12212 states and 44108 transitions. [2021-06-05 16:08:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:08:17,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:17,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:17,845 INFO L225 Difference]: With dead ends: 12212 [2021-06-05 16:08:17,845 INFO L226 Difference]: Without dead ends: 12142 [2021-06-05 16:08:17,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:08:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2021-06-05 16:08:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 9080. [2021-06-05 16:08:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9080 states, 9079 states have (on average 3.702610419649741) internal successors, (33616), 9079 states have internal predecessors, (33616), 0 states have call successors, (0), 0 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 16:08:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9080 states to 9080 states and 33616 transitions. [2021-06-05 16:08:17,976 INFO L78 Accepts]: Start accepts. Automaton has 9080 states and 33616 transitions. Word has length 28 [2021-06-05 16:08:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:17,976 INFO L482 AbstractCegarLoop]: Abstraction has 9080 states and 33616 transitions. [2021-06-05 16:08:17,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9080 states and 33616 transitions. [2021-06-05 16:08:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:17,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:17,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:18,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:18,189 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1832853148, now seen corresponding path program 56 times [2021-06-05 16:08:18,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:18,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906092310] [2021-06-05 16:08:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:18,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:18,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906092310] [2021-06-05 16:08:18,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906092310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:18,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69447251] [2021-06-05 16:08:18,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:18,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:18,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:18,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:18,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:18,554 INFO L446 ElimStorePlain]: Different costs {0=[v_C_85], 2=[A]} [2021-06-05 16:08:18,556 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 24 treesize of output 20 [2021-06-05 16:08:18,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:18,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:18,568 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 39 treesize of output 27 [2021-06-05 16:08:18,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:18,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 16:08:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:18,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:18,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:18,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:18,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69447251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:18,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:18,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027458111] [2021-06-05 16:08:18,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:18,616 INFO L87 Difference]: Start difference. First operand 9080 states and 33616 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:19,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:19,159 INFO L93 Difference]: Finished difference Result 12188 states and 44009 transitions. [2021-06-05 16:08:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:08:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:19,179 INFO L225 Difference]: With dead ends: 12188 [2021-06-05 16:08:19,179 INFO L226 Difference]: Without dead ends: 12116 [2021-06-05 16:08:19,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:08:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2021-06-05 16:08:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 9060. [2021-06-05 16:08:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9060 states, 9059 states have (on average 3.704161607241417) internal successors, (33556), 9059 states have internal predecessors, (33556), 0 states have call successors, (0), 0 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 16:08:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9060 states to 9060 states and 33556 transitions. [2021-06-05 16:08:19,334 INFO L78 Accepts]: Start accepts. Automaton has 9060 states and 33556 transitions. Word has length 28 [2021-06-05 16:08:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:19,334 INFO L482 AbstractCegarLoop]: Abstraction has 9060 states and 33556 transitions. [2021-06-05 16:08:19,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 9060 states and 33556 transitions. [2021-06-05 16:08:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:19,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:19,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:19,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 16:08:19,547 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash 861819932, now seen corresponding path program 57 times [2021-06-05 16:08:19,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:19,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251981485] [2021-06-05 16:08:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:19,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251981485] [2021-06-05 16:08:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251981485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201086719] [2021-06-05 16:08:19,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:19,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:08:19,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:19,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:08:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:19,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:19,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:19,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:19,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 16:08:19,843 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 24 treesize of output 20 [2021-06-05 16:08:19,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:19,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:19,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:19,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:46 [2021-06-05 16:08:19,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:19,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:19,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 16:08:19,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:19,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:19,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:19,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:78 [2021-06-05 16:08:20,298 INFO L446 ElimStorePlain]: Different costs {0=[B], 2=[v_prenex_14, v_prenex_15]} [2021-06-05 16:08:20,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:20,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:20,352 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.9 percent of original size [2021-06-05 16:08:20,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:20,355 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 11 [2021-06-05 16:08:20,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:20,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:20,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:20,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:20,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:08:20,401 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:62 [2021-06-05 16:08:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:20,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201086719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:20,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:20,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:08:20,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369612433] [2021-06-05 16:08:20,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:08:20,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:20,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:08:20,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:08:20,458 INFO L87 Difference]: Start difference. First operand 9060 states and 33556 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:21,306 INFO L93 Difference]: Finished difference Result 9349 states and 34351 transitions. [2021-06-05 16:08:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:08:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:21,321 INFO L225 Difference]: With dead ends: 9349 [2021-06-05 16:08:21,321 INFO L226 Difference]: Without dead ends: 9309 [2021-06-05 16:08:21,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:08:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9309 states. [2021-06-05 16:08:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9309 to 9040. [2021-06-05 16:08:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9040 states, 9039 states have (on average 3.7059409226684368) internal successors, (33498), 9039 states have internal predecessors, (33498), 0 states have call successors, (0), 0 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 16:08:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 33498 transitions. [2021-06-05 16:08:21,429 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 33498 transitions. Word has length 28 [2021-06-05 16:08:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:21,430 INFO L482 AbstractCegarLoop]: Abstraction has 9040 states and 33498 transitions. [2021-06-05 16:08:21,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 33498 transitions. [2021-06-05 16:08:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:21,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:21,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:21,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:21,642 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash -23804464, now seen corresponding path program 58 times [2021-06-05 16:08:21,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:21,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358047778] [2021-06-05 16:08:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:21,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358047778] [2021-06-05 16:08:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358047778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700456851] [2021-06-05 16:08:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:21,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:21,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:21,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:21,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:21,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:21,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 16:08:21,956 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 24 treesize of output 20 [2021-06-05 16:08:21,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:21,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:21,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:21,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:08:21,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:21,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:21,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 16:08:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700456851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:21,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:21,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837761413] [2021-06-05 16:08:21,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:21,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:21,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:21,984 INFO L87 Difference]: Start difference. First operand 9040 states and 33498 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:22,975 INFO L93 Difference]: Finished difference Result 10525 states and 37719 transitions. [2021-06-05 16:08:22,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:08:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:22,992 INFO L225 Difference]: With dead ends: 10525 [2021-06-05 16:08:22,992 INFO L226 Difference]: Without dead ends: 10495 [2021-06-05 16:08:22,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:08:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-06-05 16:08:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 9117. [2021-06-05 16:08:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9117 states, 9116 states have (on average 3.703488372093023) internal successors, (33761), 9116 states have internal predecessors, (33761), 0 states have call successors, (0), 0 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 16:08:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9117 states to 9117 states and 33761 transitions. [2021-06-05 16:08:23,142 INFO L78 Accepts]: Start accepts. Automaton has 9117 states and 33761 transitions. Word has length 28 [2021-06-05 16:08:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:23,142 INFO L482 AbstractCegarLoop]: Abstraction has 9117 states and 33761 transitions. [2021-06-05 16:08:23,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 9117 states and 33761 transitions. [2021-06-05 16:08:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:23,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:23,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:23,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:23,354 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:23,355 INFO L82 PathProgramCache]: Analyzing trace with hash 600854544, now seen corresponding path program 59 times [2021-06-05 16:08:23,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:23,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568702231] [2021-06-05 16:08:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:23,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568702231] [2021-06-05 16:08:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568702231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067511165] [2021-06-05 16:08:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:23,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:08:23,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:23,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:23,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:23,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:23,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 16:08:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:23,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:23,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:08:23,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:23,690 INFO L518 ElimStorePlain]: Eliminatee v_C_91 vanished before elimination [2021-06-05 16:08:23,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:23,690 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:08:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:23,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067511165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:23,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:23,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:23,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724138995] [2021-06-05 16:08:23,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:23,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:23,707 INFO L87 Difference]: Start difference. First operand 9117 states and 33761 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:24,475 INFO L93 Difference]: Finished difference Result 10439 states and 37480 transitions. [2021-06-05 16:08:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:08:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:24,492 INFO L225 Difference]: With dead ends: 10439 [2021-06-05 16:08:24,492 INFO L226 Difference]: Without dead ends: 10382 [2021-06-05 16:08:24,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:08:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2021-06-05 16:08:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 9142. [2021-06-05 16:08:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 3.702111366371294) internal successors, (33841), 9141 states have internal predecessors, (33841), 0 states have call successors, (0), 0 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 16:08:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 33841 transitions. [2021-06-05 16:08:24,613 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 33841 transitions. Word has length 28 [2021-06-05 16:08:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:24,613 INFO L482 AbstractCegarLoop]: Abstraction has 9142 states and 33841 transitions. [2021-06-05 16:08:24,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 33841 transitions. [2021-06-05 16:08:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:24,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:24,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:24,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:24,826 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1427543472, now seen corresponding path program 60 times [2021-06-05 16:08:24,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:24,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200586839] [2021-06-05 16:08:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:24,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200586839] [2021-06-05 16:08:24,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200586839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:24,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785594530] [2021-06-05 16:08:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:24,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:08:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:08:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:25,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:25,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:25,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:25,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 16:08:25,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:25,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:25,156 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 18 treesize of output 14 [2021-06-05 16:08:25,157 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:25,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:25,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:25,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-06-05 16:08:25,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:25,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 16:08:25,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:25,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:25,219 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 16:08:25,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:55 [2021-06-05 16:08:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:25,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785594530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:25,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:25,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:08:25,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307862] [2021-06-05 16:08:25,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:08:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:08:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:08:25,265 INFO L87 Difference]: Start difference. First operand 9142 states and 33841 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:25,882 INFO L93 Difference]: Finished difference Result 9297 states and 34300 transitions. [2021-06-05 16:08:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:08:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:25,897 INFO L225 Difference]: With dead ends: 9297 [2021-06-05 16:08:25,897 INFO L226 Difference]: Without dead ends: 9282 [2021-06-05 16:08:25,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:08:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-06-05 16:08:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 9137. [2021-06-05 16:08:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9137 states, 9136 states have (on average 3.7039185639229424) internal successors, (33839), 9136 states have internal predecessors, (33839), 0 states have call successors, (0), 0 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 16:08:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9137 states to 9137 states and 33839 transitions. [2021-06-05 16:08:26,003 INFO L78 Accepts]: Start accepts. Automaton has 9137 states and 33839 transitions. Word has length 28 [2021-06-05 16:08:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:26,003 INFO L482 AbstractCegarLoop]: Abstraction has 9137 states and 33839 transitions. [2021-06-05 16:08:26,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9137 states and 33839 transitions. [2021-06-05 16:08:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:26,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:26,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:26,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 16:08:26,215 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1909688240, now seen corresponding path program 61 times [2021-06-05 16:08:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:26,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146180734] [2021-06-05 16:08:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:26,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146180734] [2021-06-05 16:08:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146180734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863224995] [2021-06-05 16:08:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:26,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:26,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:26,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:26,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:26,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:65 [2021-06-05 16:08:26,624 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_95], 2=[B]} [2021-06-05 16:08:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:26,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:26,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:26,633 INFO L518 ElimStorePlain]: Eliminatee v_C_95 vanished before elimination [2021-06-05 16:08:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:26,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:26,635 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 29 treesize of output 17 [2021-06-05 16:08:26,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:26,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:26,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:26,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:26,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863224995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:26,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:26,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753172241] [2021-06-05 16:08:26,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:26,654 INFO L87 Difference]: Start difference. First operand 9137 states and 33839 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:27,141 INFO L93 Difference]: Finished difference Result 11789 states and 42730 transitions. [2021-06-05 16:08:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:08:27,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:27,159 INFO L225 Difference]: With dead ends: 11789 [2021-06-05 16:08:27,159 INFO L226 Difference]: Without dead ends: 11764 [2021-06-05 16:08:27,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:08:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2021-06-05 16:08:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 9159. [2021-06-05 16:08:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9159 states, 9158 states have (on average 3.7034286962218825) internal successors, (33916), 9158 states have internal predecessors, (33916), 0 states have call successors, (0), 0 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 16:08:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9159 states to 9159 states and 33916 transitions. [2021-06-05 16:08:27,284 INFO L78 Accepts]: Start accepts. Automaton has 9159 states and 33916 transitions. Word has length 28 [2021-06-05 16:08:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:27,284 INFO L482 AbstractCegarLoop]: Abstraction has 9159 states and 33916 transitions. [2021-06-05 16:08:27,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9159 states and 33916 transitions. [2021-06-05 16:08:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:27,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:27,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:27,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:27,496 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -606993708, now seen corresponding path program 62 times [2021-06-05 16:08:27,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:27,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494342337] [2021-06-05 16:08:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:27,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494342337] [2021-06-05 16:08:27,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494342337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197719120] [2021-06-05 16:08:27,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:27,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:27,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:27,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:27,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:27,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:27,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:27,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-06-05 16:08:27,848 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_97], 2=[B]} [2021-06-05 16:08:27,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:27,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:27,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:27,860 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 18 treesize of output 14 [2021-06-05 16:08:27,861 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:27,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:27,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:27,870 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 33 treesize of output 21 [2021-06-05 16:08:27,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:27,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:27,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:27,875 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197719120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:27,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867134409] [2021-06-05 16:08:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:27,888 INFO L87 Difference]: Start difference. First operand 9159 states and 33916 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:28,288 INFO L93 Difference]: Finished difference Result 11705 states and 42498 transitions. [2021-06-05 16:08:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:08:28,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:28,307 INFO L225 Difference]: With dead ends: 11705 [2021-06-05 16:08:28,307 INFO L226 Difference]: Without dead ends: 11644 [2021-06-05 16:08:28,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11644 states. [2021-06-05 16:08:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11644 to 9176. [2021-06-05 16:08:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9176 states, 9175 states have (on average 3.701907356948229) internal successors, (33965), 9175 states have internal predecessors, (33965), 0 states have call successors, (0), 0 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 16:08:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 33965 transitions. [2021-06-05 16:08:28,429 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 33965 transitions. Word has length 28 [2021-06-05 16:08:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:28,429 INFO L482 AbstractCegarLoop]: Abstraction has 9176 states and 33965 transitions. [2021-06-05 16:08:28,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 33965 transitions. [2021-06-05 16:08:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:28,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:28,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:28,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:28,641 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 460880856, now seen corresponding path program 63 times [2021-06-05 16:08:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:28,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115433955] [2021-06-05 16:08:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:28,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115433955] [2021-06-05 16:08:28,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115433955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:28,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105637319] [2021-06-05 16:08:28,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:28,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:08:28,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:28,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:28,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:28,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:28,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 16:08:28,950 INFO L446 ElimStorePlain]: Different costs {0=[v_C_99], 2=[B]} [2021-06-05 16:08:28,952 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 24 treesize of output 20 [2021-06-05 16:08:28,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:28,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:28,965 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 34 treesize of output 22 [2021-06-05 16:08:28,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:28,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,974 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 16:08:28,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:28,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:28,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:28,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105637319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460324324] [2021-06-05 16:08:29,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:29,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:29,019 INFO L87 Difference]: Start difference. First operand 9176 states and 33965 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:29,434 INFO L93 Difference]: Finished difference Result 11742 states and 42631 transitions. [2021-06-05 16:08:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:08:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:29,454 INFO L225 Difference]: With dead ends: 11742 [2021-06-05 16:08:29,454 INFO L226 Difference]: Without dead ends: 11717 [2021-06-05 16:08:29,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:08:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-06-05 16:08:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 9163. [2021-06-05 16:08:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9163 states, 9162 states have (on average 3.7049770792403405) internal successors, (33945), 9162 states have internal predecessors, (33945), 0 states have call successors, (0), 0 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 16:08:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 33945 transitions. [2021-06-05 16:08:29,643 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 33945 transitions. Word has length 28 [2021-06-05 16:08:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:29,643 INFO L482 AbstractCegarLoop]: Abstraction has 9163 states and 33945 transitions. [2021-06-05 16:08:29,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 33945 transitions. [2021-06-05 16:08:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:29,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:29,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:29,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 16:08:29,856 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1581531380, now seen corresponding path program 64 times [2021-06-05 16:08:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:29,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566913984] [2021-06-05 16:08:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:30,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566913984] [2021-06-05 16:08:30,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566913984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848246853] [2021-06-05 16:08:30,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:08:30,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:30,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:08:30,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:30,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:08:30,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:30,236 INFO L518 ElimStorePlain]: Eliminatee v_C_101 vanished before elimination [2021-06-05 16:08:30,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:30,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:08:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:30,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848246853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:30,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:30,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:30,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611135331] [2021-06-05 16:08:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:30,249 INFO L87 Difference]: Start difference. First operand 9163 states and 33945 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:30,854 INFO L93 Difference]: Finished difference Result 12047 states and 43561 transitions. [2021-06-05 16:08:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:08:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:30,873 INFO L225 Difference]: With dead ends: 12047 [2021-06-05 16:08:30,874 INFO L226 Difference]: Without dead ends: 11964 [2021-06-05 16:08:30,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:08:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11964 states. [2021-06-05 16:08:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11964 to 9281. [2021-06-05 16:08:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9280 states have (on average 3.6988146551724137) internal successors, (34325), 9280 states have internal predecessors, (34325), 0 states have call successors, (0), 0 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 16:08:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 34325 transitions. [2021-06-05 16:08:30,996 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 34325 transitions. Word has length 28 [2021-06-05 16:08:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:30,996 INFO L482 AbstractCegarLoop]: Abstraction has 9281 states and 34325 transitions. [2021-06-05 16:08:30,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 34325 transitions. [2021-06-05 16:08:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:31,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:31,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:31,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:31,208 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:31,208 INFO L82 PathProgramCache]: Analyzing trace with hash -446866636, now seen corresponding path program 65 times [2021-06-05 16:08:31,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:31,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308123386] [2021-06-05 16:08:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:31,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:31,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308123386] [2021-06-05 16:08:31,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308123386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:31,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772893142] [2021-06-05 16:08:31,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:31,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:08:31,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:31,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:31,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 16:08:31,562 INFO L446 ElimStorePlain]: Different costs {0=[v_C_103], 1=[A]} [2021-06-05 16:08:31,565 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 32 treesize of output 24 [2021-06-05 16:08:31,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:08:31,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:31,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 16:08:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:08:31,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:31,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:31,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:08:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772893142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:31,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:31,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:31,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053512419] [2021-06-05 16:08:31,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:31,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:31,617 INFO L87 Difference]: Start difference. First operand 9281 states and 34325 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:31,852 INFO L93 Difference]: Finished difference Result 9379 states and 34583 transitions. [2021-06-05 16:08:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:08:31,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:31,867 INFO L225 Difference]: With dead ends: 9379 [2021-06-05 16:08:31,867 INFO L226 Difference]: Without dead ends: 9353 [2021-06-05 16:08:31,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2021-06-05 16:08:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 9272. [2021-06-05 16:08:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9272 states, 9271 states have (on average 3.7013267177219284) internal successors, (34315), 9271 states have internal predecessors, (34315), 0 states have call successors, (0), 0 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 16:08:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 34315 transitions. [2021-06-05 16:08:31,974 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 34315 transitions. Word has length 28 [2021-06-05 16:08:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:31,974 INFO L482 AbstractCegarLoop]: Abstraction has 9272 states and 34315 transitions. [2021-06-05 16:08:31,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 34315 transitions. [2021-06-05 16:08:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:31,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:31,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:32,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:32,187 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1373198096, now seen corresponding path program 66 times [2021-06-05 16:08:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:32,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118644355] [2021-06-05 16:08:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:32,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118644355] [2021-06-05 16:08:32,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118644355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752992192] [2021-06-05 16:08:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:32,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:08:32,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:08:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:32,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:32,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:32,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:32,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 16:08:32,553 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_105], 2=[B]} [2021-06-05 16:08:32,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:32,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:32,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:32,562 INFO L518 ElimStorePlain]: Eliminatee v_C_105 vanished before elimination [2021-06-05 16:08:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:32,564 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 33 treesize of output 21 [2021-06-05 16:08:32,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:32,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:32,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:32,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:32,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752992192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:32,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:32,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:32,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396052557] [2021-06-05 16:08:32,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:32,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:32,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:32,583 INFO L87 Difference]: Start difference. First operand 9272 states and 34315 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:32,907 INFO L93 Difference]: Finished difference Result 11800 states and 42865 transitions. [2021-06-05 16:08:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:08:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:32,927 INFO L225 Difference]: With dead ends: 11800 [2021-06-05 16:08:32,928 INFO L226 Difference]: Without dead ends: 11737 [2021-06-05 16:08:32,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-06-05 16:08:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 9283. [2021-06-05 16:08:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9283 states, 9282 states have (on average 3.6996336996337) internal successors, (34340), 9282 states have internal predecessors, (34340), 0 states have call successors, (0), 0 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 16:08:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9283 states to 9283 states and 34340 transitions. [2021-06-05 16:08:33,078 INFO L78 Accepts]: Start accepts. Automaton has 9283 states and 34340 transitions. Word has length 28 [2021-06-05 16:08:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:33,079 INFO L482 AbstractCegarLoop]: Abstraction has 9283 states and 34340 transitions. [2021-06-05 16:08:33,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 9283 states and 34340 transitions. [2021-06-05 16:08:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:33,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:33,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:33,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 16:08:33,291 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1504162452, now seen corresponding path program 67 times [2021-06-05 16:08:33,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:33,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831429083] [2021-06-05 16:08:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:33,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:33,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831429083] [2021-06-05 16:08:33,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831429083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:33,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238005452] [2021-06-05 16:08:33,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:33,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:33,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:33,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:33,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 16:08:33,620 INFO L446 ElimStorePlain]: Different costs {0=[v_C_107], 2=[B]} [2021-06-05 16:08:33,622 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 24 treesize of output 20 [2021-06-05 16:08:33,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:33,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:33,637 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 39 treesize of output 27 [2021-06-05 16:08:33,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:33,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,648 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 16:08:33,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:33,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:33,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:33,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:33,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238005452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:33,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:33,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237815207] [2021-06-05 16:08:33,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:33,691 INFO L87 Difference]: Start difference. First operand 9283 states and 34340 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:34,125 INFO L93 Difference]: Finished difference Result 11829 states and 42932 transitions. [2021-06-05 16:08:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:08:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:34,144 INFO L225 Difference]: With dead ends: 11829 [2021-06-05 16:08:34,144 INFO L226 Difference]: Without dead ends: 11790 [2021-06-05 16:08:34,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:08:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11790 states. [2021-06-05 16:08:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11790 to 9282. [2021-06-05 16:08:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9282 states, 9281 states have (on average 3.7005710591531087) internal successors, (34345), 9281 states have internal predecessors, (34345), 0 states have call successors, (0), 0 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 16:08:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9282 states to 9282 states and 34345 transitions. [2021-06-05 16:08:34,265 INFO L78 Accepts]: Start accepts. Automaton has 9282 states and 34345 transitions. Word has length 28 [2021-06-05 16:08:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:34,265 INFO L482 AbstractCegarLoop]: Abstraction has 9282 states and 34345 transitions. [2021-06-05 16:08:34,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9282 states and 34345 transitions. [2021-06-05 16:08:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:34,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:34,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:34,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 16:08:34,477 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 970127540, now seen corresponding path program 68 times [2021-06-05 16:08:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:34,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846262594] [2021-06-05 16:08:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:34,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846262594] [2021-06-05 16:08:34,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846262594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:34,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643284842] [2021-06-05 16:08:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:34,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:34,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:34,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 16:08:34,747 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 24 treesize of output 20 [2021-06-05 16:08:34,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:34,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-06-05 16:08:34,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:34,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:34,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 16:08:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:34,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 16:08:34,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:34,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:34,844 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 16:08:34,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:08:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:34,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643284842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:34,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:34,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:34,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541692959] [2021-06-05 16:08:34,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:34,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:34,865 INFO L87 Difference]: Start difference. First operand 9282 states and 34345 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:35,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:35,217 INFO L93 Difference]: Finished difference Result 9436 states and 34801 transitions. [2021-06-05 16:08:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:08:35,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:35,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:35,233 INFO L225 Difference]: With dead ends: 9436 [2021-06-05 16:08:35,233 INFO L226 Difference]: Without dead ends: 9421 [2021-06-05 16:08:35,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9421 states. [2021-06-05 16:08:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9421 to 9297. [2021-06-05 16:08:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9297 states, 9296 states have (on average 3.7001936316695354) internal successors, (34397), 9296 states have internal predecessors, (34397), 0 states have call successors, (0), 0 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 16:08:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9297 states to 9297 states and 34397 transitions. [2021-06-05 16:08:35,342 INFO L78 Accepts]: Start accepts. Automaton has 9297 states and 34397 transitions. Word has length 28 [2021-06-05 16:08:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:35,342 INFO L482 AbstractCegarLoop]: Abstraction has 9297 states and 34397 transitions. [2021-06-05 16:08:35,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9297 states and 34397 transitions. [2021-06-05 16:08:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:35,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:35,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:35,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:08:35,555 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1957619152, now seen corresponding path program 69 times [2021-06-05 16:08:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:35,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464842364] [2021-06-05 16:08:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:35,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:35,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464842364] [2021-06-05 16:08:35,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464842364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:35,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117471200] [2021-06-05 16:08:35,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:35,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:08:35,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:08:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:35,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:35,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:35,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:35,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:08:35,861 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 24 treesize of output 20 [2021-06-05 16:08:35,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:35,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:35,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:35,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:51 [2021-06-05 16:08:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:35,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:35,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 16:08:35,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:35,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:35,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:35,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:78 [2021-06-05 16:08:36,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:36,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:36,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 16:08:36,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:36,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:36,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:36,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-06-05 16:08:36,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:36,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:36,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:36,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:36,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:36,079 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:08:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:08:36,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:36,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:36,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:36,137 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.3 percent of original size [2021-06-05 16:08:36,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:08:36,138 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:226, output treesize:72 [2021-06-05 16:08:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:36,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117471200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:36,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:36,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:08:36,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276927709] [2021-06-05 16:08:36,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:08:36,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:08:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:08:36,281 INFO L87 Difference]: Start difference. First operand 9297 states and 34397 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:37,178 INFO L93 Difference]: Finished difference Result 9698 states and 35514 transitions. [2021-06-05 16:08:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:08:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:37,194 INFO L225 Difference]: With dead ends: 9698 [2021-06-05 16:08:37,194 INFO L226 Difference]: Without dead ends: 9648 [2021-06-05 16:08:37,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:08:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-06-05 16:08:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 9300. [2021-06-05 16:08:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9300 states, 9299 states have (on average 3.7007205075814604) internal successors, (34413), 9299 states have internal predecessors, (34413), 0 states have call successors, (0), 0 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 16:08:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9300 states to 9300 states and 34413 transitions. [2021-06-05 16:08:37,312 INFO L78 Accepts]: Start accepts. Automaton has 9300 states and 34413 transitions. Word has length 28 [2021-06-05 16:08:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:37,312 INFO L482 AbstractCegarLoop]: Abstraction has 9300 states and 34413 transitions. [2021-06-05 16:08:37,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9300 states and 34413 transitions. [2021-06-05 16:08:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:37,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:37,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:37,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:37,524 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1034979504, now seen corresponding path program 70 times [2021-06-05 16:08:37,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:37,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956208664] [2021-06-05 16:08:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:37,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956208664] [2021-06-05 16:08:37,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956208664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623886527] [2021-06-05 16:08:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:37,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:37,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:37,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:37,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:37,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:37,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:65 [2021-06-05 16:08:37,874 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_113], 2=[B]} [2021-06-05 16:08:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:37,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:37,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:37,882 INFO L518 ElimStorePlain]: Eliminatee v_C_113 vanished before elimination [2021-06-05 16:08:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:37,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:37,885 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 33 treesize of output 21 [2021-06-05 16:08:37,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:37,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:37,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:37,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:37,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623886527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:37,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:37,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:37,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306727787] [2021-06-05 16:08:37,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:37,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:37,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:37,905 INFO L87 Difference]: Start difference. First operand 9300 states and 34413 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:38,394 INFO L93 Difference]: Finished difference Result 12022 states and 43590 transitions. [2021-06-05 16:08:38,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:08:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:38,413 INFO L225 Difference]: With dead ends: 12022 [2021-06-05 16:08:38,413 INFO L226 Difference]: Without dead ends: 12007 [2021-06-05 16:08:38,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:08:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12007 states. [2021-06-05 16:08:38,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12007 to 9336. [2021-06-05 16:08:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.698018211033744) internal successors, (34521), 9335 states have internal predecessors, (34521), 0 states have call successors, (0), 0 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 16:08:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 34521 transitions. [2021-06-05 16:08:38,537 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 34521 transitions. Word has length 28 [2021-06-05 16:08:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:38,537 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 34521 transitions. [2021-06-05 16:08:38,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 34521 transitions. [2021-06-05 16:08:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:38,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:38,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:38,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 16:08:38,757 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash 267715028, now seen corresponding path program 71 times [2021-06-05 16:08:38,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:38,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589677625] [2021-06-05 16:08:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:38,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589677625] [2021-06-05 16:08:38,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589677625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:38,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128778826] [2021-06-05 16:08:38,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:38,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:08:38,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:39,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:39,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:39,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:39,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:39,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:64 [2021-06-05 16:08:39,129 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_115], 2=[B]} [2021-06-05 16:08:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:39,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:39,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:39,137 INFO L518 ElimStorePlain]: Eliminatee v_C_115 vanished before elimination [2021-06-05 16:08:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:39,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:39,139 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 33 treesize of output 21 [2021-06-05 16:08:39,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:39,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:39,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:39,145 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:39,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128778826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:39,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:39,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:39,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414637359] [2021-06-05 16:08:39,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:39,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:39,158 INFO L87 Difference]: Start difference. First operand 9336 states and 34521 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:39,549 INFO L93 Difference]: Finished difference Result 11944 states and 43338 transitions. [2021-06-05 16:08:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:08:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:39,568 INFO L225 Difference]: With dead ends: 11944 [2021-06-05 16:08:39,568 INFO L226 Difference]: Without dead ends: 11904 [2021-06-05 16:08:39,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11904 states. [2021-06-05 16:08:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11904 to 9350. [2021-06-05 16:08:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9350 states, 9349 states have (on average 3.697400791528506) internal successors, (34567), 9349 states have internal predecessors, (34567), 0 states have call successors, (0), 0 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 16:08:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9350 states to 9350 states and 34567 transitions. [2021-06-05 16:08:39,723 INFO L78 Accepts]: Start accepts. Automaton has 9350 states and 34567 transitions. Word has length 28 [2021-06-05 16:08:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:39,723 INFO L482 AbstractCegarLoop]: Abstraction has 9350 states and 34567 transitions. [2021-06-05 16:08:39,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 9350 states and 34567 transitions. [2021-06-05 16:08:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:39,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:39,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:39,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:39,936 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1335589592, now seen corresponding path program 72 times [2021-06-05 16:08:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:39,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889714243] [2021-06-05 16:08:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:40,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889714243] [2021-06-05 16:08:40,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889714243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:40,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052217536] [2021-06-05 16:08:40,105 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:40,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:08:40,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:08:40,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:40,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:40,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:40,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:40,244 INFO L446 ElimStorePlain]: Different costs {0=[v_C_117], 2=[B]} [2021-06-05 16:08:40,246 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 24 treesize of output 20 [2021-06-05 16:08:40,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:40,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 16:08:40,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:40,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:40,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:63 [2021-06-05 16:08:40,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 16:08:40,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:40,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:40,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:40,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:40,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,417 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:08:40,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:08:40,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:40,470 INFO L628 ElimStorePlain]: treesize reduction 11, result has 87.1 percent of original size [2021-06-05 16:08:40,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:08:40,471 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:189, output treesize:88 [2021-06-05 16:08:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:40,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052217536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:40,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:40,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 16:08:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171407536] [2021-06-05 16:08:40,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:08:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:08:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:08:40,579 INFO L87 Difference]: Start difference. First operand 9350 states and 34567 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:41,356 INFO L93 Difference]: Finished difference Result 12198 states and 44126 transitions. [2021-06-05 16:08:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:08:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:41,375 INFO L225 Difference]: With dead ends: 12198 [2021-06-05 16:08:41,375 INFO L226 Difference]: Without dead ends: 12183 [2021-06-05 16:08:41,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:08:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12183 states. [2021-06-05 16:08:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12183 to 9336. [2021-06-05 16:08:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9336 states, 9335 states have (on average 3.7001606855918587) internal successors, (34541), 9335 states have internal predecessors, (34541), 0 states have call successors, (0), 0 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 16:08:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9336 states to 9336 states and 34541 transitions. [2021-06-05 16:08:41,499 INFO L78 Accepts]: Start accepts. Automaton has 9336 states and 34541 transitions. Word has length 28 [2021-06-05 16:08:41,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:41,499 INFO L482 AbstractCegarLoop]: Abstraction has 9336 states and 34541 transitions. [2021-06-05 16:08:41,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9336 states and 34541 transitions. [2021-06-05 16:08:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:41,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:41,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:41,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:41,711 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1471768620, now seen corresponding path program 73 times [2021-06-05 16:08:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:41,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933468461] [2021-06-05 16:08:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933468461] [2021-06-05 16:08:41,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933468461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974092478] [2021-06-05 16:08:41,876 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:41,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:41,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:41,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:41,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:41,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:41,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:66 [2021-06-05 16:08:42,078 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_119], 2=[B]} [2021-06-05 16:08:42,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:42,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:42,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:42,088 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 18 treesize of output 14 [2021-06-05 16:08:42,089 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:42,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:42,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:42,097 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 33 treesize of output 21 [2021-06-05 16:08:42,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:42,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:42,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:42,102 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:42,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974092478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:42,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:42,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:42,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376814298] [2021-06-05 16:08:42,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:42,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:42,116 INFO L87 Difference]: Start difference. First operand 9336 states and 34541 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:42,550 INFO L93 Difference]: Finished difference Result 12007 states and 43570 transitions. [2021-06-05 16:08:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:08:42,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:42,569 INFO L225 Difference]: With dead ends: 12007 [2021-06-05 16:08:42,569 INFO L226 Difference]: Without dead ends: 11992 [2021-06-05 16:08:42,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11992 states. [2021-06-05 16:08:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11992 to 9366. [2021-06-05 16:08:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9366 states, 9365 states have (on average 3.6985584623598506) internal successors, (34637), 9365 states have internal predecessors, (34637), 0 states have call successors, (0), 0 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 16:08:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9366 states to 9366 states and 34637 transitions. [2021-06-05 16:08:42,692 INFO L78 Accepts]: Start accepts. Automaton has 9366 states and 34637 transitions. Word has length 28 [2021-06-05 16:08:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:42,692 INFO L482 AbstractCegarLoop]: Abstraction has 9366 states and 34637 transitions. [2021-06-05 16:08:42,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 9366 states and 34637 transitions. [2021-06-05 16:08:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:42,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:42,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:42,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:42,905 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:42,905 INFO L82 PathProgramCache]: Analyzing trace with hash -403894056, now seen corresponding path program 74 times [2021-06-05 16:08:42,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:42,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353744089] [2021-06-05 16:08:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:43,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353744089] [2021-06-05 16:08:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353744089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:43,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865636473] [2021-06-05 16:08:43,124 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:43,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:43,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:43,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:43,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:43,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:54 [2021-06-05 16:08:43,285 INFO L446 ElimStorePlain]: Different costs {0=[v_C_121], 2=[B]} [2021-06-05 16:08:43,287 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 24 treesize of output 20 [2021-06-05 16:08:43,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:43,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:43,299 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 34 treesize of output 22 [2021-06-05 16:08:43,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:43,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 16:08:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:43,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:43,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:43,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:43,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865636473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:43,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:43,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418076005] [2021-06-05 16:08:43,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:43,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:43,346 INFO L87 Difference]: Start difference. First operand 9366 states and 34637 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:43,758 INFO L93 Difference]: Finished difference Result 12078 states and 43780 transitions. [2021-06-05 16:08:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:08:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:43,777 INFO L225 Difference]: With dead ends: 12078 [2021-06-05 16:08:43,777 INFO L226 Difference]: Without dead ends: 12056 [2021-06-05 16:08:43,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-05 16:08:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 9373. [2021-06-05 16:08:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9373 states, 9372 states have (on average 3.698997012377294) internal successors, (34667), 9372 states have internal predecessors, (34667), 0 states have call successors, (0), 0 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 16:08:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9373 states to 9373 states and 34667 transitions. [2021-06-05 16:08:43,900 INFO L78 Accepts]: Start accepts. Automaton has 9373 states and 34667 transitions. Word has length 28 [2021-06-05 16:08:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:43,901 INFO L482 AbstractCegarLoop]: Abstraction has 9373 states and 34667 transitions. [2021-06-05 16:08:43,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 9373 states and 34667 transitions. [2021-06-05 16:08:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:43,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:43,913 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:44,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:44,113 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2061160488, now seen corresponding path program 75 times [2021-06-05 16:08:44,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:44,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651868661] [2021-06-05 16:08:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:44,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651868661] [2021-06-05 16:08:44,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651868661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810700716] [2021-06-05 16:08:44,268 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:44,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:08:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:44,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:08:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:44,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:44,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:44,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-06-05 16:08:44,411 INFO L446 ElimStorePlain]: Different costs {0=[v_C_123], 3=[B]} [2021-06-05 16:08:44,413 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 24 treesize of output 20 [2021-06-05 16:08:44,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:44,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2021-06-05 16:08:44,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:08:44,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:64 [2021-06-05 16:08:44,734 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, v_prenex_17], 2=[A, v_prenex_18]} [2021-06-05 16:08:44,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:44,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,797 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.4 percent of original size [2021-06-05 16:08:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:08:44,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:44,831 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 11 [2021-06-05 16:08:44,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:44,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:44,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:44,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:44,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:08:44,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:126, output treesize:72 [2021-06-05 16:08:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:44,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810700716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:44,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:44,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:08:44,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340568977] [2021-06-05 16:08:44,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:08:44,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:08:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:08:44,976 INFO L87 Difference]: Start difference. First operand 9373 states and 34667 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:45,432 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:08:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:46,163 INFO L93 Difference]: Finished difference Result 12303 states and 44482 transitions. [2021-06-05 16:08:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:08:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:46,183 INFO L225 Difference]: With dead ends: 12303 [2021-06-05 16:08:46,183 INFO L226 Difference]: Without dead ends: 12288 [2021-06-05 16:08:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:08:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12288 states. [2021-06-05 16:08:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12288 to 9397. [2021-06-05 16:08:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9397 states, 9396 states have (on average 3.6978501489995743) internal successors, (34745), 9396 states have internal predecessors, (34745), 0 states have call successors, (0), 0 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 16:08:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9397 states to 9397 states and 34745 transitions. [2021-06-05 16:08:46,311 INFO L78 Accepts]: Start accepts. Automaton has 9397 states and 34745 transitions. Word has length 28 [2021-06-05 16:08:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:46,311 INFO L482 AbstractCegarLoop]: Abstraction has 9397 states and 34745 transitions. [2021-06-05 16:08:46,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 9397 states and 34745 transitions. [2021-06-05 16:08:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:46,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:46,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:46,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 16:08:46,524 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2103940680, now seen corresponding path program 76 times [2021-06-05 16:08:46,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:46,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928842019] [2021-06-05 16:08:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:46,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:46,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928842019] [2021-06-05 16:08:46,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928842019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:46,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727189769] [2021-06-05 16:08:46,783 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:46,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:46,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:46,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:46,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:46,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:46,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:46,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:46,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:46,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:46,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:46,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:08:46,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:46,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:46,959 INFO L518 ElimStorePlain]: Eliminatee v_C_125 vanished before elimination [2021-06-05 16:08:46,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:46,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:08:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727189769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:46,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:46,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130078758] [2021-06-05 16:08:46,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:46,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:46,974 INFO L87 Difference]: Start difference. First operand 9397 states and 34745 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:47,600 INFO L93 Difference]: Finished difference Result 12054 states and 43712 transitions. [2021-06-05 16:08:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:08:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:47,621 INFO L225 Difference]: With dead ends: 12054 [2021-06-05 16:08:47,621 INFO L226 Difference]: Without dead ends: 12012 [2021-06-05 16:08:47,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:08:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12012 states. [2021-06-05 16:08:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12012 to 9422. [2021-06-05 16:08:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9422 states, 9421 states have (on average 3.6964228850440506) internal successors, (34824), 9421 states have internal predecessors, (34824), 0 states have call successors, (0), 0 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 16:08:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9422 states to 9422 states and 34824 transitions. [2021-06-05 16:08:47,748 INFO L78 Accepts]: Start accepts. Automaton has 9422 states and 34824 transitions. Word has length 28 [2021-06-05 16:08:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:47,748 INFO L482 AbstractCegarLoop]: Abstraction has 9422 states and 34824 transitions. [2021-06-05 16:08:47,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9422 states and 34824 transitions. [2021-06-05 16:08:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:47,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:47,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:47,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:47,961 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash 162628600, now seen corresponding path program 77 times [2021-06-05 16:08:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:47,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623697984] [2021-06-05 16:08:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:48,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:48,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623697984] [2021-06-05 16:08:48,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623697984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:48,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764428187] [2021-06-05 16:08:48,147 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:48,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:08:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:48,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:48,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 16:08:48,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:48,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:48,281 INFO L518 ElimStorePlain]: Eliminatee v_C_127 vanished before elimination [2021-06-05 16:08:48,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 16:08:48,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:08:48,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:48,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:48,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:08:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764428187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:48,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:48,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:08:48,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616002344] [2021-06-05 16:08:48,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:48,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:48,318 INFO L87 Difference]: Start difference. First operand 9422 states and 34824 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:48,653 INFO L93 Difference]: Finished difference Result 9555 states and 35217 transitions. [2021-06-05 16:08:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:08:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:48,669 INFO L225 Difference]: With dead ends: 9555 [2021-06-05 16:08:48,669 INFO L226 Difference]: Without dead ends: 9540 [2021-06-05 16:08:48,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:08:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2021-06-05 16:08:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 9410. [2021-06-05 16:08:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9410 states, 9409 states have (on average 3.697736210011691) internal successors, (34792), 9409 states have internal predecessors, (34792), 0 states have call successors, (0), 0 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 16:08:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 34792 transitions. [2021-06-05 16:08:48,784 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 34792 transitions. Word has length 28 [2021-06-05 16:08:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:48,784 INFO L482 AbstractCegarLoop]: Abstraction has 9410 states and 34792 transitions. [2021-06-05 16:08:48,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 34792 transitions. [2021-06-05 16:08:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:48,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:48,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:48,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:48,997 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1982693332, now seen corresponding path program 78 times [2021-06-05 16:08:48,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:48,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214643672] [2021-06-05 16:08:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:49,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:49,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214643672] [2021-06-05 16:08:49,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214643672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:49,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514034428] [2021-06-05 16:08:49,212 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:49,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:08:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:08:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:49,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:49,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:49,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:49,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:49,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 16:08:49,472 INFO L446 ElimStorePlain]: Different costs {0=[v_C_129], 2=[A], 3=[B]} [2021-06-05 16:08:49,475 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 24 treesize of output 20 [2021-06-05 16:08:49,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:49,502 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.7 percent of original size [2021-06-05 16:08:49,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:49,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:08:49,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:49,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:49,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:49,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:49,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 64 [2021-06-05 16:08:49,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:08:49,616 INFO L628 ElimStorePlain]: treesize reduction 129, result has 28.7 percent of original size [2021-06-05 16:08:49,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:49,623 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:73, output treesize:81 [2021-06-05 16:08:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:49,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514034428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:49,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:49,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 16:08:49,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968487694] [2021-06-05 16:08:49,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:08:49,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:49,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:08:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:08:49,689 INFO L87 Difference]: Start difference. First operand 9410 states and 34792 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:50,749 INFO L93 Difference]: Finished difference Result 12166 states and 43946 transitions. [2021-06-05 16:08:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:08:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:50,768 INFO L225 Difference]: With dead ends: 12166 [2021-06-05 16:08:50,768 INFO L226 Difference]: Without dead ends: 12037 [2021-06-05 16:08:50,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 834.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:08:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12037 states. [2021-06-05 16:08:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12037 to 9451. [2021-06-05 16:08:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9451 states, 9450 states have (on average 3.693650793650794) internal successors, (34905), 9450 states have internal predecessors, (34905), 0 states have call successors, (0), 0 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 16:08:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9451 states to 9451 states and 34905 transitions. [2021-06-05 16:08:50,892 INFO L78 Accepts]: Start accepts. Automaton has 9451 states and 34905 transitions. Word has length 28 [2021-06-05 16:08:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:50,892 INFO L482 AbstractCegarLoop]: Abstraction has 9451 states and 34905 transitions. [2021-06-05 16:08:50,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 9451 states and 34905 transitions. [2021-06-05 16:08:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:50,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:50,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:51,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:51,105 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1821506156, now seen corresponding path program 79 times [2021-06-05 16:08:51,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:51,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892391436] [2021-06-05 16:08:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:51,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892391436] [2021-06-05 16:08:51,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892391436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354545637] [2021-06-05 16:08:51,323 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:51,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:51,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:51,489 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_131], 2=[B]} [2021-06-05 16:08:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:51,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,497 INFO L518 ElimStorePlain]: Eliminatee v_C_131 vanished before elimination [2021-06-05 16:08:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:51,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:51,499 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 33 treesize of output 21 [2021-06-05 16:08:51,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:51,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:51,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354545637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:51,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:51,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376272227] [2021-06-05 16:08:51,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:51,522 INFO L87 Difference]: Start difference. First operand 9451 states and 34905 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:52,073 INFO L93 Difference]: Finished difference Result 13163 states and 47420 transitions. [2021-06-05 16:08:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:08:52,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:52,095 INFO L225 Difference]: With dead ends: 13163 [2021-06-05 16:08:52,095 INFO L226 Difference]: Without dead ends: 13095 [2021-06-05 16:08:52,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:08:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-05 16:08:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 9433. [2021-06-05 16:08:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9432 states have (on average 3.695186598812553) internal successors, (34853), 9432 states have internal predecessors, (34853), 0 states have call successors, (0), 0 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 16:08:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 34853 transitions. [2021-06-05 16:08:52,226 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 34853 transitions. Word has length 28 [2021-06-05 16:08:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:52,226 INFO L482 AbstractCegarLoop]: Abstraction has 9433 states and 34853 transitions. [2021-06-05 16:08:52,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 34853 transitions. [2021-06-05 16:08:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:52,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:52,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:52,438 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2113657688, now seen corresponding path program 80 times [2021-06-05 16:08:52,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:52,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918203852] [2021-06-05 16:08:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:52,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918203852] [2021-06-05 16:08:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918203852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335829097] [2021-06-05 16:08:52,656 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:52,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:52,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:52,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:52,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:52,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:52,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:52,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:52,796 INFO L446 ElimStorePlain]: Different costs {0=[v_C_133], 2=[B]} [2021-06-05 16:08:52,798 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 24 treesize of output 20 [2021-06-05 16:08:52,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:52,810 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 34 treesize of output 22 [2021-06-05 16:08:52,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:52,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:56, output treesize:29 [2021-06-05 16:08:52,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:52,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:52,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:52,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335829097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:52,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:52,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:52,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161801978] [2021-06-05 16:08:52,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:52,865 INFO L87 Difference]: Start difference. First operand 9433 states and 34853 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:53,318 INFO L93 Difference]: Finished difference Result 12075 states and 43753 transitions. [2021-06-05 16:08:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:08:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:53,339 INFO L225 Difference]: With dead ends: 12075 [2021-06-05 16:08:53,340 INFO L226 Difference]: Without dead ends: 12036 [2021-06-05 16:08:53,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:08:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12036 states. [2021-06-05 16:08:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12036 to 9428. [2021-06-05 16:08:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.696403946112231) internal successors, (34846), 9427 states have internal predecessors, (34846), 0 states have call successors, (0), 0 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 16:08:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 34846 transitions. [2021-06-05 16:08:53,542 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 34846 transitions. Word has length 28 [2021-06-05 16:08:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:53,542 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 34846 transitions. [2021-06-05 16:08:53,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 34846 transitions. [2021-06-05 16:08:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:53,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:53,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:53,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 16:08:53,754 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1579622776, now seen corresponding path program 81 times [2021-06-05 16:08:53,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:53,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291301426] [2021-06-05 16:08:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:53,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:53,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291301426] [2021-06-05 16:08:53,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291301426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:53,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430236822] [2021-06-05 16:08:53,946 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:53,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:08:53,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:08:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:53,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:53,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:54,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:54,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:54,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-06-05 16:08:54,067 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 24 treesize of output 20 [2021-06-05 16:08:54,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:54,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:54,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:54,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:43 [2021-06-05 16:08:54,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 16:08:54,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:08:54,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:54,137 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 16:08:54,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:74 [2021-06-05 16:08:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:54,194 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 29 treesize of output 17 [2021-06-05 16:08:54,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:54,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:54,199 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 16:08:54,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:08:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:54,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430236822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:54,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:54,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:08:54,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075109907] [2021-06-05 16:08:54,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:08:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:08:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:54,216 INFO L87 Difference]: Start difference. First operand 9428 states and 34846 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:54,695 INFO L93 Difference]: Finished difference Result 9532 states and 35120 transitions. [2021-06-05 16:08:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:54,710 INFO L225 Difference]: With dead ends: 9532 [2021-06-05 16:08:54,710 INFO L226 Difference]: Without dead ends: 9510 [2021-06-05 16:08:54,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:08:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2021-06-05 16:08:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 9445. [2021-06-05 16:08:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9445 states, 9444 states have (on average 3.6954680220245657) internal successors, (34900), 9444 states have internal predecessors, (34900), 0 states have call successors, (0), 0 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 16:08:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9445 states to 9445 states and 34900 transitions. [2021-06-05 16:08:54,824 INFO L78 Accepts]: Start accepts. Automaton has 9445 states and 34900 transitions. Word has length 28 [2021-06-05 16:08:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:54,824 INFO L482 AbstractCegarLoop]: Abstraction has 9445 states and 34900 transitions. [2021-06-05 16:08:54,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9445 states and 34900 transitions. [2021-06-05 16:08:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:54,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:54,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:55,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:55,037 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash -37910004, now seen corresponding path program 82 times [2021-06-05 16:08:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:55,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298211171] [2021-06-05 16:08:55,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:55,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298211171] [2021-06-05 16:08:55,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298211171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:55,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780009654] [2021-06-05 16:08:55,237 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:55,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:08:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:55,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:55,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:55,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 16:08:55,344 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 24 treesize of output 20 [2021-06-05 16:08:55,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:55,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:40 [2021-06-05 16:08:55,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:08:55,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:55,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 16:08:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:55,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:55,406 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 29 treesize of output 17 [2021-06-05 16:08:55,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:55,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:55,412 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 16:08:55,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:08:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:55,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780009654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:55,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:55,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:55,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172594019] [2021-06-05 16:08:55,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:55,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:55,432 INFO L87 Difference]: Start difference. First operand 9445 states and 34900 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:55,745 INFO L93 Difference]: Finished difference Result 9627 states and 35407 transitions. [2021-06-05 16:08:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:55,760 INFO L225 Difference]: With dead ends: 9627 [2021-06-05 16:08:55,761 INFO L226 Difference]: Without dead ends: 9605 [2021-06-05 16:08:55,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-06-05 16:08:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 9443. [2021-06-05 16:08:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.696038974793476) internal successors, (34898), 9442 states have internal predecessors, (34898), 0 states have call successors, (0), 0 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 16:08:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 34898 transitions. [2021-06-05 16:08:55,871 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 34898 transitions. Word has length 28 [2021-06-05 16:08:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:55,872 INFO L482 AbstractCegarLoop]: Abstraction has 9443 states and 34898 transitions. [2021-06-05 16:08:55,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 34898 transitions. [2021-06-05 16:08:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:55,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:55,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:56,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 16:08:56,084 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1727852908, now seen corresponding path program 83 times [2021-06-05 16:08:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:56,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882687135] [2021-06-05 16:08:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:56,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882687135] [2021-06-05 16:08:56,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882687135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:56,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767331362] [2021-06-05 16:08:56,271 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:56,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:08:56,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:56,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:56,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 16:08:56,380 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 24 treesize of output 20 [2021-06-05 16:08:56,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:56,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:50 [2021-06-05 16:08:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:56,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:56,416 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 40 treesize of output 28 [2021-06-05 16:08:56,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:56,426 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 16:08:56,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:37 [2021-06-05 16:08:56,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:56,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:56,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:56,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767331362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:56,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:56,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155235210] [2021-06-05 16:08:56,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:56,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:56,468 INFO L87 Difference]: Start difference. First operand 9443 states and 34898 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:56,746 INFO L93 Difference]: Finished difference Result 9589 states and 35291 transitions. [2021-06-05 16:08:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:08:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:56,760 INFO L225 Difference]: With dead ends: 9589 [2021-06-05 16:08:56,760 INFO L226 Difference]: Without dead ends: 9552 [2021-06-05 16:08:56,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:08:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9552 states. [2021-06-05 16:08:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9552 to 9442. [2021-06-05 16:08:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9442 states, 9441 states have (on average 3.6972778307382694) internal successors, (34906), 9441 states have internal predecessors, (34906), 0 states have call successors, (0), 0 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 16:08:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 34906 transitions. [2021-06-05 16:08:56,870 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 34906 transitions. Word has length 28 [2021-06-05 16:08:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:56,870 INFO L482 AbstractCegarLoop]: Abstraction has 9442 states and 34906 transitions. [2021-06-05 16:08:56,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 34906 transitions. [2021-06-05 16:08:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:56,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:56,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:57,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:57,082 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1624520208, now seen corresponding path program 84 times [2021-06-05 16:08:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:57,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346031441] [2021-06-05 16:08:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:57,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346031441] [2021-06-05 16:08:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346031441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016846197] [2021-06-05 16:08:57,262 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:57,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:08:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:08:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:57,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:57,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:57,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:57,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:57,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 16:08:57,459 INFO L446 ElimStorePlain]: Different costs {0=[A, v_C_141], 2=[B]} [2021-06-05 16:08:57,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:08:57,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:57,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:57,467 INFO L518 ElimStorePlain]: Eliminatee v_C_141 vanished before elimination [2021-06-05 16:08:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:57,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:57,469 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 33 treesize of output 21 [2021-06-05 16:08:57,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:57,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:57,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:57,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:11 [2021-06-05 16:08:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:57,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016846197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:57,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:57,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:57,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774468333] [2021-06-05 16:08:57,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:57,488 INFO L87 Difference]: Start difference. First operand 9442 states and 34906 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:57,967 INFO L93 Difference]: Finished difference Result 12096 states and 43869 transitions. [2021-06-05 16:08:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:08:57,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:57,986 INFO L225 Difference]: With dead ends: 12096 [2021-06-05 16:08:57,986 INFO L226 Difference]: Without dead ends: 12054 [2021-06-05 16:08:57,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:08:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-05 16:08:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 9468. [2021-06-05 16:08:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9468 states, 9467 states have (on average 3.695785359670434) internal successors, (34988), 9467 states have internal predecessors, (34988), 0 states have call successors, (0), 0 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 16:08:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9468 states to 9468 states and 34988 transitions. [2021-06-05 16:08:58,112 INFO L78 Accepts]: Start accepts. Automaton has 9468 states and 34988 transitions. Word has length 28 [2021-06-05 16:08:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:58,112 INFO L482 AbstractCegarLoop]: Abstraction has 9468 states and 34988 transitions. [2021-06-05 16:08:58,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9468 states and 34988 transitions. [2021-06-05 16:08:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:58,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:58,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:58,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 16:08:58,325 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1755484564, now seen corresponding path program 85 times [2021-06-05 16:08:58,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:58,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903277559] [2021-06-05 16:08:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:58,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903277559] [2021-06-05 16:08:58,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903277559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:58,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116074093] [2021-06-05 16:08:58,503 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:58,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:08:58,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:58,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 16:08:58,649 INFO L446 ElimStorePlain]: Different costs {0=[v_C_143], 2=[B]} [2021-06-05 16:08:58,651 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 24 treesize of output 20 [2021-06-05 16:08:58,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:58,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:58,664 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 39 treesize of output 27 [2021-06-05 16:08:58,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:58,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:31 [2021-06-05 16:08:58,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:58,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:58,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:58,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:58,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116074093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:58,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:58,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:58,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462064351] [2021-06-05 16:08:58,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:58,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:58,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:58,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:58,712 INFO L87 Difference]: Start difference. First operand 9468 states and 34988 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:08:59,156 INFO L93 Difference]: Finished difference Result 12147 states and 44003 transitions. [2021-06-05 16:08:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:08:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:08:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:08:59,175 INFO L225 Difference]: With dead ends: 12147 [2021-06-05 16:08:59,176 INFO L226 Difference]: Without dead ends: 12116 [2021-06-05 16:08:59,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:08:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12116 states. [2021-06-05 16:08:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12116 to 9463. [2021-06-05 16:08:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9463 states, 9462 states have (on average 3.6972098922003807) internal successors, (34983), 9462 states have internal predecessors, (34983), 0 states have call successors, (0), 0 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 16:08:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9463 states to 9463 states and 34983 transitions. [2021-06-05 16:08:59,302 INFO L78 Accepts]: Start accepts. Automaton has 9463 states and 34983 transitions. Word has length 28 [2021-06-05 16:08:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:08:59,302 INFO L482 AbstractCegarLoop]: Abstraction has 9463 states and 34983 transitions. [2021-06-05 16:08:59,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:08:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 9463 states and 34983 transitions. [2021-06-05 16:08:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:08:59,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:08:59,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:08:59,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 16:08:59,515 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:08:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:08:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash -194926700, now seen corresponding path program 86 times [2021-06-05 16:08:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:08:59,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087977094] [2021-06-05 16:08:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:08:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:08:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:59,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:08:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087977094] [2021-06-05 16:08:59,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087977094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875244217] [2021-06-05 16:08:59,690 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:08:59,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:08:59,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:08:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:08:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:08:59,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:08:59,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:59,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-06-05 16:08:59,812 INFO L446 ElimStorePlain]: Different costs {0=[v_C_145], 2=[B]} [2021-06-05 16:08:59,814 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 24 treesize of output 20 [2021-06-05 16:08:59,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:08:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:08:59,826 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 39 treesize of output 27 [2021-06-05 16:08:59,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:59,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,834 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:27 [2021-06-05 16:08:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:08:59,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:08:59,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:08:59,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:08:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:08:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875244217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:08:59,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:08:59,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:08:59,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596850182] [2021-06-05 16:08:59,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:08:59,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:08:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:08:59,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:08:59,943 INFO L87 Difference]: Start difference. First operand 9463 states and 34983 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:00,416 INFO L93 Difference]: Finished difference Result 12168 states and 44090 transitions. [2021-06-05 16:09:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:09:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:00,435 INFO L225 Difference]: With dead ends: 12168 [2021-06-05 16:09:00,435 INFO L226 Difference]: Without dead ends: 12140 [2021-06-05 16:09:00,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:09:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12140 states. [2021-06-05 16:09:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12140 to 9475. [2021-06-05 16:09:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9475 states, 9474 states have (on average 3.696748997255647) internal successors, (35023), 9474 states have internal predecessors, (35023), 0 states have call successors, (0), 0 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 16:09:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 35023 transitions. [2021-06-05 16:09:00,558 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 35023 transitions. Word has length 28 [2021-06-05 16:09:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:00,558 INFO L482 AbstractCegarLoop]: Abstraction has 9475 states and 35023 transitions. [2021-06-05 16:09:00,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 35023 transitions. [2021-06-05 16:09:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:00,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:00,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:00,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:00,770 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 604414584, now seen corresponding path program 87 times [2021-06-05 16:09:00,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:00,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937177210] [2021-06-05 16:09:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:00,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937177210] [2021-06-05 16:09:00,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937177210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130290758] [2021-06-05 16:09:00,942 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:00,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:09:00,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:09:00,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:00,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:01,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:01,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:01,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 16:09:01,045 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 24 treesize of output 20 [2021-06-05 16:09:01,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:01,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:01,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:01,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:51 [2021-06-05 16:09:01,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 16:09:01,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:01,148 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 16:09:01,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:74 [2021-06-05 16:09:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:01,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:01,206 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 29 treesize of output 17 [2021-06-05 16:09:01,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:01,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:01,211 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 16:09:01,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:09:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130290758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:09:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222818431] [2021-06-05 16:09:01,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:01,228 INFO L87 Difference]: Start difference. First operand 9475 states and 35023 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:01,646 INFO L93 Difference]: Finished difference Result 9586 states and 35334 transitions. [2021-06-05 16:09:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:09:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:01,662 INFO L225 Difference]: With dead ends: 9586 [2021-06-05 16:09:01,662 INFO L226 Difference]: Without dead ends: 9571 [2021-06-05 16:09:01,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:09:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9571 states. [2021-06-05 16:09:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9571 to 9494. [2021-06-05 16:09:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.695670494048246) internal successors, (35083), 9493 states have internal predecessors, (35083), 0 states have call successors, (0), 0 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 16:09:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 35083 transitions. [2021-06-05 16:09:01,773 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 35083 transitions. Word has length 28 [2021-06-05 16:09:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:01,773 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 35083 transitions. [2021-06-05 16:09:01,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 35083 transitions. [2021-06-05 16:09:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:01,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:01,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:01,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:01,985 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1013118196, now seen corresponding path program 88 times [2021-06-05 16:09:01,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:01,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607828550] [2021-06-05 16:09:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607828550] [2021-06-05 16:09:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607828550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45450809] [2021-06-05 16:09:02,171 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:02,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:02,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:02,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:02,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:02,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:02,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 16:09:02,264 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 24 treesize of output 20 [2021-06-05 16:09:02,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:02,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 16:09:02,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:02,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:02,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:27 [2021-06-05 16:09:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:02,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:02,354 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 29 treesize of output 17 [2021-06-05 16:09:02,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:02,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:02,359 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 16:09:02,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 16:09:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:02,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45450809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:02,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:02,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:09:02,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419533317] [2021-06-05 16:09:02,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:09:02,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:09:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:09:02,380 INFO L87 Difference]: Start difference. First operand 9494 states and 35083 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:02,789 INFO L93 Difference]: Finished difference Result 9693 states and 35665 transitions. [2021-06-05 16:09:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:09:02,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:02,805 INFO L225 Difference]: With dead ends: 9693 [2021-06-05 16:09:02,805 INFO L226 Difference]: Without dead ends: 9678 [2021-06-05 16:09:02,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2021-06-05 16:09:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 9499. [2021-06-05 16:09:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9499 states, 9498 states have (on average 3.6949884186144453) internal successors, (35095), 9498 states have internal predecessors, (35095), 0 states have call successors, (0), 0 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 16:09:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9499 states to 9499 states and 35095 transitions. [2021-06-05 16:09:02,924 INFO L78 Accepts]: Start accepts. Automaton has 9499 states and 35095 transitions. Word has length 28 [2021-06-05 16:09:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:02,924 INFO L482 AbstractCegarLoop]: Abstraction has 9499 states and 35095 transitions. [2021-06-05 16:09:02,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9499 states and 35095 transitions. [2021-06-05 16:09:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:02,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:02,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:03,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 16:09:03,137 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1591906196, now seen corresponding path program 89 times [2021-06-05 16:09:03,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:03,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139086735] [2021-06-05 16:09:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:03,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139086735] [2021-06-05 16:09:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139086735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140080746] [2021-06-05 16:09:03,365 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:03,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:09:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:09:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:03,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:03,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 16:09:03,454 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 24 treesize of output 20 [2021-06-05 16:09:03,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:03,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 16:09:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:03,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:03,512 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 34 treesize of output 22 [2021-06-05 16:09:03,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:03,520 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 16:09:03,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:29 [2021-06-05 16:09:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:09:03,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:03,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:03,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:09:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140080746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:03,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:09:03,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992277680] [2021-06-05 16:09:03,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:09:03,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:09:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:09:03,563 INFO L87 Difference]: Start difference. First operand 9499 states and 35095 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:03,907 INFO L93 Difference]: Finished difference Result 9645 states and 35504 transitions. [2021-06-05 16:09:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:09:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:03,923 INFO L225 Difference]: With dead ends: 9645 [2021-06-05 16:09:03,923 INFO L226 Difference]: Without dead ends: 9620 [2021-06-05 16:09:03,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9620 states. [2021-06-05 16:09:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9620 to 9494. [2021-06-05 16:09:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9494 states, 9493 states have (on average 3.6965132202675655) internal successors, (35091), 9493 states have internal predecessors, (35091), 0 states have call successors, (0), 0 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 16:09:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9494 states to 9494 states and 35091 transitions. [2021-06-05 16:09:04,043 INFO L78 Accepts]: Start accepts. Automaton has 9494 states and 35091 transitions. Word has length 28 [2021-06-05 16:09:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:04,043 INFO L482 AbstractCegarLoop]: Abstraction has 9494 states and 35091 transitions. [2021-06-05 16:09:04,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9494 states and 35091 transitions. [2021-06-05 16:09:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:04,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:04,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:04,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 16:09:04,256 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -218520368, now seen corresponding path program 90 times [2021-06-05 16:09:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:04,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581085298] [2021-06-05 16:09:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:04,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:04,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581085298] [2021-06-05 16:09:04,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581085298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:04,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71419844] [2021-06-05 16:09:04,434 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:04,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:09:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:04,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:04,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:04,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 16:09:04,537 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 24 treesize of output 20 [2021-06-05 16:09:04,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:04,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:46 [2021-06-05 16:09:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:04,579 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 36 treesize of output 24 [2021-06-05 16:09:04,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:04,589 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 16:09:04,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:31 [2021-06-05 16:09:04,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:09:04,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:04,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:04,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2021-06-05 16:09:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71419844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:04,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 16:09:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689523186] [2021-06-05 16:09:04,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:09:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:09:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:09:04,648 INFO L87 Difference]: Start difference. First operand 9494 states and 35091 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:05,010 INFO L93 Difference]: Finished difference Result 9647 states and 35544 transitions. [2021-06-05 16:09:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:09:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:05,027 INFO L225 Difference]: With dead ends: 9647 [2021-06-05 16:09:05,028 INFO L226 Difference]: Without dead ends: 9632 [2021-06-05 16:09:05,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:09:05,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-06-05 16:09:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 9502. [2021-06-05 16:09:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9502 states, 9501 states have (on average 3.6969792653404903) internal successors, (35125), 9501 states have internal predecessors, (35125), 0 states have call successors, (0), 0 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 16:09:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9502 states to 9502 states and 35125 transitions. [2021-06-05 16:09:05,143 INFO L78 Accepts]: Start accepts. Automaton has 9502 states and 35125 transitions. Word has length 28 [2021-06-05 16:09:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 9502 states and 35125 transitions. [2021-06-05 16:09:05,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 9502 states and 35125 transitions. [2021-06-05 16:09:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:05,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:05,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:05,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:05,356 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:05,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 618524472, now seen corresponding path program 91 times [2021-06-05 16:09:05,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:05,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303373760] [2021-06-05 16:09:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:05,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:05,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303373760] [2021-06-05 16:09:05,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303373760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:05,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020181266] [2021-06-05 16:09:05,494 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:05,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:05,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:05,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:05,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:05,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:05,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:05,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:05,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:09:05,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:05,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:05,685 INFO L518 ElimStorePlain]: Eliminatee v_C_155 vanished before elimination [2021-06-05 16:09:05,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:05,686 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 16:09:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:05,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020181266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:05,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:05,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:05,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138944956] [2021-06-05 16:09:05,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:05,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:05,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:05,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:05,699 INFO L87 Difference]: Start difference. First operand 9502 states and 35125 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:06,766 INFO L93 Difference]: Finished difference Result 10930 states and 39178 transitions. [2021-06-05 16:09:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:09:06,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:06,783 INFO L225 Difference]: With dead ends: 10930 [2021-06-05 16:09:06,783 INFO L226 Difference]: Without dead ends: 10915 [2021-06-05 16:09:06,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:09:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10915 states. [2021-06-05 16:09:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10915 to 9577. [2021-06-05 16:09:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9577 states, 9576 states have (on average 3.6940267335004178) internal successors, (35374), 9576 states have internal predecessors, (35374), 0 states have call successors, (0), 0 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 16:09:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9577 states to 9577 states and 35374 transitions. [2021-06-05 16:09:06,911 INFO L78 Accepts]: Start accepts. Automaton has 9577 states and 35374 transitions. Word has length 28 [2021-06-05 16:09:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:06,911 INFO L482 AbstractCegarLoop]: Abstraction has 9577 states and 35374 transitions. [2021-06-05 16:09:06,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9577 states and 35374 transitions. [2021-06-05 16:09:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:06,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:06,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:07,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 16:09:07,123 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1409873544, now seen corresponding path program 92 times [2021-06-05 16:09:07,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:07,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556345405] [2021-06-05 16:09:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:07,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:07,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556345405] [2021-06-05 16:09:07,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556345405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:07,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243134036] [2021-06-05 16:09:07,275 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:07,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:09:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:07,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:07,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:07,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:07,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:07,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:07,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:07,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:07,506 INFO L518 ElimStorePlain]: Eliminatee v_C_157 vanished before elimination [2021-06-05 16:09:07,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:07,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 16:09:07,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:07,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 16:09:07,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:07,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:07,559 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 16:09:07,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 16:09:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:07,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243134036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:07,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:07,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:09:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967222875] [2021-06-05 16:09:07,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:09:07,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:09:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:09:07,618 INFO L87 Difference]: Start difference. First operand 9577 states and 35374 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:09,571 INFO L93 Difference]: Finished difference Result 11439 states and 40569 transitions. [2021-06-05 16:09:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:09:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:09,590 INFO L225 Difference]: With dead ends: 11439 [2021-06-05 16:09:09,591 INFO L226 Difference]: Without dead ends: 11331 [2021-06-05 16:09:09,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1518.6ms TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:09:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11331 states. [2021-06-05 16:09:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11331 to 9640. [2021-06-05 16:09:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9640 states, 9639 states have (on average 3.691358024691358) internal successors, (35581), 9639 states have internal predecessors, (35581), 0 states have call successors, (0), 0 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 16:09:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9640 states to 9640 states and 35581 transitions. [2021-06-05 16:09:09,730 INFO L78 Accepts]: Start accepts. Automaton has 9640 states and 35581 transitions. Word has length 28 [2021-06-05 16:09:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:09,730 INFO L482 AbstractCegarLoop]: Abstraction has 9640 states and 35581 transitions. [2021-06-05 16:09:09,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9640 states and 35581 transitions. [2021-06-05 16:09:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:09,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:09,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:09,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:09,944 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash -744166792, now seen corresponding path program 93 times [2021-06-05 16:09:09,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:09,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528740217] [2021-06-05 16:09:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:10,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:10,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528740217] [2021-06-05 16:09:10,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528740217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:10,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400132211] [2021-06-05 16:09:10,076 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:10,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:09:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:10,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:10,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:10,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:10,221 INFO L446 ElimStorePlain]: Different costs {0=[v_C_159], 1=[A]} [2021-06-05 16:09:10,223 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 29 treesize of output 25 [2021-06-05 16:09:10,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:10,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 16:09:10,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:10,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-06-05 16:09:10,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:10,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:10,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:10,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:10,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400132211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:10,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:10,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544005689] [2021-06-05 16:09:10,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:10,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:10,290 INFO L87 Difference]: Start difference. First operand 9640 states and 35581 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:11,367 INFO L93 Difference]: Finished difference Result 10911 states and 39246 transitions. [2021-06-05 16:09:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:09:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:11,384 INFO L225 Difference]: With dead ends: 10911 [2021-06-05 16:09:11,384 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 16:09:11,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:09:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 16:09:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9663. [2021-06-05 16:09:11,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9663 states, 9662 states have (on average 3.6912647484992753) internal successors, (35665), 9662 states have internal predecessors, (35665), 0 states have call successors, (0), 0 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 16:09:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 35665 transitions. [2021-06-05 16:09:11,513 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 35665 transitions. Word has length 28 [2021-06-05 16:09:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:11,513 INFO L482 AbstractCegarLoop]: Abstraction has 9663 states and 35665 transitions. [2021-06-05 16:09:11,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 35665 transitions. [2021-06-05 16:09:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:11,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:11,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:11,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 16:09:11,727 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2021265836, now seen corresponding path program 94 times [2021-06-05 16:09:11,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:11,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120542828] [2021-06-05 16:09:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:11,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120542828] [2021-06-05 16:09:11,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120542828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:11,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712646426] [2021-06-05 16:09:11,875 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:11,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:11,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:11,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:11,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:11,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:11,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:11,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:11,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:12,054 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 24 treesize of output 20 [2021-06-05 16:09:12,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:12,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:12,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:12,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:12,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:12,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:12,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:12,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:12,067 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:09:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:12,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712646426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:12,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:12,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013492354] [2021-06-05 16:09:12,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:12,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:12,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:12,079 INFO L87 Difference]: Start difference. First operand 9663 states and 35665 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:12,885 INFO L93 Difference]: Finished difference Result 11554 states and 41074 transitions. [2021-06-05 16:09:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:09:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:12,903 INFO L225 Difference]: With dead ends: 11554 [2021-06-05 16:09:12,904 INFO L226 Difference]: Without dead ends: 11529 [2021-06-05 16:09:12,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:09:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11529 states. [2021-06-05 16:09:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11529 to 9689. [2021-06-05 16:09:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 9688 states have (on average 3.690132122213047) internal successors, (35750), 9688 states have internal predecessors, (35750), 0 states have call successors, (0), 0 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 16:09:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 35750 transitions. [2021-06-05 16:09:13,046 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 35750 transitions. Word has length 28 [2021-06-05 16:09:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:13,046 INFO L482 AbstractCegarLoop]: Abstraction has 9689 states and 35750 transitions. [2021-06-05 16:09:13,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 35750 transitions. [2021-06-05 16:09:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:13,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:13,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:13,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 16:09:13,261 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 245303444, now seen corresponding path program 95 times [2021-06-05 16:09:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:13,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626528908] [2021-06-05 16:09:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:13,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626528908] [2021-06-05 16:09:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626528908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57725330] [2021-06-05 16:09:13,426 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:13,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:09:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:13,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:13,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:13,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:13,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:13,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:13,580 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 18 treesize of output 14 [2021-06-05 16:09:13,581 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:09:13,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:13,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 16:09:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:13,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:13,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:13,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:13,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57725330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:13,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:13,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:13,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203778778] [2021-06-05 16:09:13,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:13,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:13,620 INFO L87 Difference]: Start difference. First operand 9689 states and 35750 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:14,036 INFO L93 Difference]: Finished difference Result 11327 states and 40556 transitions. [2021-06-05 16:09:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:14,054 INFO L225 Difference]: With dead ends: 11327 [2021-06-05 16:09:14,054 INFO L226 Difference]: Without dead ends: 11257 [2021-06-05 16:09:14,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:09:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-06-05 16:09:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 9680. [2021-06-05 16:09:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9680 states, 9679 states have (on average 3.69160037193925) internal successors, (35731), 9679 states have internal predecessors, (35731), 0 states have call successors, (0), 0 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 16:09:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9680 states to 9680 states and 35731 transitions. [2021-06-05 16:09:14,180 INFO L78 Accepts]: Start accepts. Automaton has 9680 states and 35731 transitions. Word has length 28 [2021-06-05 16:09:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:14,180 INFO L482 AbstractCegarLoop]: Abstraction has 9680 states and 35731 transitions. [2021-06-05 16:09:14,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 9680 states and 35731 transitions. [2021-06-05 16:09:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:14,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:14,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:14,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 16:09:14,392 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:14,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1181237460, now seen corresponding path program 96 times [2021-06-05 16:09:14,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:14,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526140265] [2021-06-05 16:09:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:14,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:14,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526140265] [2021-06-05 16:09:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526140265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:14,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274603081] [2021-06-05 16:09:14,524 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:14,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:09:14,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:14,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:14,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:14,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:14,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:14,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:14,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:14,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:14,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:14,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:09:14,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:14,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:14,723 INFO L518 ElimStorePlain]: Eliminatee v_C_165 vanished before elimination [2021-06-05 16:09:14,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:14,723 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:09:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:14,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274603081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:14,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:14,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:14,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824586653] [2021-06-05 16:09:14,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:14,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:14,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:14,737 INFO L87 Difference]: Start difference. First operand 9680 states and 35731 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:15,156 INFO L93 Difference]: Finished difference Result 10476 states and 38006 transitions. [2021-06-05 16:09:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:09:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:15,173 INFO L225 Difference]: With dead ends: 10476 [2021-06-05 16:09:15,173 INFO L226 Difference]: Without dead ends: 10461 [2021-06-05 16:09:15,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:09:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10461 states. [2021-06-05 16:09:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10461 to 9695. [2021-06-05 16:09:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9695 states, 9694 states have (on average 3.6912523210233132) internal successors, (35783), 9694 states have internal predecessors, (35783), 0 states have call successors, (0), 0 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 16:09:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9695 states to 9695 states and 35783 transitions. [2021-06-05 16:09:15,302 INFO L78 Accepts]: Start accepts. Automaton has 9695 states and 35783 transitions. Word has length 28 [2021-06-05 16:09:15,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:15,302 INFO L482 AbstractCegarLoop]: Abstraction has 9695 states and 35783 transitions. [2021-06-05 16:09:15,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:15,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9695 states and 35783 transitions. [2021-06-05 16:09:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:15,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:15,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:15,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:15,517 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1312201816, now seen corresponding path program 97 times [2021-06-05 16:09:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:15,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306669399] [2021-06-05 16:09:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:15,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306669399] [2021-06-05 16:09:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306669399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617393950] [2021-06-05 16:09:15,658 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:15,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:15,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:15,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:15,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:15,815 INFO L446 ElimStorePlain]: Different costs {0=[v_C_167], 6=[B]} [2021-06-05 16:09:15,816 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 162 treesize of output 126 [2021-06-05 16:09:15,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:15,839 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 16:09:15,840 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 191 treesize of output 151 [2021-06-05 16:09:15,841 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:15,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:27 [2021-06-05 16:09:15,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:15,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:15,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:15,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617393950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:15,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:15,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:15,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451831902] [2021-06-05 16:09:15,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:15,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:15,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:15,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:15,885 INFO L87 Difference]: Start difference. First operand 9695 states and 35783 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:16,435 INFO L93 Difference]: Finished difference Result 10918 states and 39241 transitions. [2021-06-05 16:09:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:09:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:16,454 INFO L225 Difference]: With dead ends: 10918 [2021-06-05 16:09:16,454 INFO L226 Difference]: Without dead ends: 10881 [2021-06-05 16:09:16,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:09:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-05 16:09:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 9718. [2021-06-05 16:09:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9718 states, 9717 states have (on average 3.6923947720489863) internal successors, (35879), 9717 states have internal predecessors, (35879), 0 states have call successors, (0), 0 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 16:09:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9718 states to 9718 states and 35879 transitions. [2021-06-05 16:09:16,594 INFO L78 Accepts]: Start accepts. Automaton has 9718 states and 35879 transitions. Word has length 28 [2021-06-05 16:09:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:16,594 INFO L482 AbstractCegarLoop]: Abstraction has 9718 states and 35879 transitions. [2021-06-05 16:09:16,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 9718 states and 35879 transitions. [2021-06-05 16:09:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:16,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:16,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:16,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 16:09:16,807 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 778166904, now seen corresponding path program 98 times [2021-06-05 16:09:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11810233] [2021-06-05 16:09:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:16,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11810233] [2021-06-05 16:09:16,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11810233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877414632] [2021-06-05 16:09:16,947 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:16,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:16,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:17,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:17,070 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 24 treesize of output 20 [2021-06-05 16:09:17,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:17,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:32 [2021-06-05 16:09:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:17,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:17,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 16:09:17,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:17,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:17,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:17,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877414632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:17,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:17,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:17,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756065730] [2021-06-05 16:09:17,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:17,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:17,142 INFO L87 Difference]: Start difference. First operand 9718 states and 35879 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:17,556 INFO L93 Difference]: Finished difference Result 12371 states and 44835 transitions. [2021-06-05 16:09:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:09:17,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:17,577 INFO L225 Difference]: With dead ends: 12371 [2021-06-05 16:09:17,577 INFO L226 Difference]: Without dead ends: 12310 [2021-06-05 16:09:17,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:09:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-06-05 16:09:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 9729. [2021-06-05 16:09:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9729 states, 9728 states have (on average 3.6907894736842106) internal successors, (35904), 9728 states have internal predecessors, (35904), 0 states have call successors, (0), 0 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 16:09:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 35904 transitions. [2021-06-05 16:09:17,720 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 35904 transitions. Word has length 28 [2021-06-05 16:09:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:17,720 INFO L482 AbstractCegarLoop]: Abstraction has 9729 states and 35904 transitions. [2021-06-05 16:09:17,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 35904 transitions. [2021-06-05 16:09:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:17,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:17,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:17,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:17,934 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1765658516, now seen corresponding path program 99 times [2021-06-05 16:09:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:17,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366307157] [2021-06-05 16:09:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:18,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366307157] [2021-06-05 16:09:18,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366307157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:18,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350515929] [2021-06-05 16:09:18,083 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:18,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:09:18,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:18,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:09:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:18,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:18,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:18,254 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 24 treesize of output 20 [2021-06-05 16:09:18,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:18,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2021-06-05 16:09:18,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 16:09:18,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:18,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:18,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:108 [2021-06-05 16:09:18,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:18,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:18,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:18,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:18,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:18,423 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 16:09:18,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:09:18,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-06-05 16:09:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:18,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350515929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:18,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:18,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:09:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935463377] [2021-06-05 16:09:18,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:09:18,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:09:18,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:09:18,512 INFO L87 Difference]: Start difference. First operand 9729 states and 35904 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:19,564 INFO L93 Difference]: Finished difference Result 12529 states and 45304 transitions. [2021-06-05 16:09:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:09:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:19,586 INFO L225 Difference]: With dead ends: 12529 [2021-06-05 16:09:19,586 INFO L226 Difference]: Without dead ends: 12498 [2021-06-05 16:09:19,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 868.0ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:09:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-06-05 16:09:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 9726. [2021-06-05 16:09:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 9725 states have (on average 3.692236503856041) internal successors, (35907), 9725 states have internal predecessors, (35907), 0 states have call successors, (0), 0 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 16:09:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 35907 transitions. [2021-06-05 16:09:19,717 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 35907 transitions. Word has length 28 [2021-06-05 16:09:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:19,717 INFO L482 AbstractCegarLoop]: Abstraction has 9726 states and 35907 transitions. [2021-06-05 16:09:19,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 35907 transitions. [2021-06-05 16:09:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:19,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:19,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:19,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:19,945 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -517396488, now seen corresponding path program 100 times [2021-06-05 16:09:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:19,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922392660] [2021-06-05 16:09:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:20,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922392660] [2021-06-05 16:09:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922392660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79929700] [2021-06-05 16:09:20,080 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:20,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:20,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:20,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:20,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:20,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:20,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:20,189 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 24 treesize of output 20 [2021-06-05 16:09:20,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:20,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:30 [2021-06-05 16:09:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:20,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:20,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-05 16:09:20,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:20,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:20,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:20,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79929700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:20,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:20,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:20,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510727721] [2021-06-05 16:09:20,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:20,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:20,277 INFO L87 Difference]: Start difference. First operand 9726 states and 35907 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:20,940 INFO L93 Difference]: Finished difference Result 12479 states and 45190 transitions. [2021-06-05 16:09:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:09:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:20,960 INFO L225 Difference]: With dead ends: 12479 [2021-06-05 16:09:20,961 INFO L226 Difference]: Without dead ends: 12457 [2021-06-05 16:09:20,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2021-06-05 16:09:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 9742. [2021-06-05 16:09:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9742 states, 9741 states have (on average 3.691920747356534) internal successors, (35963), 9741 states have internal predecessors, (35963), 0 states have call successors, (0), 0 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 16:09:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9742 states to 9742 states and 35963 transitions. [2021-06-05 16:09:21,092 INFO L78 Accepts]: Start accepts. Automaton has 9742 states and 35963 transitions. Word has length 28 [2021-06-05 16:09:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:21,092 INFO L482 AbstractCegarLoop]: Abstraction has 9742 states and 35963 transitions. [2021-06-05 16:09:21,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 9742 states and 35963 transitions. [2021-06-05 16:09:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:21,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:21,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:21,305 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -725729772, now seen corresponding path program 101 times [2021-06-05 16:09:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:21,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975740832] [2021-06-05 16:09:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:21,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975740832] [2021-06-05 16:09:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975740832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250817460] [2021-06-05 16:09:21,430 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:21,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:09:21,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:21,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:21,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:21,547 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 35 treesize of output 27 [2021-06-05 16:09:21,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:21,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:47 [2021-06-05 16:09:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:21,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:09:21,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:21,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 16:09:21,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:21,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:21,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:21,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:21,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250817460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:21,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:21,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:21,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112162231] [2021-06-05 16:09:21,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:21,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:21,643 INFO L87 Difference]: Start difference. First operand 9742 states and 35963 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:22,143 INFO L93 Difference]: Finished difference Result 12452 states and 45102 transitions. [2021-06-05 16:09:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:09:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:22,164 INFO L225 Difference]: With dead ends: 12452 [2021-06-05 16:09:22,164 INFO L226 Difference]: Without dead ends: 12415 [2021-06-05 16:09:22,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12415 states. [2021-06-05 16:09:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12415 to 9757. [2021-06-05 16:09:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 3.691369413694137) internal successors, (36013), 9756 states have internal predecessors, (36013), 0 states have call successors, (0), 0 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 16:09:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 36013 transitions. [2021-06-05 16:09:22,296 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 36013 transitions. Word has length 28 [2021-06-05 16:09:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:22,296 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 36013 transitions. [2021-06-05 16:09:22,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 36013 transitions. [2021-06-05 16:09:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:22,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:22,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:22,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 16:09:22,510 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:22,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1427320980, now seen corresponding path program 102 times [2021-06-05 16:09:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:22,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540057830] [2021-06-05 16:09:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:22,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540057830] [2021-06-05 16:09:22,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540057830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:22,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792130846] [2021-06-05 16:09:22,639 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:22,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:09:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:09:22,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:22,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:22,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:22,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:22,773 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 133 treesize of output 101 [2021-06-05 16:09:22,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:22,784 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 16:09:22,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:136, output treesize:33 [2021-06-05 16:09:22,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 33 [2021-06-05 16:09:22,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:22,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:22,878 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 16:09:22,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:108 [2021-06-05 16:09:22,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:22,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:22,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:22,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:22,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:22,986 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2021-06-05 16:09:22,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:09:22,986 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:99, output treesize:55 [2021-06-05 16:09:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:23,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792130846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:23,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:23,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:09:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264598658] [2021-06-05 16:09:23,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:09:23,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:23,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:09:23,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:09:23,082 INFO L87 Difference]: Start difference. First operand 9757 states and 36013 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:24,169 INFO L93 Difference]: Finished difference Result 12649 states and 45720 transitions. [2021-06-05 16:09:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:09:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:24,190 INFO L225 Difference]: With dead ends: 12649 [2021-06-05 16:09:24,191 INFO L226 Difference]: Without dead ends: 12627 [2021-06-05 16:09:24,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 798.5ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:09:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12627 states. [2021-06-05 16:09:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12627 to 9744. [2021-06-05 16:09:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9744 states, 9743 states have (on average 3.6938314687467924) internal successors, (35989), 9743 states have internal predecessors, (35989), 0 states have call successors, (0), 0 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 16:09:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9744 states to 9744 states and 35989 transitions. [2021-06-05 16:09:24,353 INFO L78 Accepts]: Start accepts. Automaton has 9744 states and 35989 transitions. Word has length 28 [2021-06-05 16:09:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:24,353 INFO L482 AbstractCegarLoop]: Abstraction has 9744 states and 35989 transitions. [2021-06-05 16:09:24,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9744 states and 35989 transitions. [2021-06-05 16:09:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:24,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:24,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:24,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:24,566 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1666712976, now seen corresponding path program 103 times [2021-06-05 16:09:24,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:24,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81649973] [2021-06-05 16:09:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:24,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:24,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81649973] [2021-06-05 16:09:24,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81649973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:24,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966150609] [2021-06-05 16:09:24,736 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:24,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:24,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:24,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:24,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:24,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:24,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:24,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:24,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:24,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:09:24,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:24,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:24,935 INFO L518 ElimStorePlain]: Eliminatee v_C_179 vanished before elimination [2021-06-05 16:09:24,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:24,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:09:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966150609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102600296] [2021-06-05 16:09:24,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:24,948 INFO L87 Difference]: Start difference. First operand 9744 states and 35989 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:25,439 INFO L93 Difference]: Finished difference Result 11077 states and 39775 transitions. [2021-06-05 16:09:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:25,457 INFO L225 Difference]: With dead ends: 11077 [2021-06-05 16:09:25,457 INFO L226 Difference]: Without dead ends: 11062 [2021-06-05 16:09:25,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-06-05 16:09:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9774. [2021-06-05 16:09:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9774 states, 9773 states have (on average 3.692827176915993) internal successors, (36090), 9773 states have internal predecessors, (36090), 0 states have call successors, (0), 0 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 16:09:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9774 states to 9774 states and 36090 transitions. [2021-06-05 16:09:25,591 INFO L78 Accepts]: Start accepts. Automaton has 9774 states and 36090 transitions. Word has length 28 [2021-06-05 16:09:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:25,592 INFO L482 AbstractCegarLoop]: Abstraction has 9774 states and 36090 transitions. [2021-06-05 16:09:25,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 9774 states and 36090 transitions. [2021-06-05 16:09:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:25,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:25,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:25,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 16:09:25,805 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:25,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:25,805 INFO L82 PathProgramCache]: Analyzing trace with hash -361685040, now seen corresponding path program 104 times [2021-06-05 16:09:25,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:25,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249101502] [2021-06-05 16:09:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:25,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249101502] [2021-06-05 16:09:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249101502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271442343] [2021-06-05 16:09:25,971 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:25,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:25,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:25,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:25,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:26,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:26,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:26,133 INFO L446 ElimStorePlain]: Different costs {0=[v_C_181], 1=[A]} [2021-06-05 16:09:26,135 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 35 treesize of output 27 [2021-06-05 16:09:26,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:26,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:26,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:09:26,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:26,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-06-05 16:09:26,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:26,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:26,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:26,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:26,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271442343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:26,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:26,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538149694] [2021-06-05 16:09:26,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:26,186 INFO L87 Difference]: Start difference. First operand 9774 states and 36090 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:26,703 INFO L93 Difference]: Finished difference Result 10963 states and 39523 transitions. [2021-06-05 16:09:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:09:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:26,721 INFO L225 Difference]: With dead ends: 10963 [2021-06-05 16:09:26,721 INFO L226 Difference]: Without dead ends: 10909 [2021-06-05 16:09:26,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-06-05 16:09:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 9765. [2021-06-05 16:09:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 3.6945923801720606) internal successors, (36074), 9764 states have internal predecessors, (36074), 0 states have call successors, (0), 0 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 16:09:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 36074 transitions. [2021-06-05 16:09:26,854 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 36074 transitions. Word has length 28 [2021-06-05 16:09:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:26,854 INFO L482 AbstractCegarLoop]: Abstraction has 9765 states and 36074 transitions. [2021-06-05 16:09:26,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 36074 transitions. [2021-06-05 16:09:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:26,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:26,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:27,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:27,067 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:27,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash 574248976, now seen corresponding path program 105 times [2021-06-05 16:09:27,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:27,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26771832] [2021-06-05 16:09:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:27,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26771832] [2021-06-05 16:09:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26771832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276510617] [2021-06-05 16:09:27,211 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:27,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:09:27,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:27,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 16:09:27,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:27,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:27,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:27,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:27,528 INFO L446 ElimStorePlain]: Different costs {0=[v_C_183, A], 2=[B]} [2021-06-05 16:09:27,530 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 24 treesize of output 20 [2021-06-05 16:09:27,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:27,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 16:09:27,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:27,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:27,547 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 16 [2021-06-05 16:09:27,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:27,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:27,552 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:48, output treesize:5 [2021-06-05 16:09:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:27,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276510617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:27,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:27,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:09:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537066004] [2021-06-05 16:09:27,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:09:27,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:09:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:09:27,565 INFO L87 Difference]: Start difference. First operand 9765 states and 36074 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:28,527 INFO L93 Difference]: Finished difference Result 10757 states and 38831 transitions. [2021-06-05 16:09:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:09:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:28,545 INFO L225 Difference]: With dead ends: 10757 [2021-06-05 16:09:28,545 INFO L226 Difference]: Without dead ends: 10711 [2021-06-05 16:09:28,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:09:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10711 states. [2021-06-05 16:09:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10711 to 9813. [2021-06-05 16:09:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9813 states, 9812 states have (on average 3.6925193640440277) internal successors, (36231), 9812 states have internal predecessors, (36231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9813 states to 9813 states and 36231 transitions. [2021-06-05 16:09:28,679 INFO L78 Accepts]: Start accepts. Automaton has 9813 states and 36231 transitions. Word has length 28 [2021-06-05 16:09:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:28,679 INFO L482 AbstractCegarLoop]: Abstraction has 9813 states and 36231 transitions. [2021-06-05 16:09:28,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9813 states and 36231 transitions. [2021-06-05 16:09:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:28,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:28,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:28,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:28,893 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash 705213332, now seen corresponding path program 106 times [2021-06-05 16:09:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:28,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26476442] [2021-06-05 16:09:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:29,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26476442] [2021-06-05 16:09:29,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26476442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:29,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326084971] [2021-06-05 16:09:29,044 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:29,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:29,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:29,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:29,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:29,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:29,193 INFO L446 ElimStorePlain]: Different costs {0=[v_C_185], 1=[B]} [2021-06-05 16:09:29,197 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 35 treesize of output 27 [2021-06-05 16:09:29,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:29,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:09:29,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:29,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:27 [2021-06-05 16:09:29,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:29,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:29,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:29,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326084971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:29,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:29,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:29,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790730662] [2021-06-05 16:09:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:29,248 INFO L87 Difference]: Start difference. First operand 9813 states and 36231 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:29,809 INFO L93 Difference]: Finished difference Result 11721 states and 41673 transitions. [2021-06-05 16:09:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:09:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:29,829 INFO L225 Difference]: With dead ends: 11721 [2021-06-05 16:09:29,829 INFO L226 Difference]: Without dead ends: 11659 [2021-06-05 16:09:29,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:09:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-06-05 16:09:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 9920. [2021-06-05 16:09:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9920 states, 9919 states have (on average 3.6937191249117856) internal successors, (36638), 9919 states have internal predecessors, (36638), 0 states have call successors, (0), 0 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 16:09:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 36638 transitions. [2021-06-05 16:09:29,969 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 36638 transitions. Word has length 28 [2021-06-05 16:09:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:29,969 INFO L482 AbstractCegarLoop]: Abstraction has 9920 states and 36638 transitions. [2021-06-05 16:09:29,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 36638 transitions. [2021-06-05 16:09:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:29,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:29,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:30,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:30,184 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 171178420, now seen corresponding path program 107 times [2021-06-05 16:09:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:30,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812770254] [2021-06-05 16:09:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:30,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:30,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812770254] [2021-06-05 16:09:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812770254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135072170] [2021-06-05 16:09:30,329 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:30,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:09:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:30,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:30,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:30,456 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 35 treesize of output 27 [2021-06-05 16:09:30,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:30,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:51 [2021-06-05 16:09:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:09:30,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:30,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 16:09:30,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:30,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:30,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:30,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135072170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:30,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:30,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341688781] [2021-06-05 16:09:30,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:30,532 INFO L87 Difference]: Start difference. First operand 9920 states and 36638 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:30,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:30,990 INFO L93 Difference]: Finished difference Result 12635 states and 45808 transitions. [2021-06-05 16:09:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:09:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:31,012 INFO L225 Difference]: With dead ends: 12635 [2021-06-05 16:09:31,012 INFO L226 Difference]: Without dead ends: 12586 [2021-06-05 16:09:31,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12586 states. [2021-06-05 16:09:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12586 to 9928. [2021-06-05 16:09:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9928 states, 9927 states have (on average 3.692454920922736) internal successors, (36655), 9927 states have internal predecessors, (36655), 0 states have call successors, (0), 0 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 16:09:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9928 states to 9928 states and 36655 transitions. [2021-06-05 16:09:31,178 INFO L78 Accepts]: Start accepts. Automaton has 9928 states and 36655 transitions. Word has length 28 [2021-06-05 16:09:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:31,178 INFO L482 AbstractCegarLoop]: Abstraction has 9928 states and 36655 transitions. [2021-06-05 16:09:31,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9928 states and 36655 transitions. [2021-06-05 16:09:31,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:31,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:31,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:31,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:31,391 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1158670032, now seen corresponding path program 108 times [2021-06-05 16:09:31,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:31,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163868856] [2021-06-05 16:09:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:31,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163868856] [2021-06-05 16:09:31,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163868856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:31,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75266932] [2021-06-05 16:09:31,557 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:31,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:09:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:31,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:31,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:31,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:31,676 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 24 treesize of output 20 [2021-06-05 16:09:31,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:31,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:34 [2021-06-05 16:09:31,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:31,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:31,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 16:09:31,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:31,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:31,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:31,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:31,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75266932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:31,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:31,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:31,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845537776] [2021-06-05 16:09:31,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:31,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:31,743 INFO L87 Difference]: Start difference. First operand 9928 states and 36655 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:32,161 INFO L93 Difference]: Finished difference Result 12663 states and 45885 transitions. [2021-06-05 16:09:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:09:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:32,183 INFO L225 Difference]: With dead ends: 12663 [2021-06-05 16:09:32,183 INFO L226 Difference]: Without dead ends: 12624 [2021-06-05 16:09:32,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12624 states. [2021-06-05 16:09:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 9929. [2021-06-05 16:09:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9929 states, 9928 states have (on average 3.692385173247381) internal successors, (36658), 9928 states have internal predecessors, (36658), 0 states have call successors, (0), 0 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 16:09:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9929 states to 9929 states and 36658 transitions. [2021-06-05 16:09:32,326 INFO L78 Accepts]: Start accepts. Automaton has 9929 states and 36658 transitions. Word has length 28 [2021-06-05 16:09:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:32,327 INFO L482 AbstractCegarLoop]: Abstraction has 9929 states and 36658 transitions. [2021-06-05 16:09:32,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9929 states and 36658 transitions. [2021-06-05 16:09:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:32,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:32,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:32,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:32,540 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1201624854, now seen corresponding path program 109 times [2021-06-05 16:09:32,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:32,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545900429] [2021-06-05 16:09:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:32,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:32,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545900429] [2021-06-05 16:09:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545900429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:32,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493937042] [2021-06-05 16:09:32,688 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:32,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:32,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:32,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:32,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:32,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:32,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:32,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:32,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:32,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:09:32,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:32,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:32,868 INFO L518 ElimStorePlain]: Eliminatee v_C_191 vanished before elimination [2021-06-05 16:09:32,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:32,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:5 [2021-06-05 16:09:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:32,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493937042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:32,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:32,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:32,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413001107] [2021-06-05 16:09:32,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:32,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:32,881 INFO L87 Difference]: Start difference. First operand 9929 states and 36658 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:33,499 INFO L93 Difference]: Finished difference Result 12365 states and 43476 transitions. [2021-06-05 16:09:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:09:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:33,521 INFO L225 Difference]: With dead ends: 12365 [2021-06-05 16:09:33,522 INFO L226 Difference]: Without dead ends: 12322 [2021-06-05 16:09:33,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:09:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2021-06-05 16:09:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 9938. [2021-06-05 16:09:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9938 states, 9937 states have (on average 3.695380899667908) internal successors, (36721), 9937 states have internal predecessors, (36721), 0 states have call successors, (0), 0 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 16:09:33,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9938 states to 9938 states and 36721 transitions. [2021-06-05 16:09:33,679 INFO L78 Accepts]: Start accepts. Automaton has 9938 states and 36721 transitions. Word has length 28 [2021-06-05 16:09:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:33,679 INFO L482 AbstractCegarLoop]: Abstraction has 9938 states and 36721 transitions. [2021-06-05 16:09:33,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9938 states and 36721 transitions. [2021-06-05 16:09:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:33,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:33,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:33,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 16:09:33,893 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1324280048, now seen corresponding path program 110 times [2021-06-05 16:09:33,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:33,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845542489] [2021-06-05 16:09:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:34,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:34,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845542489] [2021-06-05 16:09:34,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845542489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:34,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663475692] [2021-06-05 16:09:34,026 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:34,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:34,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:34,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:34,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:34,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:34,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:34,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:34,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:34,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:34,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:34,215 INFO L518 ElimStorePlain]: Eliminatee v_C_193 vanished before elimination [2021-06-05 16:09:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:34,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:34,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:34,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:34,217 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:7 [2021-06-05 16:09:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663475692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:34,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:34,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442159648] [2021-06-05 16:09:34,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:34,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:34,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:34,231 INFO L87 Difference]: Start difference. First operand 9938 states and 36721 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:34,608 INFO L93 Difference]: Finished difference Result 10770 states and 39102 transitions. [2021-06-05 16:09:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:09:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 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 28 [2021-06-05 16:09:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:34,625 INFO L225 Difference]: With dead ends: 10770 [2021-06-05 16:09:34,625 INFO L226 Difference]: Without dead ends: 10755 [2021-06-05 16:09:34,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:09:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-06-05 16:09:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 9962. [2021-06-05 16:09:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 3.6937054512599135) internal successors, (36793), 9961 states have internal predecessors, (36793), 0 states have call successors, (0), 0 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 16:09:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 36793 transitions. [2021-06-05 16:09:34,757 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 36793 transitions. Word has length 28 [2021-06-05 16:09:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:34,757 INFO L482 AbstractCegarLoop]: Abstraction has 9962 states and 36793 transitions. [2021-06-05 16:09:34,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:09:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 36793 transitions. [2021-06-05 16:09:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:34,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:34,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:34,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 16:09:34,970 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:34,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:34,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1193315692, now seen corresponding path program 111 times [2021-06-05 16:09:34,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:34,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166310321] [2021-06-05 16:09:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:35,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166310321] [2021-06-05 16:09:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166310321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397936585] [2021-06-05 16:09:35,114 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:35,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:09:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:09:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:35,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:35,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:35,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 16:09:35,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:35,261 INFO L518 ElimStorePlain]: Eliminatee v_C_195 vanished before elimination [2021-06-05 16:09:35,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:19 [2021-06-05 16:09:35,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:35,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:35,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:35,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397936585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:35,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:35,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:35,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782797952] [2021-06-05 16:09:35,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:35,296 INFO L87 Difference]: Start difference. First operand 9962 states and 36793 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:36,127 INFO L93 Difference]: Finished difference Result 11762 states and 41954 transitions. [2021-06-05 16:09:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:09:36,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:36,146 INFO L225 Difference]: With dead ends: 11762 [2021-06-05 16:09:36,146 INFO L226 Difference]: Without dead ends: 11725 [2021-06-05 16:09:36,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:09:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2021-06-05 16:09:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 9985. [2021-06-05 16:09:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9985 states, 9984 states have (on average 3.6968149038461537) internal successors, (36909), 9984 states have internal predecessors, (36909), 0 states have call successors, (0), 0 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 16:09:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9985 states to 9985 states and 36909 transitions. [2021-06-05 16:09:36,287 INFO L78 Accepts]: Start accepts. Automaton has 9985 states and 36909 transitions. Word has length 28 [2021-06-05 16:09:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:36,287 INFO L482 AbstractCegarLoop]: Abstraction has 9985 states and 36909 transitions. [2021-06-05 16:09:36,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 9985 states and 36909 transitions. [2021-06-05 16:09:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:36,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:36,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:36,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 16:09:36,501 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1151240340, now seen corresponding path program 112 times [2021-06-05 16:09:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:36,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991944437] [2021-06-05 16:09:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:36,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:36,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991944437] [2021-06-05 16:09:36,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991944437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:36,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426835819] [2021-06-05 16:09:36,631 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:36,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:36,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:36,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:36,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:36,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:36,763 INFO L446 ElimStorePlain]: Different costs {0=[v_C_197], 1=[B]} [2021-06-05 16:09:36,765 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 29 treesize of output 25 [2021-06-05 16:09:36,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:36,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 16:09:36,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:36,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-06-05 16:09:36,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:36,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:36,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:36,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:36,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426835819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:36,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:36,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:36,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348223512] [2021-06-05 16:09:36,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:36,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:36,832 INFO L87 Difference]: Start difference. First operand 9985 states and 36909 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:37,793 INFO L93 Difference]: Finished difference Result 11223 states and 40366 transitions. [2021-06-05 16:09:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:09:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:37,812 INFO L225 Difference]: With dead ends: 11223 [2021-06-05 16:09:37,812 INFO L226 Difference]: Without dead ends: 11186 [2021-06-05 16:09:37,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:09:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-06-05 16:09:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 10017. [2021-06-05 16:09:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10017 states, 10016 states have (on average 3.694988019169329) internal successors, (37009), 10016 states have internal predecessors, (37009), 0 states have call successors, (0), 0 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 16:09:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10017 states to 10017 states and 37009 transitions. [2021-06-05 16:09:37,984 INFO L78 Accepts]: Start accepts. Automaton has 10017 states and 37009 transitions. Word has length 28 [2021-06-05 16:09:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:37,984 INFO L482 AbstractCegarLoop]: Abstraction has 10017 states and 37009 transitions. [2021-06-05 16:09:37,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10017 states and 37009 transitions. [2021-06-05 16:09:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:37,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:37,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:38,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:38,199 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1950581624, now seen corresponding path program 113 times [2021-06-05 16:09:38,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:38,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962792279] [2021-06-05 16:09:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:38,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962792279] [2021-06-05 16:09:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962792279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119683697] [2021-06-05 16:09:38,321 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:38,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:09:38,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:38,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:38,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:38,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:38,428 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 29 treesize of output 25 [2021-06-05 16:09:38,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:38,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2021-06-05 16:09:38,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:38,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:38,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:21 [2021-06-05 16:09:38,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:38,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:38,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:38,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 16:09:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:38,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119683697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:38,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:38,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:38,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211035581] [2021-06-05 16:09:38,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:38,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:38,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:38,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:38,520 INFO L87 Difference]: Start difference. First operand 10017 states and 37009 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:38,984 INFO L93 Difference]: Finished difference Result 12848 states and 46558 transitions. [2021-06-05 16:09:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:39,008 INFO L225 Difference]: With dead ends: 12848 [2021-06-05 16:09:39,008 INFO L226 Difference]: Without dead ends: 12815 [2021-06-05 16:09:39,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:09:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12815 states. [2021-06-05 16:09:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12815 to 10025. [2021-06-05 16:09:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10025 states, 10024 states have (on average 3.6940343176376698) internal successors, (37029), 10024 states have internal predecessors, (37029), 0 states have call successors, (0), 0 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 16:09:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 37029 transitions. [2021-06-05 16:09:39,152 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 37029 transitions. Word has length 28 [2021-06-05 16:09:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:39,152 INFO L482 AbstractCegarLoop]: Abstraction has 10025 states and 37029 transitions. [2021-06-05 16:09:39,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 37029 transitions. [2021-06-05 16:09:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:39,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:39,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:39,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 16:09:39,366 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1356894060, now seen corresponding path program 114 times [2021-06-05 16:09:39,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:39,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449491655] [2021-06-05 16:09:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:39,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449491655] [2021-06-05 16:09:39,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449491655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:39,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808239714] [2021-06-05 16:09:39,495 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:39,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:09:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:39,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:39,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:39,599 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 29 treesize of output 25 [2021-06-05 16:09:39,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:39,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-06-05 16:09:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:09:39,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:39,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:27 [2021-06-05 16:09:39,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:39,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:39,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:39,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808239714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:39,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:39,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:39,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691880149] [2021-06-05 16:09:39,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:39,694 INFO L87 Difference]: Start difference. First operand 10025 states and 37029 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:40,281 INFO L93 Difference]: Finished difference Result 12912 states and 46714 transitions. [2021-06-05 16:09:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:40,303 INFO L225 Difference]: With dead ends: 12912 [2021-06-05 16:09:40,303 INFO L226 Difference]: Without dead ends: 12876 [2021-06-05 16:09:40,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:09:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12876 states. [2021-06-05 16:09:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12876 to 10024. [2021-06-05 16:09:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10024 states, 10023 states have (on average 3.694103561807842) internal successors, (37026), 10023 states have internal predecessors, (37026), 0 states have call successors, (0), 0 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 16:09:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10024 states to 10024 states and 37026 transitions. [2021-06-05 16:09:40,442 INFO L78 Accepts]: Start accepts. Automaton has 10024 states and 37026 transitions. Word has length 28 [2021-06-05 16:09:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:40,442 INFO L482 AbstractCegarLoop]: Abstraction has 10024 states and 37026 transitions. [2021-06-05 16:09:40,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 10024 states and 37026 transitions. [2021-06-05 16:09:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:40,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:40,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:40,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:40,655 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1127646672, now seen corresponding path program 115 times [2021-06-05 16:09:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:40,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130980542] [2021-06-05 16:09:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:40,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:40,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130980542] [2021-06-05 16:09:40,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130980542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:40,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519766139] [2021-06-05 16:09:40,784 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:40,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:40,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:40,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:40,889 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 29 treesize of output 25 [2021-06-05 16:09:40,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:40,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2021-06-05 16:09:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 16:09:40,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:40,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2021-06-05 16:09:40,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:40,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:40,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:40,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:40,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519766139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:40,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:40,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 16:09:40,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633110512] [2021-06-05 16:09:40,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:09:40,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:40,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:09:40,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:09:40,977 INFO L87 Difference]: Start difference. First operand 10024 states and 37026 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:41,576 INFO L93 Difference]: Finished difference Result 12887 states and 46654 transitions. [2021-06-05 16:09:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:09:41,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:41,598 INFO L225 Difference]: With dead ends: 12887 [2021-06-05 16:09:41,598 INFO L226 Difference]: Without dead ends: 12866 [2021-06-05 16:09:41,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:09:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12866 states. [2021-06-05 16:09:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12866 to 10028. [2021-06-05 16:09:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10027 states have (on average 3.6940261294504837) internal successors, (37040), 10027 states have internal predecessors, (37040), 0 states have call successors, (0), 0 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 16:09:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 37040 transitions. [2021-06-05 16:09:41,736 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 37040 transitions. Word has length 28 [2021-06-05 16:09:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:41,736 INFO L482 AbstractCegarLoop]: Abstraction has 10028 states and 37040 transitions. [2021-06-05 16:09:41,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 37040 transitions. [2021-06-05 16:09:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:41,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:41,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:41,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:41,949 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1389598472, now seen corresponding path program 116 times [2021-06-05 16:09:41,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:41,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729547788] [2021-06-05 16:09:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:42,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729547788] [2021-06-05 16:09:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729547788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138331465] [2021-06-05 16:09:42,061 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:42,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:42,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:42,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:42,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:42,135 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 29 treesize of output 25 [2021-06-05 16:09:42,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:42,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:09:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:42,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:42,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-06-05 16:09:42,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:42,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:19 [2021-06-05 16:09:42,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:42,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:42,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:42,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138331465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:42,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:42,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:09:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257207740] [2021-06-05 16:09:42,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:42,240 INFO L87 Difference]: Start difference. First operand 10028 states and 37040 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:42,917 INFO L93 Difference]: Finished difference Result 12914 states and 46791 transitions. [2021-06-05 16:09:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:09:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:42,941 INFO L225 Difference]: With dead ends: 12914 [2021-06-05 16:09:42,941 INFO L226 Difference]: Without dead ends: 12899 [2021-06-05 16:09:42,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:09:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2021-06-05 16:09:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 10052. [2021-06-05 16:09:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 3.692368918515571) internal successors, (37112), 10051 states have internal predecessors, (37112), 0 states have call successors, (0), 0 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 16:09:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 37112 transitions. [2021-06-05 16:09:43,079 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 37112 transitions. Word has length 28 [2021-06-05 16:09:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:43,079 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 37112 transitions. [2021-06-05 16:09:43,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 37112 transitions. [2021-06-05 16:09:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:43,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:43,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:43,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:43,292 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1597931756, now seen corresponding path program 117 times [2021-06-05 16:09:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595847504] [2021-06-05 16:09:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:43,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:43,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595847504] [2021-06-05 16:09:43,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595847504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:43,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277128453] [2021-06-05 16:09:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:43,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:09:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:09:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:43,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:43,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:43,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:43,499 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 29 treesize of output 25 [2021-06-05 16:09:43,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:43,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-06-05 16:09:43,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:43,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:43,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:43,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-06-05 16:09:43,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 16:09:43,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:43,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:43,660 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 16:09:43,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 16:09:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:43,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277128453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:43,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:43,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:09:43,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181323335] [2021-06-05 16:09:43,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:09:43,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:09:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:09:43,717 INFO L87 Difference]: Start difference. First operand 10052 states and 37112 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:44,369 INFO L93 Difference]: Finished difference Result 12993 states and 46992 transitions. [2021-06-05 16:09:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:44,391 INFO L225 Difference]: With dead ends: 12993 [2021-06-05 16:09:44,392 INFO L226 Difference]: Without dead ends: 12963 [2021-06-05 16:09:44,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 455.4ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:09:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12963 states. [2021-06-05 16:09:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12963 to 10070. [2021-06-05 16:09:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10069 states have (on average 3.6917270831264277) internal successors, (37172), 10069 states have internal predecessors, (37172), 0 states have call successors, (0), 0 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 16:09:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 37172 transitions. [2021-06-05 16:09:44,596 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 37172 transitions. Word has length 28 [2021-06-05 16:09:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:44,596 INFO L482 AbstractCegarLoop]: Abstraction has 10070 states and 37172 transitions. [2021-06-05 16:09:44,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 37172 transitions. [2021-06-05 16:09:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:44,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:44,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:44,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:44,810 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1625594160, now seen corresponding path program 118 times [2021-06-05 16:09:44,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:44,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428101668] [2021-06-05 16:09:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:44,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:44,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428101668] [2021-06-05 16:09:44,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428101668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:44,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135129409] [2021-06-05 16:09:44,923 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:44,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:44,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:44,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:44,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:44,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:44,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:44,996 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 29 treesize of output 25 [2021-06-05 16:09:44,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:45,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:09:45,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:45,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:45,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 16:09:45,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:45,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:45,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:45,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:45,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135129409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:45,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:45,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:09:45,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316062147] [2021-06-05 16:09:45,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:45,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:45,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:45,105 INFO L87 Difference]: Start difference. First operand 10070 states and 37172 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:45,694 INFO L93 Difference]: Finished difference Result 14117 states and 50820 transitions. [2021-06-05 16:09:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:09:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:45,719 INFO L225 Difference]: With dead ends: 14117 [2021-06-05 16:09:45,719 INFO L226 Difference]: Without dead ends: 14092 [2021-06-05 16:09:45,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:09:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14092 states. [2021-06-05 16:09:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14092 to 10066. [2021-06-05 16:09:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 10065 states have (on average 3.6918032786885244) internal successors, (37158), 10065 states have internal predecessors, (37158), 0 states have call successors, (0), 0 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 16:09:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 37158 transitions. [2021-06-05 16:09:45,865 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 37158 transitions. Word has length 28 [2021-06-05 16:09:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:45,865 INFO L482 AbstractCegarLoop]: Abstraction has 10066 states and 37158 transitions. [2021-06-05 16:09:45,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 37158 transitions. [2021-06-05 16:09:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:45,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:45,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:46,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:46,080 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash 555118996, now seen corresponding path program 119 times [2021-06-05 16:09:46,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:46,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657749454] [2021-06-05 16:09:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:46,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657749454] [2021-06-05 16:09:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657749454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:46,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673013669] [2021-06-05 16:09:46,201 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:46,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:09:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:46,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:46,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:46,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:46,276 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 29 treesize of output 25 [2021-06-05 16:09:46,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:46,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:09:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:46,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:09:46,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:46,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-06-05 16:09:46,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:46,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:46,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:46,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:46,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673013669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:46,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:46,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:09:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481944421] [2021-06-05 16:09:46,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:46,379 INFO L87 Difference]: Start difference. First operand 10066 states and 37158 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:46,971 INFO L93 Difference]: Finished difference Result 12990 states and 47026 transitions. [2021-06-05 16:09:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:09:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:46,994 INFO L225 Difference]: With dead ends: 12990 [2021-06-05 16:09:46,994 INFO L226 Difference]: Without dead ends: 12975 [2021-06-05 16:09:46,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:09:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2021-06-05 16:09:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 10052. [2021-06-05 16:09:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10052 states, 10051 states have (on average 3.693960799920406) internal successors, (37128), 10051 states have internal predecessors, (37128), 0 states have call successors, (0), 0 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 16:09:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 37128 transitions. [2021-06-05 16:09:47,136 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 37128 transitions. Word has length 28 [2021-06-05 16:09:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:47,136 INFO L482 AbstractCegarLoop]: Abstraction has 10052 states and 37128 transitions. [2021-06-05 16:09:47,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 37128 transitions. [2021-06-05 16:09:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:47,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:47,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:47,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 16:09:47,350 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1956104880, now seen corresponding path program 120 times [2021-06-05 16:09:47,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:47,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747178880] [2021-06-05 16:09:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:47,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:47,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747178880] [2021-06-05 16:09:47,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747178880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:47,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939105916] [2021-06-05 16:09:47,473 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:47,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:09:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:09:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:47,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:47,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:47,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:47,546 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 29 treesize of output 25 [2021-06-05 16:09:47,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:47,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-06-05 16:09:47,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:47,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:47,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:47,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:22 [2021-06-05 16:09:47,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 16:09:47,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:47,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:47,718 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 16:09:47,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 16:09:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:47,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939105916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:47,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:47,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:09:47,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143607791] [2021-06-05 16:09:47,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:09:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:47,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:09:47,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:09:47,809 INFO L87 Difference]: Start difference. First operand 10052 states and 37128 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:48,990 INFO L93 Difference]: Finished difference Result 13115 states and 47363 transitions. [2021-06-05 16:09:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:09:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:49,014 INFO L225 Difference]: With dead ends: 13115 [2021-06-05 16:09:49,014 INFO L226 Difference]: Without dead ends: 13085 [2021-06-05 16:09:49,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 800.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:09:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13085 states. [2021-06-05 16:09:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13085 to 10087. [2021-06-05 16:09:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 3.6931390045607775) internal successors, (37249), 10086 states have internal predecessors, (37249), 0 states have call successors, (0), 0 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 16:09:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 37249 transitions. [2021-06-05 16:09:49,165 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 37249 transitions. Word has length 28 [2021-06-05 16:09:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:49,165 INFO L482 AbstractCegarLoop]: Abstraction has 10087 states and 37249 transitions. [2021-06-05 16:09:49,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 37249 transitions. [2021-06-05 16:09:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:49,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:49,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:49,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:49,379 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1416815204, now seen corresponding path program 121 times [2021-06-05 16:09:49,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:49,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358563048] [2021-06-05 16:09:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:49,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:49,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358563048] [2021-06-05 16:09:49,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358563048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:49,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666569578] [2021-06-05 16:09:49,501 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:49,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:49,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 16:09:49,574 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 29 treesize of output 25 [2021-06-05 16:09:49,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:49,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:09:49,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:09:49,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:49,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-06-05 16:09:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:49,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:49,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:49,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666569578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:49,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:49,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:09:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565835498] [2021-06-05 16:09:49,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:49,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:49,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:49,680 INFO L87 Difference]: Start difference. First operand 10087 states and 37249 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:50,275 INFO L93 Difference]: Finished difference Result 14163 states and 51009 transitions. [2021-06-05 16:09:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:09:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:50,300 INFO L225 Difference]: With dead ends: 14163 [2021-06-05 16:09:50,300 INFO L226 Difference]: Without dead ends: 14148 [2021-06-05 16:09:50,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:09:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14148 states. [2021-06-05 16:09:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14148 to 10078. [2021-06-05 16:09:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10078 states, 10077 states have (on average 3.6925672323112035) internal successors, (37210), 10077 states have internal predecessors, (37210), 0 states have call successors, (0), 0 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 16:09:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10078 states to 10078 states and 37210 transitions. [2021-06-05 16:09:50,452 INFO L78 Accepts]: Start accepts. Automaton has 10078 states and 37210 transitions. Word has length 28 [2021-06-05 16:09:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:50,452 INFO L482 AbstractCegarLoop]: Abstraction has 10078 states and 37210 transitions. [2021-06-05 16:09:50,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10078 states and 37210 transitions. [2021-06-05 16:09:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:50,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:50,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:50,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 16:09:50,666 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash 196945872, now seen corresponding path program 122 times [2021-06-05 16:09:50,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:50,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66103858] [2021-06-05 16:09:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:50,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66103858] [2021-06-05 16:09:50,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66103858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4765507] [2021-06-05 16:09:50,784 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:50,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:50,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:50,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:09:50,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:50,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:09:50,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:50,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-06-05 16:09:50,877 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 29 treesize of output 25 [2021-06-05 16:09:50,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:50,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 16:09:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 16:09:50,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:50,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:26 [2021-06-05 16:09:50,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 16:09:50,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:50,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:50,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 16:09:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:51,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4765507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:51,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:51,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 16:09:51,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434541497] [2021-06-05 16:09:51,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:09:51,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:09:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:09:51,007 INFO L87 Difference]: Start difference. First operand 10078 states and 37210 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:51,566 INFO L93 Difference]: Finished difference Result 13048 states and 47207 transitions. [2021-06-05 16:09:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:09:51,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:51,634 INFO L225 Difference]: With dead ends: 13048 [2021-06-05 16:09:51,634 INFO L226 Difference]: Without dead ends: 13023 [2021-06-05 16:09:51,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:09:51,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13023 states. [2021-06-05 16:09:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13023 to 10072. [2021-06-05 16:09:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.6937742031575813) internal successors, (37200), 10071 states have internal predecessors, (37200), 0 states have call successors, (0), 0 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 16:09:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 37200 transitions. [2021-06-05 16:09:51,767 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 37200 transitions. Word has length 28 [2021-06-05 16:09:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:51,767 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 37200 transitions. [2021-06-05 16:09:51,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 37200 transitions. [2021-06-05 16:09:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:09:51,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:51,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:51,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 16:09:51,981 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:51,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1892178224, now seen corresponding path program 123 times [2021-06-05 16:09:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:51,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630812329] [2021-06-05 16:09:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:52,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:52,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630812329] [2021-06-05 16:09:52,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630812329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:52,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864833240] [2021-06-05 16:09:52,110 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:52,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:09:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:09:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:52,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 16:09:52,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 16:09:52,218 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 25 treesize of output 21 [2021-06-05 16:09:52,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:09:52,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:37 [2021-06-05 16:09:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:09:52,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 16:09:52,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:09:52,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:09:52,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:76 [2021-06-05 16:09:52,580 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_21, v_prenex_22], 2=[A, v_prenex_23]} [2021-06-05 16:09:52,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:52,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 16:09:52,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:52,657 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 11 [2021-06-05 16:09:52,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:09:52,686 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 20 treesize of output 12 [2021-06-05 16:09:52,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:09:52,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:09:52,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:09:52,710 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:83 [2021-06-05 16:09:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:52,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864833240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:52,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:52,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:09:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869932663] [2021-06-05 16:09:52,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:09:52,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:52,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:09:52,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:09:52,827 INFO L87 Difference]: Start difference. First operand 10072 states and 37200 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:53,839 INFO L93 Difference]: Finished difference Result 12969 states and 46995 transitions. [2021-06-05 16:09:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:09:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:09:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:53,862 INFO L225 Difference]: With dead ends: 12969 [2021-06-05 16:09:53,862 INFO L226 Difference]: Without dead ends: 12954 [2021-06-05 16:09:53,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:09:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12954 states. [2021-06-05 16:09:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12954 to 10064. [2021-06-05 16:09:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10064 states, 10063 states have (on average 3.6947232435655373) internal successors, (37180), 10063 states have internal predecessors, (37180), 0 states have call successors, (0), 0 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 16:09:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10064 states to 10064 states and 37180 transitions. [2021-06-05 16:09:54,011 INFO L78 Accepts]: Start accepts. Automaton has 10064 states and 37180 transitions. Word has length 28 [2021-06-05 16:09:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:54,011 INFO L482 AbstractCegarLoop]: Abstraction has 10064 states and 37180 transitions. [2021-06-05 16:09:54,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10064 states and 37180 transitions. [2021-06-05 16:09:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:54,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:54,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:54,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 16:09:54,225 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2051579474, now seen corresponding path program 124 times [2021-06-05 16:09:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914235430] [2021-06-05 16:09:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:54,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:54,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914235430] [2021-06-05 16:09:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914235430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:54,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865897710] [2021-06-05 16:09:54,248 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:54,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:09:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865897710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:09:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383577939] [2021-06-05 16:09:54,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:09:54,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:09:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:09:54,305 INFO L87 Difference]: Start difference. First operand 10064 states and 37180 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:54,450 INFO L93 Difference]: Finished difference Result 15939 states and 56045 transitions. [2021-06-05 16:09:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:09:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:54,478 INFO L225 Difference]: With dead ends: 15939 [2021-06-05 16:09:54,478 INFO L226 Difference]: Without dead ends: 15797 [2021-06-05 16:09:54,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:09:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-05 16:09:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 10916. [2021-06-05 16:09:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10916 states, 10915 states have (on average 3.676408612001832) internal successors, (40128), 10915 states have internal predecessors, (40128), 0 states have call successors, (0), 0 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 16:09:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10916 states to 10916 states and 40128 transitions. [2021-06-05 16:09:54,647 INFO L78 Accepts]: Start accepts. Automaton has 10916 states and 40128 transitions. Word has length 30 [2021-06-05 16:09:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:54,647 INFO L482 AbstractCegarLoop]: Abstraction has 10916 states and 40128 transitions. [2021-06-05 16:09:54,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10916 states and 40128 transitions. [2021-06-05 16:09:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:54,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:54,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:54,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 16:09:54,861 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:54,862 INFO L82 PathProgramCache]: Analyzing trace with hash 517875058, now seen corresponding path program 125 times [2021-06-05 16:09:54,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:54,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892127750] [2021-06-05 16:09:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:54,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:54,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892127750] [2021-06-05 16:09:54,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892127750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:54,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105043913] [2021-06-05 16:09:54,885 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:54,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:09:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105043913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:54,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:54,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:09:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933661331] [2021-06-05 16:09:54,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:09:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:09:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:09:54,942 INFO L87 Difference]: Start difference. First operand 10916 states and 40128 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:55,109 INFO L93 Difference]: Finished difference Result 16904 states and 60841 transitions. [2021-06-05 16:09:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:09:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:55,140 INFO L225 Difference]: With dead ends: 16904 [2021-06-05 16:09:55,140 INFO L226 Difference]: Without dead ends: 16783 [2021-06-05 16:09:55,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:09:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-06-05 16:09:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 14514. [2021-06-05 16:09:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14514 states, 14513 states have (on average 3.717425756218563) internal successors, (53951), 14513 states have internal predecessors, (53951), 0 states have call successors, (0), 0 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 16:09:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14514 states to 14514 states and 53951 transitions. [2021-06-05 16:09:55,375 INFO L78 Accepts]: Start accepts. Automaton has 14514 states and 53951 transitions. Word has length 30 [2021-06-05 16:09:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:55,375 INFO L482 AbstractCegarLoop]: Abstraction has 14514 states and 53951 transitions. [2021-06-05 16:09:55,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14514 states and 53951 transitions. [2021-06-05 16:09:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:55,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:55,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:55,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2021-06-05 16:09:55,597 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1497741678, now seen corresponding path program 126 times [2021-06-05 16:09:55,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:55,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930455107] [2021-06-05 16:09:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:55,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:55,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930455107] [2021-06-05 16:09:55,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930455107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:55,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195455443] [2021-06-05 16:09:55,620 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:55,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:09:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:55,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195455443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:55,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:55,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:09:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082286547] [2021-06-05 16:09:55,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:09:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:09:55,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:09:55,685 INFO L87 Difference]: Start difference. First operand 14514 states and 53951 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:55,849 INFO L93 Difference]: Finished difference Result 23573 states and 86435 transitions. [2021-06-05 16:09:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:09:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:55,893 INFO L225 Difference]: With dead ends: 23573 [2021-06-05 16:09:55,894 INFO L226 Difference]: Without dead ends: 23291 [2021-06-05 16:09:55,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:09:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23291 states. [2021-06-05 16:09:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23291 to 20337. [2021-06-05 16:09:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20337 states, 20336 states have (on average 3.776062155782848) internal successors, (76790), 20336 states have internal predecessors, (76790), 0 states have call successors, (0), 0 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 16:09:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20337 states to 20337 states and 76790 transitions. [2021-06-05 16:09:56,226 INFO L78 Accepts]: Start accepts. Automaton has 20337 states and 76790 transitions. Word has length 30 [2021-06-05 16:09:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:56,226 INFO L482 AbstractCegarLoop]: Abstraction has 20337 states and 76790 transitions. [2021-06-05 16:09:56,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20337 states and 76790 transitions. [2021-06-05 16:09:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:56,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:56,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:56,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-06-05 16:09:56,455 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1273390866, now seen corresponding path program 127 times [2021-06-05 16:09:56,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:56,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969945293] [2021-06-05 16:09:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:56,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:56,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969945293] [2021-06-05 16:09:56,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969945293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:56,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508751971] [2021-06-05 16:09:56,471 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:56,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:56,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508751971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:56,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:56,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:09:56,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243203836] [2021-06-05 16:09:56,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:09:56,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:09:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:09:56,523 INFO L87 Difference]: Start difference. First operand 20337 states and 76790 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:56,659 INFO L93 Difference]: Finished difference Result 22831 states and 84032 transitions. [2021-06-05 16:09:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:09:56,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:56,703 INFO L225 Difference]: With dead ends: 22831 [2021-06-05 16:09:56,703 INFO L226 Difference]: Without dead ends: 22805 [2021-06-05 16:09:56,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:09:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22805 states. [2021-06-05 16:09:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22805 to 18685. [2021-06-05 16:09:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18685 states, 18684 states have (on average 3.7420787839862983) internal successors, (69917), 18684 states have internal predecessors, (69917), 0 states have call successors, (0), 0 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 16:09:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18685 states to 18685 states and 69917 transitions. [2021-06-05 16:09:57,156 INFO L78 Accepts]: Start accepts. Automaton has 18685 states and 69917 transitions. Word has length 30 [2021-06-05 16:09:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:57,156 INFO L482 AbstractCegarLoop]: Abstraction has 18685 states and 69917 transitions. [2021-06-05 16:09:57,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18685 states and 69917 transitions. [2021-06-05 16:09:57,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:57,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:57,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:57,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:57,382 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:57,382 INFO L82 PathProgramCache]: Analyzing trace with hash -102437964, now seen corresponding path program 128 times [2021-06-05 16:09:57,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:57,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846150006] [2021-06-05 16:09:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:57,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846150006] [2021-06-05 16:09:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846150006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928236683] [2021-06-05 16:09:57,400 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:57,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:09:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:57,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:57,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928236683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:57,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:57,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:09:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210922471] [2021-06-05 16:09:57,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:09:57,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:09:57,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:09:57,451 INFO L87 Difference]: Start difference. First operand 18685 states and 69917 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:57,579 INFO L93 Difference]: Finished difference Result 20773 states and 75980 transitions. [2021-06-05 16:09:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:09:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:57,619 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 16:09:57,619 INFO L226 Difference]: Without dead ends: 20731 [2021-06-05 16:09:57,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:09:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20731 states. [2021-06-05 16:09:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20731 to 17544. [2021-06-05 16:09:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17544 states, 17543 states have (on average 3.7447414923331244) internal successors, (65694), 17543 states have internal predecessors, (65694), 0 states have call successors, (0), 0 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 16:09:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17544 states to 17544 states and 65694 transitions. [2021-06-05 16:09:57,898 INFO L78 Accepts]: Start accepts. Automaton has 17544 states and 65694 transitions. Word has length 30 [2021-06-05 16:09:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:57,899 INFO L482 AbstractCegarLoop]: Abstraction has 17544 states and 65694 transitions. [2021-06-05 16:09:57,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17544 states and 65694 transitions. [2021-06-05 16:09:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:57,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:57,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:58,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:58,124 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:58,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1557721912, now seen corresponding path program 129 times [2021-06-05 16:09:58,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:58,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72500371] [2021-06-05 16:09:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:09:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:09:58,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:09:58,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72500371] [2021-06-05 16:09:58,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72500371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:58,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770742736] [2021-06-05 16:09:58,152 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:58,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:09:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:09:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:09:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:09:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:09:58,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770742736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:09:58,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:09:58,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 16:09:58,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790911612] [2021-06-05 16:09:58,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:09:58,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:09:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:09:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:09:58,225 INFO L87 Difference]: Start difference. First operand 17544 states and 65694 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:09:59,143 INFO L93 Difference]: Finished difference Result 34966 states and 125269 transitions. [2021-06-05 16:09:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:09:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:09:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:09:59,218 INFO L225 Difference]: With dead ends: 34966 [2021-06-05 16:09:59,218 INFO L226 Difference]: Without dead ends: 34576 [2021-06-05 16:09:59,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=1120, Invalid=4282, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:09:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34576 states. [2021-06-05 16:09:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34576 to 24016. [2021-06-05 16:09:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24016 states, 24015 states have (on average 3.765521549031855) internal successors, (90429), 24015 states have internal predecessors, (90429), 0 states have call successors, (0), 0 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 16:09:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24016 states to 24016 states and 90429 transitions. [2021-06-05 16:09:59,763 INFO L78 Accepts]: Start accepts. Automaton has 24016 states and 90429 transitions. Word has length 30 [2021-06-05 16:09:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:09:59,763 INFO L482 AbstractCegarLoop]: Abstraction has 24016 states and 90429 transitions. [2021-06-05 16:09:59,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24016 states and 90429 transitions. [2021-06-05 16:09:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:09:59,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:09:59,795 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:09:59,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:59,995 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:09:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:09:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash 155608238, now seen corresponding path program 130 times [2021-06-05 16:09:59,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:09:59,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264433593] [2021-06-05 16:09:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:09:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:00,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264433593] [2021-06-05 16:10:00,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264433593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:00,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139869195] [2021-06-05 16:10:00,014 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:00,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:00,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139869195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:00,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:00,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:00,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637171445] [2021-06-05 16:10:00,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:00,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:00,072 INFO L87 Difference]: Start difference. First operand 24016 states and 90429 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:00,273 INFO L93 Difference]: Finished difference Result 40420 states and 148635 transitions. [2021-06-05 16:10:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:00,358 INFO L225 Difference]: With dead ends: 40420 [2021-06-05 16:10:00,358 INFO L226 Difference]: Without dead ends: 40404 [2021-06-05 16:10:00,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40404 states. [2021-06-05 16:10:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40404 to 31559. [2021-06-05 16:10:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31559 states, 31558 states have (on average 3.8120286456682932) internal successors, (120300), 31558 states have internal predecessors, (120300), 0 states have call successors, (0), 0 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 16:10:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 120300 transitions. [2021-06-05 16:10:00,947 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 120300 transitions. Word has length 30 [2021-06-05 16:10:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:00,947 INFO L482 AbstractCegarLoop]: Abstraction has 31559 states and 120300 transitions. [2021-06-05 16:10:00,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 120300 transitions. [2021-06-05 16:10:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:00,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:00,993 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:01,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 16:10:01,194 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash -422729102, now seen corresponding path program 131 times [2021-06-05 16:10:01,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:01,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720602583] [2021-06-05 16:10:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:01,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720602583] [2021-06-05 16:10:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720602583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:01,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571819583] [2021-06-05 16:10:01,217 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:01,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:10:01,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:01,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:01,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:01,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571819583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:01,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:01,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:01,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917302141] [2021-06-05 16:10:01,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:01,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:01,267 INFO L87 Difference]: Start difference. First operand 31559 states and 120300 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:01,617 INFO L93 Difference]: Finished difference Result 37745 states and 141963 transitions. [2021-06-05 16:10:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:10:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:01,700 INFO L225 Difference]: With dead ends: 37745 [2021-06-05 16:10:01,700 INFO L226 Difference]: Without dead ends: 37705 [2021-06-05 16:10:01,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:10:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37705 states. [2021-06-05 16:10:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37705 to 32221. [2021-06-05 16:10:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32221 states, 32220 states have (on average 3.821787709497207) internal successors, (123138), 32220 states have internal predecessors, (123138), 0 states have call successors, (0), 0 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 16:10:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32221 states to 32221 states and 123138 transitions. [2021-06-05 16:10:02,476 INFO L78 Accepts]: Start accepts. Automaton has 32221 states and 123138 transitions. Word has length 30 [2021-06-05 16:10:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:02,476 INFO L482 AbstractCegarLoop]: Abstraction has 32221 states and 123138 transitions. [2021-06-05 16:10:02,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 32221 states and 123138 transitions. [2021-06-05 16:10:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:02,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:02,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:02,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 16:10:02,728 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:02,729 INFO L82 PathProgramCache]: Analyzing trace with hash 736974234, now seen corresponding path program 132 times [2021-06-05 16:10:02,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:02,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669041618] [2021-06-05 16:10:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:02,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:02,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669041618] [2021-06-05 16:10:02,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669041618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:02,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752723158] [2021-06-05 16:10:02,747 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:02,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:10:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:02,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752723158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:02,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:02,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557392897] [2021-06-05 16:10:02,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:02,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:02,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:02,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:02,805 INFO L87 Difference]: Start difference. First operand 32221 states and 123138 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:03,044 INFO L93 Difference]: Finished difference Result 37446 states and 139719 transitions. [2021-06-05 16:10:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:03,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:03,135 INFO L225 Difference]: With dead ends: 37446 [2021-06-05 16:10:03,135 INFO L226 Difference]: Without dead ends: 37436 [2021-06-05 16:10:03,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37436 states. [2021-06-05 16:10:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37436 to 32725. [2021-06-05 16:10:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32725 states, 32724 states have (on average 3.8117283950617282) internal successors, (124735), 32724 states have internal predecessors, (124735), 0 states have call successors, (0), 0 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 16:10:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32725 states to 32725 states and 124735 transitions. [2021-06-05 16:10:03,948 INFO L78 Accepts]: Start accepts. Automaton has 32725 states and 124735 transitions. Word has length 30 [2021-06-05 16:10:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:03,948 INFO L482 AbstractCegarLoop]: Abstraction has 32725 states and 124735 transitions. [2021-06-05 16:10:03,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32725 states and 124735 transitions. [2021-06-05 16:10:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:03,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:03,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:04,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:04,197 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -638854596, now seen corresponding path program 133 times [2021-06-05 16:10:04,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179698041] [2021-06-05 16:10:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:04,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:04,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179698041] [2021-06-05 16:10:04,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179698041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:04,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69012719] [2021-06-05 16:10:04,231 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:04,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:04,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69012719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:04,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:04,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:04,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517492476] [2021-06-05 16:10:04,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:04,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:04,289 INFO L87 Difference]: Start difference. First operand 32725 states and 124735 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:04,627 INFO L93 Difference]: Finished difference Result 38546 states and 142423 transitions. [2021-06-05 16:10:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:10:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:04,728 INFO L225 Difference]: With dead ends: 38546 [2021-06-05 16:10:04,728 INFO L226 Difference]: Without dead ends: 38456 [2021-06-05 16:10:04,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:10:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38456 states. [2021-06-05 16:10:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38456 to 29232. [2021-06-05 16:10:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29232 states, 29231 states have (on average 3.7868016831446067) internal successors, (110692), 29231 states have internal predecessors, (110692), 0 states have call successors, (0), 0 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 16:10:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29232 states to 29232 states and 110692 transitions. [2021-06-05 16:10:05,515 INFO L78 Accepts]: Start accepts. Automaton has 29232 states and 110692 transitions. Word has length 30 [2021-06-05 16:10:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:05,515 INFO L482 AbstractCegarLoop]: Abstraction has 29232 states and 110692 transitions. [2021-06-05 16:10:05,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 29232 states and 110692 transitions. [2021-06-05 16:10:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:05,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:05,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:05,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 16:10:05,759 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:05,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:05,759 INFO L82 PathProgramCache]: Analyzing trace with hash 331177430, now seen corresponding path program 134 times [2021-06-05 16:10:05,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:05,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695391507] [2021-06-05 16:10:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:05,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695391507] [2021-06-05 16:10:05,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695391507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:05,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347232910] [2021-06-05 16:10:05,779 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:05,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:10:05,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:05,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:05,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347232910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:05,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:05,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:10:05,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564894217] [2021-06-05 16:10:05,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:05,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:05,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:05,832 INFO L87 Difference]: Start difference. First operand 29232 states and 110692 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:06,040 INFO L93 Difference]: Finished difference Result 33404 states and 122776 transitions. [2021-06-05 16:10:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:06,235 INFO L225 Difference]: With dead ends: 33404 [2021-06-05 16:10:06,235 INFO L226 Difference]: Without dead ends: 33390 [2021-06-05 16:10:06,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33390 states. [2021-06-05 16:10:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33390 to 28626. [2021-06-05 16:10:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28626 states, 28625 states have (on average 3.7515458515283844) internal successors, (107388), 28625 states have internal predecessors, (107388), 0 states have call successors, (0), 0 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 16:10:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28626 states to 28626 states and 107388 transitions. [2021-06-05 16:10:06,788 INFO L78 Accepts]: Start accepts. Automaton has 28626 states and 107388 transitions. Word has length 30 [2021-06-05 16:10:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:06,788 INFO L482 AbstractCegarLoop]: Abstraction has 28626 states and 107388 transitions. [2021-06-05 16:10:06,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 28626 states and 107388 transitions. [2021-06-05 16:10:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:06,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:06,831 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:07,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:07,032 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash 899933846, now seen corresponding path program 135 times [2021-06-05 16:10:07,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:07,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432663550] [2021-06-05 16:10:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432663550] [2021-06-05 16:10:07,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432663550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:07,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409291921] [2021-06-05 16:10:07,054 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:07,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:10:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:07,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409291921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:07,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:07,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 16:10:07,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791937567] [2021-06-05 16:10:07,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:10:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:10:07,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:10:07,140 INFO L87 Difference]: Start difference. First operand 28626 states and 107388 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:08,363 INFO L93 Difference]: Finished difference Result 56380 states and 199143 transitions. [2021-06-05 16:10:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:10:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:08,499 INFO L225 Difference]: With dead ends: 56380 [2021-06-05 16:10:08,500 INFO L226 Difference]: Without dead ends: 55515 [2021-06-05 16:10:08,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 544.0ms TimeCoverageRelationStatistics Valid=1112, Invalid=3858, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:10:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55515 states. [2021-06-05 16:10:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55515 to 28782. [2021-06-05 16:10:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28782 states, 28781 states have (on average 3.7031027413918904) internal successors, (106579), 28781 states have internal predecessors, (106579), 0 states have call successors, (0), 0 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 16:10:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28782 states to 28782 states and 106579 transitions. [2021-06-05 16:10:09,381 INFO L78 Accepts]: Start accepts. Automaton has 28782 states and 106579 transitions. Word has length 30 [2021-06-05 16:10:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:09,381 INFO L482 AbstractCegarLoop]: Abstraction has 28782 states and 106579 transitions. [2021-06-05 16:10:09,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28782 states and 106579 transitions. [2021-06-05 16:10:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:09,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:09,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:09,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 16:10:09,624 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1381936088, now seen corresponding path program 136 times [2021-06-05 16:10:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:09,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802310622] [2021-06-05 16:10:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:09,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:09,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802310622] [2021-06-05 16:10:09,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802310622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:09,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802720991] [2021-06-05 16:10:09,644 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:09,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:09,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802720991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:09,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:09,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 16:10:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247807388] [2021-06-05 16:10:09,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:10:09,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:10:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:09,713 INFO L87 Difference]: Start difference. First operand 28782 states and 106579 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 16:10:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:10,580 INFO L93 Difference]: Finished difference Result 46545 states and 165588 transitions. [2021-06-05 16:10:10,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:10:10,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 30 [2021-06-05 16:10:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:10,673 INFO L225 Difference]: With dead ends: 46545 [2021-06-05 16:10:10,673 INFO L226 Difference]: Without dead ends: 46370 [2021-06-05 16:10:10,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=669, Invalid=2301, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:10:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46370 states. [2021-06-05 16:10:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46370 to 30642. [2021-06-05 16:10:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30642 states, 30641 states have (on average 3.7180248686400574) internal successors, (113924), 30641 states have internal predecessors, (113924), 0 states have call successors, (0), 0 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 16:10:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30642 states to 30642 states and 113924 transitions. [2021-06-05 16:10:11,418 INFO L78 Accepts]: Start accepts. Automaton has 30642 states and 113924 transitions. Word has length 30 [2021-06-05 16:10:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:11,418 INFO L482 AbstractCegarLoop]: Abstraction has 30642 states and 113924 transitions. [2021-06-05 16:10:11,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 16:10:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30642 states and 113924 transitions. [2021-06-05 16:10:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:11,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:11,463 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:11,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:11,664 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1418419144, now seen corresponding path program 137 times [2021-06-05 16:10:11,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:11,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523943188] [2021-06-05 16:10:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:11,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523943188] [2021-06-05 16:10:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523943188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221712628] [2021-06-05 16:10:11,684 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:11,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:10:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:11,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:10:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:11,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221712628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:11,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:11,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:11,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458157642] [2021-06-05 16:10:11,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:11,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:11,758 INFO L87 Difference]: Start difference. First operand 30642 states and 113924 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:12,179 INFO L93 Difference]: Finished difference Result 39073 states and 143388 transitions. [2021-06-05 16:10:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:10:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:12,295 INFO L225 Difference]: With dead ends: 39073 [2021-06-05 16:10:12,295 INFO L226 Difference]: Without dead ends: 39036 [2021-06-05 16:10:12,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:10:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39036 states. [2021-06-05 16:10:12,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39036 to 35796. [2021-06-05 16:10:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 3.734655678167342) internal successors, (133682), 35795 states have internal predecessors, (133682), 0 states have call successors, (0), 0 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 16:10:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 133682 transitions. [2021-06-05 16:10:12,950 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 133682 transitions. Word has length 30 [2021-06-05 16:10:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:12,950 INFO L482 AbstractCegarLoop]: Abstraction has 35796 states and 133682 transitions. [2021-06-05 16:10:12,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 133682 transitions. [2021-06-05 16:10:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:12,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:12,998 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:13,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:13,198 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:13,199 INFO L82 PathProgramCache]: Analyzing trace with hash -198212408, now seen corresponding path program 138 times [2021-06-05 16:10:13,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:13,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237830938] [2021-06-05 16:10:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:13,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:13,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237830938] [2021-06-05 16:10:13,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237830938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:13,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027053055] [2021-06-05 16:10:13,219 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:13,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:10:13,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:13,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027053055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:13,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:13,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 16:10:13,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263642242] [2021-06-05 16:10:13,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:10:13,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:10:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:13,288 INFO L87 Difference]: Start difference. First operand 35796 states and 133682 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:10:13,807 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 16:10:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:14,227 INFO L93 Difference]: Finished difference Result 52098 states and 181980 transitions. [2021-06-05 16:10:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:10:14,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:10:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:14,345 INFO L225 Difference]: With dead ends: 52098 [2021-06-05 16:10:14,345 INFO L226 Difference]: Without dead ends: 51998 [2021-06-05 16:10:14,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 550.3ms TimeCoverageRelationStatistics Valid=948, Invalid=3474, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:10:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51998 states. [2021-06-05 16:10:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51998 to 33705. [2021-06-05 16:10:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33705 states, 33704 states have (on average 3.711250890102065) internal successors, (125084), 33704 states have internal predecessors, (125084), 0 states have call successors, (0), 0 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 16:10:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33705 states to 33705 states and 125084 transitions. [2021-06-05 16:10:15,426 INFO L78 Accepts]: Start accepts. Automaton has 33705 states and 125084 transitions. Word has length 30 [2021-06-05 16:10:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:15,426 INFO L482 AbstractCegarLoop]: Abstraction has 33705 states and 125084 transitions. [2021-06-05 16:10:15,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:10:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 33705 states and 125084 transitions. [2021-06-05 16:10:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:15,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:15,472 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:15,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:15,672 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1470112996, now seen corresponding path program 139 times [2021-06-05 16:10:15,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:15,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975446419] [2021-06-05 16:10:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:10:15,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:15,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975446419] [2021-06-05 16:10:15,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975446419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:15,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563316758] [2021-06-05 16:10:15,695 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:15,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563316758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:15,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:15,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 16:10:15,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514565767] [2021-06-05 16:10:15,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:10:15,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:10:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:15,773 INFO L87 Difference]: Start difference. First operand 33705 states and 125084 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:10:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:16,793 INFO L93 Difference]: Finished difference Result 49885 states and 171670 transitions. [2021-06-05 16:10:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:10:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:10:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:16,899 INFO L225 Difference]: With dead ends: 49885 [2021-06-05 16:10:16,899 INFO L226 Difference]: Without dead ends: 49560 [2021-06-05 16:10:16,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 483.3ms TimeCoverageRelationStatistics Valid=1199, Invalid=3771, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:10:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49560 states. [2021-06-05 16:10:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49560 to 33560. [2021-06-05 16:10:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33560 states, 33559 states have (on average 3.6864328496081527) internal successors, (123713), 33559 states have internal predecessors, (123713), 0 states have call successors, (0), 0 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 16:10:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33560 states to 33560 states and 123713 transitions. [2021-06-05 16:10:17,669 INFO L78 Accepts]: Start accepts. Automaton has 33560 states and 123713 transitions. Word has length 30 [2021-06-05 16:10:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:17,669 INFO L482 AbstractCegarLoop]: Abstraction has 33560 states and 123713 transitions. [2021-06-05 16:10:17,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:10:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33560 states and 123713 transitions. [2021-06-05 16:10:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:17,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:17,715 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:17,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 16:10:17,915 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash -415712398, now seen corresponding path program 140 times [2021-06-05 16:10:17,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428924249] [2021-06-05 16:10:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:17,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:17,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428924249] [2021-06-05 16:10:17,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428924249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:17,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445132064] [2021-06-05 16:10:17,937 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:17,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:10:17,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:17,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445132064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:17,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:17,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:10:17,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792938072] [2021-06-05 16:10:17,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:17,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:17,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:17,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:17,990 INFO L87 Difference]: Start difference. First operand 33560 states and 123713 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:18,391 INFO L93 Difference]: Finished difference Result 36661 states and 132702 transitions. [2021-06-05 16:10:18,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:18,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:18,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:18,474 INFO L225 Difference]: With dead ends: 36661 [2021-06-05 16:10:18,475 INFO L226 Difference]: Without dead ends: 36504 [2021-06-05 16:10:18,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:10:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36504 states. [2021-06-05 16:10:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36504 to 33273. [2021-06-05 16:10:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33273 states, 33272 states have (on average 3.6911817744650155) internal successors, (122813), 33272 states have internal predecessors, (122813), 0 states have call successors, (0), 0 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 16:10:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33273 states to 33273 states and 122813 transitions. [2021-06-05 16:10:19,264 INFO L78 Accepts]: Start accepts. Automaton has 33273 states and 122813 transitions. Word has length 30 [2021-06-05 16:10:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:19,264 INFO L482 AbstractCegarLoop]: Abstraction has 33273 states and 122813 transitions. [2021-06-05 16:10:19,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 33273 states and 122813 transitions. [2021-06-05 16:10:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:19,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:19,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:19,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 16:10:19,529 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -947319082, now seen corresponding path program 141 times [2021-06-05 16:10:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:19,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066624241] [2021-06-05 16:10:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:19,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066624241] [2021-06-05 16:10:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066624241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34344304] [2021-06-05 16:10:19,549 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:19,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:10:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34344304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:19,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:19,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:10:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820653826] [2021-06-05 16:10:19,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:19,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:19,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:19,610 INFO L87 Difference]: Start difference. First operand 33273 states and 122813 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:19,831 INFO L93 Difference]: Finished difference Result 42007 states and 149175 transitions. [2021-06-05 16:10:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:19,916 INFO L225 Difference]: With dead ends: 42007 [2021-06-05 16:10:19,916 INFO L226 Difference]: Without dead ends: 41957 [2021-06-05 16:10:19,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41957 states. [2021-06-05 16:10:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41957 to 33022. [2021-06-05 16:10:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33022 states, 33021 states have (on average 3.6783561975712424) internal successors, (121463), 33021 states have internal predecessors, (121463), 0 states have call successors, (0), 0 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 16:10:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33022 states to 33022 states and 121463 transitions. [2021-06-05 16:10:20,579 INFO L78 Accepts]: Start accepts. Automaton has 33022 states and 121463 transitions. Word has length 30 [2021-06-05 16:10:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:20,579 INFO L482 AbstractCegarLoop]: Abstraction has 33022 states and 121463 transitions. [2021-06-05 16:10:20,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 33022 states and 121463 transitions. [2021-06-05 16:10:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:20,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:20,623 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:20,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 16:10:20,825 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:20,825 INFO L82 PathProgramCache]: Analyzing trace with hash -88577934, now seen corresponding path program 142 times [2021-06-05 16:10:20,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:20,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897274765] [2021-06-05 16:10:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:20,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:20,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897274765] [2021-06-05 16:10:20,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897274765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:20,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8028590] [2021-06-05 16:10:20,845 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:20,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:20,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8028590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:20,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:20,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:20,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098278966] [2021-06-05 16:10:20,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:20,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:20,896 INFO L87 Difference]: Start difference. First operand 33022 states and 121463 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:21,102 INFO L93 Difference]: Finished difference Result 40530 states and 147343 transitions. [2021-06-05 16:10:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:10:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:21,190 INFO L225 Difference]: With dead ends: 40530 [2021-06-05 16:10:21,190 INFO L226 Difference]: Without dead ends: 40477 [2021-06-05 16:10:21,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:10:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40477 states. [2021-06-05 16:10:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40477 to 37757. [2021-06-05 16:10:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37757 states, 37756 states have (on average 3.6998622735459263) internal successors, (139692), 37756 states have internal predecessors, (139692), 0 states have call successors, (0), 0 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 16:10:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37757 states to 37757 states and 139692 transitions. [2021-06-05 16:10:22,127 INFO L78 Accepts]: Start accepts. Automaton has 37757 states and 139692 transitions. Word has length 30 [2021-06-05 16:10:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:22,127 INFO L482 AbstractCegarLoop]: Abstraction has 37757 states and 139692 transitions. [2021-06-05 16:10:22,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37757 states and 139692 transitions. [2021-06-05 16:10:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:22,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:22,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:22,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 16:10:22,391 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1071125402, now seen corresponding path program 143 times [2021-06-05 16:10:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:22,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046868419] [2021-06-05 16:10:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:22,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046868419] [2021-06-05 16:10:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046868419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256354479] [2021-06-05 16:10:22,411 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:22,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:10:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256354479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:22,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:22,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3241257] [2021-06-05 16:10:22,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:22,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:22,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:22,470 INFO L87 Difference]: Start difference. First operand 37757 states and 139692 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:22,720 INFO L93 Difference]: Finished difference Result 42092 states and 152818 transitions. [2021-06-05 16:10:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:22,814 INFO L225 Difference]: With dead ends: 42092 [2021-06-05 16:10:22,814 INFO L226 Difference]: Without dead ends: 42082 [2021-06-05 16:10:22,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42082 states. [2021-06-05 16:10:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42082 to 37894. [2021-06-05 16:10:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37894 states, 37893 states have (on average 3.698255614493442) internal successors, (140138), 37893 states have internal predecessors, (140138), 0 states have call successors, (0), 0 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 16:10:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37894 states to 37894 states and 140138 transitions. [2021-06-05 16:10:23,624 INFO L78 Accepts]: Start accepts. Automaton has 37894 states and 140138 transitions. Word has length 30 [2021-06-05 16:10:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:23,624 INFO L482 AbstractCegarLoop]: Abstraction has 37894 states and 140138 transitions. [2021-06-05 16:10:23,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 37894 states and 140138 transitions. [2021-06-05 16:10:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:23,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:23,675 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:23,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:23,882 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 665328598, now seen corresponding path program 144 times [2021-06-05 16:10:23,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:23,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112370173] [2021-06-05 16:10:23,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:23,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112370173] [2021-06-05 16:10:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112370173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542134541] [2021-06-05 16:10:23,909 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:23,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:10:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:10:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:10:23,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542134541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:23,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:23,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 16:10:23,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732963661] [2021-06-05 16:10:23,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:10:23,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:10:23,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:23,993 INFO L87 Difference]: Start difference. First operand 37894 states and 140138 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 16:10:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:25,150 INFO L93 Difference]: Finished difference Result 72033 states and 252300 transitions. [2021-06-05 16:10:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:10:25,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 30 [2021-06-05 16:10:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:25,322 INFO L225 Difference]: With dead ends: 72033 [2021-06-05 16:10:25,322 INFO L226 Difference]: Without dead ends: 71258 [2021-06-05 16:10:25,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=1029, Invalid=3663, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:10:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71258 states. [2021-06-05 16:10:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71258 to 44329. [2021-06-05 16:10:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44329 states, 44328 states have (on average 3.669915177765746) internal successors, (162680), 44328 states have internal predecessors, (162680), 0 states have call successors, (0), 0 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 16:10:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44329 states to 44329 states and 162680 transitions. [2021-06-05 16:10:26,380 INFO L78 Accepts]: Start accepts. Automaton has 44329 states and 162680 transitions. Word has length 30 [2021-06-05 16:10:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:26,380 INFO L482 AbstractCegarLoop]: Abstraction has 44329 states and 162680 transitions. [2021-06-05 16:10:26,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 16:10:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 44329 states and 162680 transitions. [2021-06-05 16:10:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:26,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:26,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:26,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 16:10:26,636 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -536421578, now seen corresponding path program 145 times [2021-06-05 16:10:26,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:26,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477481255] [2021-06-05 16:10:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:26,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477481255] [2021-06-05 16:10:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477481255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619673682] [2021-06-05 16:10:26,654 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:26,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619673682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:26,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:26,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:10:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816309109] [2021-06-05 16:10:26,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:26,709 INFO L87 Difference]: Start difference. First operand 44329 states and 162680 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:27,261 INFO L93 Difference]: Finished difference Result 61744 states and 222077 transitions. [2021-06-05 16:10:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:27,414 INFO L225 Difference]: With dead ends: 61744 [2021-06-05 16:10:27,414 INFO L226 Difference]: Without dead ends: 61646 [2021-06-05 16:10:27,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:10:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-06-05 16:10:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 53362. [2021-06-05 16:10:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53362 states, 53361 states have (on average 3.6997057776278557) internal successors, (197420), 53361 states have internal predecessors, (197420), 0 states have call successors, (0), 0 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 16:10:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53362 states to 53362 states and 197420 transitions. [2021-06-05 16:10:28,556 INFO L78 Accepts]: Start accepts. Automaton has 53362 states and 197420 transitions. Word has length 30 [2021-06-05 16:10:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:28,556 INFO L482 AbstractCegarLoop]: Abstraction has 53362 states and 197420 transitions. [2021-06-05 16:10:28,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 53362 states and 197420 transitions. [2021-06-05 16:10:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:28,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:28,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:28,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:28,822 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1862300086, now seen corresponding path program 146 times [2021-06-05 16:10:28,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:28,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388856863] [2021-06-05 16:10:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:28,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:28,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388856863] [2021-06-05 16:10:28,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388856863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:28,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820336520] [2021-06-05 16:10:28,848 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:10:28,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:28,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820336520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:28,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:28,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361849675] [2021-06-05 16:10:28,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:28,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:28,900 INFO L87 Difference]: Start difference. First operand 53362 states and 197420 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:29,465 INFO L93 Difference]: Finished difference Result 63054 states and 226313 transitions. [2021-06-05 16:10:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:29,610 INFO L225 Difference]: With dead ends: 63054 [2021-06-05 16:10:29,610 INFO L226 Difference]: Without dead ends: 63038 [2021-06-05 16:10:29,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63038 states. [2021-06-05 16:10:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63038 to 53386. [2021-06-05 16:10:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 3.696150604102276) internal successors, (197319), 53385 states have internal predecessors, (197319), 0 states have call successors, (0), 0 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 16:10:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 197319 transitions. [2021-06-05 16:10:30,664 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 197319 transitions. Word has length 30 [2021-06-05 16:10:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:30,664 INFO L482 AbstractCegarLoop]: Abstraction has 53386 states and 197319 transitions. [2021-06-05 16:10:30,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 197319 transitions. [2021-06-05 16:10:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:30,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:30,729 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:30,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 16:10:30,929 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1533523770, now seen corresponding path program 147 times [2021-06-05 16:10:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:30,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232433841] [2021-06-05 16:10:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:30,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:30,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232433841] [2021-06-05 16:10:30,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232433841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:30,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560717451] [2021-06-05 16:10:30,951 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:30,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:10:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:31,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560717451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:31,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:31,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:10:31,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336716064] [2021-06-05 16:10:31,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:10:31,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:10:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:10:31,006 INFO L87 Difference]: Start difference. First operand 53386 states and 197319 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:31,326 INFO L93 Difference]: Finished difference Result 61002 states and 219648 transitions. [2021-06-05 16:10:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:10:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:31,791 INFO L225 Difference]: With dead ends: 61002 [2021-06-05 16:10:31,791 INFO L226 Difference]: Without dead ends: 60872 [2021-06-05 16:10:31,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:10:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60872 states. [2021-06-05 16:10:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60872 to 54086. [2021-06-05 16:10:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54086 states, 54085 states have (on average 3.6847554774891376) internal successors, (199290), 54085 states have internal predecessors, (199290), 0 states have call successors, (0), 0 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 16:10:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54086 states to 54086 states and 199290 transitions. [2021-06-05 16:10:33,031 INFO L78 Accepts]: Start accepts. Automaton has 54086 states and 199290 transitions. Word has length 30 [2021-06-05 16:10:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:33,031 INFO L482 AbstractCegarLoop]: Abstraction has 54086 states and 199290 transitions. [2021-06-05 16:10:33,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 54086 states and 199290 transitions. [2021-06-05 16:10:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:33,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:33,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:33,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 16:10:33,299 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1777851450, now seen corresponding path program 148 times [2021-06-05 16:10:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:33,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172468896] [2021-06-05 16:10:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:33,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172468896] [2021-06-05 16:10:33,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172468896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:33,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018577818] [2021-06-05 16:10:33,325 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:33,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:33,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:10:33,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:33,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018577818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:33,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:33,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 16:10:33,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413586436] [2021-06-05 16:10:33,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:10:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:33,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:10:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:10:33,380 INFO L87 Difference]: Start difference. First operand 54086 states and 199290 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:33,716 INFO L93 Difference]: Finished difference Result 56541 states and 205849 transitions. [2021-06-05 16:10:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:10:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:33,846 INFO L225 Difference]: With dead ends: 56541 [2021-06-05 16:10:33,846 INFO L226 Difference]: Without dead ends: 56380 [2021-06-05 16:10:33,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56380 states. [2021-06-05 16:10:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56380 to 51805. [2021-06-05 16:10:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51805 states, 51804 states have (on average 3.7006987877383986) internal successors, (191711), 51804 states have internal predecessors, (191711), 0 states have call successors, (0), 0 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 16:10:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51805 states to 51805 states and 191711 transitions. [2021-06-05 16:10:34,906 INFO L78 Accepts]: Start accepts. Automaton has 51805 states and 191711 transitions. Word has length 30 [2021-06-05 16:10:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:34,906 INFO L482 AbstractCegarLoop]: Abstraction has 51805 states and 191711 transitions. [2021-06-05 16:10:34,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 51805 states and 191711 transitions. [2021-06-05 16:10:34,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:34,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:34,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:35,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:35,170 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1134016742, now seen corresponding path program 149 times [2021-06-05 16:10:35,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:35,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205134015] [2021-06-05 16:10:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:35,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205134015] [2021-06-05 16:10:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205134015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920935967] [2021-06-05 16:10:35,193 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:35,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:10:35,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:35,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920935967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:35,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:35,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:10:35,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115081115] [2021-06-05 16:10:35,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:10:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:10:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:10:35,251 INFO L87 Difference]: Start difference. First operand 51805 states and 191711 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:35,796 INFO L93 Difference]: Finished difference Result 57747 states and 209253 transitions. [2021-06-05 16:10:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:35,931 INFO L225 Difference]: With dead ends: 57747 [2021-06-05 16:10:35,931 INFO L226 Difference]: Without dead ends: 57733 [2021-06-05 16:10:35,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:10:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57733 states. [2021-06-05 16:10:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57733 to 46706. [2021-06-05 16:10:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46706 states, 46705 states have (on average 3.6757092388395245) internal successors, (171674), 46705 states have internal predecessors, (171674), 0 states have call successors, (0), 0 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 16:10:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46706 states to 46706 states and 171674 transitions. [2021-06-05 16:10:36,927 INFO L78 Accepts]: Start accepts. Automaton has 46706 states and 171674 transitions. Word has length 30 [2021-06-05 16:10:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:36,927 INFO L482 AbstractCegarLoop]: Abstraction has 46706 states and 171674 transitions. [2021-06-05 16:10:36,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46706 states and 171674 transitions. [2021-06-05 16:10:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:36,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:36,990 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:37,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 16:10:37,191 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:37,191 INFO L82 PathProgramCache]: Analyzing trace with hash 770710102, now seen corresponding path program 150 times [2021-06-05 16:10:37,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:37,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838246775] [2021-06-05 16:10:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:37,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:37,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838246775] [2021-06-05 16:10:37,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838246775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:37,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209628364] [2021-06-05 16:10:37,216 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:37,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:10:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:37,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:37,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209628364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:37,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:37,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:10:37,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731065689] [2021-06-05 16:10:37,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:37,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:37,274 INFO L87 Difference]: Start difference. First operand 46706 states and 171674 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:37,595 INFO L93 Difference]: Finished difference Result 50471 states and 182462 transitions. [2021-06-05 16:10:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:37,723 INFO L225 Difference]: With dead ends: 50471 [2021-06-05 16:10:37,724 INFO L226 Difference]: Without dead ends: 50324 [2021-06-05 16:10:37,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:10:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50324 states. [2021-06-05 16:10:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50324 to 46418. [2021-06-05 16:10:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46418 states, 46417 states have (on average 3.6780705345024454) internal successors, (170725), 46417 states have internal predecessors, (170725), 0 states have call successors, (0), 0 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 16:10:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46418 states to 46418 states and 170725 transitions. [2021-06-05 16:10:38,770 INFO L78 Accepts]: Start accepts. Automaton has 46418 states and 170725 transitions. Word has length 30 [2021-06-05 16:10:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:38,770 INFO L482 AbstractCegarLoop]: Abstraction has 46418 states and 170725 transitions. [2021-06-05 16:10:38,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46418 states and 170725 transitions. [2021-06-05 16:10:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:38,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:38,827 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:39,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 16:10:39,027 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:39,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1609551026, now seen corresponding path program 151 times [2021-06-05 16:10:39,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:39,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598976177] [2021-06-05 16:10:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:39,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:39,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598976177] [2021-06-05 16:10:39,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598976177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:39,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768145068] [2021-06-05 16:10:39,053 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:10:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:39,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768145068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:39,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:39,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 16:10:39,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000741757] [2021-06-05 16:10:39,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:10:39,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:10:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:10:39,109 INFO L87 Difference]: Start difference. First operand 46418 states and 170725 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:39,701 INFO L93 Difference]: Finished difference Result 49897 states and 180569 transitions. [2021-06-05 16:10:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:10:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:39,815 INFO L225 Difference]: With dead ends: 49897 [2021-06-05 16:10:39,815 INFO L226 Difference]: Without dead ends: 49814 [2021-06-05 16:10:39,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:10:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49814 states. [2021-06-05 16:10:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49814 to 46037. [2021-06-05 16:10:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46037 states, 46036 states have (on average 3.680424015987488) internal successors, (169432), 46036 states have internal predecessors, (169432), 0 states have call successors, (0), 0 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 16:10:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46037 states to 46037 states and 169432 transitions. [2021-06-05 16:10:40,786 INFO L78 Accepts]: Start accepts. Automaton has 46037 states and 169432 transitions. Word has length 30 [2021-06-05 16:10:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:40,786 INFO L482 AbstractCegarLoop]: Abstraction has 46037 states and 169432 transitions. [2021-06-05 16:10:40,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46037 states and 169432 transitions. [2021-06-05 16:10:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:40,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:40,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:41,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:41,041 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash -595123178, now seen corresponding path program 152 times [2021-06-05 16:10:41,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:41,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991079315] [2021-06-05 16:10:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:41,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991079315] [2021-06-05 16:10:41,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991079315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:41,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105124294] [2021-06-05 16:10:41,059 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:41,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:10:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:41,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:41,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105124294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:41,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:41,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:41,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709014902] [2021-06-05 16:10:41,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:41,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:41,110 INFO L87 Difference]: Start difference. First operand 46037 states and 169432 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:41,393 INFO L93 Difference]: Finished difference Result 58034 states and 211506 transitions. [2021-06-05 16:10:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:10:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:41,525 INFO L225 Difference]: With dead ends: 58034 [2021-06-05 16:10:41,525 INFO L226 Difference]: Without dead ends: 57997 [2021-06-05 16:10:41,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:10:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57997 states. [2021-06-05 16:10:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57997 to 54511. [2021-06-05 16:10:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54511 states, 54510 states have (on average 3.7023298477343607) internal successors, (201814), 54510 states have internal predecessors, (201814), 0 states have call successors, (0), 0 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 16:10:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54511 states to 54511 states and 201814 transitions. [2021-06-05 16:10:42,742 INFO L78 Accepts]: Start accepts. Automaton has 54511 states and 201814 transitions. Word has length 30 [2021-06-05 16:10:42,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:42,742 INFO L482 AbstractCegarLoop]: Abstraction has 54511 states and 201814 transitions. [2021-06-05 16:10:42,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 54511 states and 201814 transitions. [2021-06-05 16:10:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:42,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:42,815 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:43,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 16:10:43,016 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 368942536, now seen corresponding path program 153 times [2021-06-05 16:10:43,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:43,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788249003] [2021-06-05 16:10:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:10:43,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788249003] [2021-06-05 16:10:43,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788249003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521986642] [2021-06-05 16:10:43,050 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:43,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:10:43,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:10:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521986642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:43,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:43,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 16:10:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814821277] [2021-06-05 16:10:43,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:10:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:43,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:10:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:10:43,125 INFO L87 Difference]: Start difference. First operand 54511 states and 201814 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:44,340 INFO L93 Difference]: Finished difference Result 76071 states and 270587 transitions. [2021-06-05 16:10:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:10:44,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:44,514 INFO L225 Difference]: With dead ends: 76071 [2021-06-05 16:10:44,514 INFO L226 Difference]: Without dead ends: 76017 [2021-06-05 16:10:44,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:10:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76017 states. [2021-06-05 16:10:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76017 to 61077. [2021-06-05 16:10:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61077 states, 61076 states have (on average 3.715125417512607) internal successors, (226905), 61076 states have internal predecessors, (226905), 0 states have call successors, (0), 0 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 16:10:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61077 states to 61077 states and 226905 transitions. [2021-06-05 16:10:45,820 INFO L78 Accepts]: Start accepts. Automaton has 61077 states and 226905 transitions. Word has length 30 [2021-06-05 16:10:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:45,820 INFO L482 AbstractCegarLoop]: Abstraction has 61077 states and 226905 transitions. [2021-06-05 16:10:45,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 61077 states and 226905 transitions. [2021-06-05 16:10:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:45,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:45,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:46,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 16:10:46,107 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 361087944, now seen corresponding path program 154 times [2021-06-05 16:10:46,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:46,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933214011] [2021-06-05 16:10:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:46,396 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 16:10:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:46,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:46,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933214011] [2021-06-05 16:10:46,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933214011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:46,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801781399] [2021-06-05 16:10:46,437 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:46,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:10:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:10:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801781399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 16:10:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354616812] [2021-06-05 16:10:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:10:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:10:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:10:46,550 INFO L87 Difference]: Start difference. First operand 61077 states and 226905 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:46,898 INFO L93 Difference]: Finished difference Result 69205 states and 252584 transitions. [2021-06-05 16:10:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:10:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:47,057 INFO L225 Difference]: With dead ends: 69205 [2021-06-05 16:10:47,058 INFO L226 Difference]: Without dead ends: 69181 [2021-06-05 16:10:47,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:10:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69181 states. [2021-06-05 16:10:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69181 to 61746. [2021-06-05 16:10:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61746 states, 61745 states have (on average 3.7093691796906634) internal successors, (229035), 61745 states have internal predecessors, (229035), 0 states have call successors, (0), 0 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 16:10:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61746 states to 61746 states and 229035 transitions. [2021-06-05 16:10:48,447 INFO L78 Accepts]: Start accepts. Automaton has 61746 states and 229035 transitions. Word has length 30 [2021-06-05 16:10:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 61746 states and 229035 transitions. [2021-06-05 16:10:48,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 61746 states and 229035 transitions. [2021-06-05 16:10:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:10:48,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:48,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:48,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 16:10:48,741 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1851937992, now seen corresponding path program 155 times [2021-06-05 16:10:48,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:48,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518744000] [2021-06-05 16:10:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:48,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518744000] [2021-06-05 16:10:48,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518744000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242447031] [2021-06-05 16:10:48,778 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:48,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:10:48,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:48,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242447031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:48,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:48,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 16:10:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575908280] [2021-06-05 16:10:48,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:10:48,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:48,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:10:48,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:10:48,837 INFO L87 Difference]: Start difference. First operand 61746 states and 229035 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:49,430 INFO L93 Difference]: Finished difference Result 68985 states and 251648 transitions. [2021-06-05 16:10:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:10:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:49,595 INFO L225 Difference]: With dead ends: 68985 [2021-06-05 16:10:49,595 INFO L226 Difference]: Without dead ends: 68907 [2021-06-05 16:10:49,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:10:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68907 states. [2021-06-05 16:10:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68907 to 61549. [2021-06-05 16:10:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61549 states, 61548 states have (on average 3.703434717618769) internal successors, (227939), 61548 states have internal predecessors, (227939), 0 states have call successors, (0), 0 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 16:10:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61549 states to 61549 states and 227939 transitions. [2021-06-05 16:10:50,788 INFO L78 Accepts]: Start accepts. Automaton has 61549 states and 227939 transitions. Word has length 30 [2021-06-05 16:10:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:50,788 INFO L482 AbstractCegarLoop]: Abstraction has 61549 states and 227939 transitions. [2021-06-05 16:10:50,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 61549 states and 227939 transitions. [2021-06-05 16:10:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:10:50,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:50,882 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:51,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 16:10:51,082 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:51,082 INFO L82 PathProgramCache]: Analyzing trace with hash 239147384, now seen corresponding path program 156 times [2021-06-05 16:10:51,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:51,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420735030] [2021-06-05 16:10:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:51,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:51,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420735030] [2021-06-05 16:10:51,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420735030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:51,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377077969] [2021-06-05 16:10:51,102 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:51,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:10:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:10:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:51,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377077969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:51,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:51,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:10:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938401022] [2021-06-05 16:10:51,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:10:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:10:51,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:10:51,161 INFO L87 Difference]: Start difference. First operand 61549 states and 227939 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:51,553 INFO L93 Difference]: Finished difference Result 87148 states and 316679 transitions. [2021-06-05 16:10:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:10:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:10:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:52,154 INFO L225 Difference]: With dead ends: 87148 [2021-06-05 16:10:52,154 INFO L226 Difference]: Without dead ends: 87117 [2021-06-05 16:10:52,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87117 states. [2021-06-05 16:10:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87117 to 74655. [2021-06-05 16:10:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74655 states, 74654 states have (on average 3.7167064055509416) internal successors, (277467), 74654 states have internal predecessors, (277467), 0 states have call successors, (0), 0 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 16:10:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74655 states to 74655 states and 277467 transitions. [2021-06-05 16:10:53,702 INFO L78 Accepts]: Start accepts. Automaton has 74655 states and 277467 transitions. Word has length 32 [2021-06-05 16:10:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:53,702 INFO L482 AbstractCegarLoop]: Abstraction has 74655 states and 277467 transitions. [2021-06-05 16:10:53,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:10:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 74655 states and 277467 transitions. [2021-06-05 16:10:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:10:53,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:53,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:54,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 16:10:54,016 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1789990140, now seen corresponding path program 157 times [2021-06-05 16:10:54,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:54,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109612923] [2021-06-05 16:10:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:54,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109612923] [2021-06-05 16:10:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109612923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438178780] [2021-06-05 16:10:54,035 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:54,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:10:54,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438178780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:54,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:54,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 16:10:54,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16211174] [2021-06-05 16:10:54,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:10:54,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:10:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:10:54,103 INFO L87 Difference]: Start difference. First operand 74655 states and 277467 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 16:10:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:10:55,544 INFO L93 Difference]: Finished difference Result 126973 states and 451879 transitions. [2021-06-05 16:10:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:10:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 16:10:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:10:55,876 INFO L225 Difference]: With dead ends: 126973 [2021-06-05 16:10:55,877 INFO L226 Difference]: Without dead ends: 126092 [2021-06-05 16:10:55,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=660, Invalid=2310, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:10:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126092 states. [2021-06-05 16:10:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126092 to 81796. [2021-06-05 16:10:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81796 states, 81795 states have (on average 3.726902622409683) internal successors, (304842), 81795 states have internal predecessors, (304842), 0 states have call successors, (0), 0 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 16:10:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81796 states to 81796 states and 304842 transitions. [2021-06-05 16:10:58,134 INFO L78 Accepts]: Start accepts. Automaton has 81796 states and 304842 transitions. Word has length 32 [2021-06-05 16:10:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:10:58,134 INFO L482 AbstractCegarLoop]: Abstraction has 81796 states and 304842 transitions. [2021-06-05 16:10:58,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 16:10:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81796 states and 304842 transitions. [2021-06-05 16:10:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:10:58,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:10:58,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:10:58,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:58,459 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:10:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:10:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2130967828, now seen corresponding path program 158 times [2021-06-05 16:10:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:10:58,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233210805] [2021-06-05 16:10:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:10:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:10:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:10:58,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:10:58,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233210805] [2021-06-05 16:10:58,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233210805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:58,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290111464] [2021-06-05 16:10:58,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:10:58,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:10:58,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:10:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:10:58,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:10:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 16:10:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290111464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:10:58,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:10:58,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 16:10:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086274892] [2021-06-05 16:10:58,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:10:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:10:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:10:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:10:58,551 INFO L87 Difference]: Start difference. First operand 81796 states and 304842 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 16:11:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:00,290 INFO L93 Difference]: Finished difference Result 103823 states and 367181 transitions. [2021-06-05 16:11:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 16:11:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 16:11:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:00,560 INFO L225 Difference]: With dead ends: 103823 [2021-06-05 16:11:00,560 INFO L226 Difference]: Without dead ends: 102463 [2021-06-05 16:11:00,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 529.0ms TimeCoverageRelationStatistics Valid=1264, Invalid=4898, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 16:11:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102463 states. [2021-06-05 16:11:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102463 to 81213. [2021-06-05 16:11:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81213 states, 81212 states have (on average 3.721420479732059) internal successors, (302224), 81212 states have internal predecessors, (302224), 0 states have call successors, (0), 0 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 16:11:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81213 states to 81213 states and 302224 transitions. [2021-06-05 16:11:02,691 INFO L78 Accepts]: Start accepts. Automaton has 81213 states and 302224 transitions. Word has length 32 [2021-06-05 16:11:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:02,691 INFO L482 AbstractCegarLoop]: Abstraction has 81213 states and 302224 transitions. [2021-06-05 16:11:02,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 16:11:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 81213 states and 302224 transitions. [2021-06-05 16:11:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:02,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:02,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:03,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:03,017 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash -81096240, now seen corresponding path program 159 times [2021-06-05 16:11:03,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:03,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130060590] [2021-06-05 16:11:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:03,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130060590] [2021-06-05 16:11:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130060590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070499814] [2021-06-05 16:11:03,039 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:11:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:03,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:11:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:03,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070499814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:03,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:03,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:11:03,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956620960] [2021-06-05 16:11:03,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:11:03,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:11:03,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:11:03,091 INFO L87 Difference]: Start difference. First operand 81213 states and 302224 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:03,863 INFO L93 Difference]: Finished difference Result 89727 states and 327410 transitions. [2021-06-05 16:11:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:11:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:11:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:04,131 INFO L225 Difference]: With dead ends: 89727 [2021-06-05 16:11:04,131 INFO L226 Difference]: Without dead ends: 89463 [2021-06-05 16:11:04,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:11:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89463 states. [2021-06-05 16:11:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89463 to 81093. [2021-06-05 16:11:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81093 states, 81092 states have (on average 3.7186035613870665) internal successors, (301549), 81092 states have internal predecessors, (301549), 0 states have call successors, (0), 0 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 16:11:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81093 states to 81093 states and 301549 transitions. [2021-06-05 16:11:05,812 INFO L78 Accepts]: Start accepts. Automaton has 81093 states and 301549 transitions. Word has length 32 [2021-06-05 16:11:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:05,812 INFO L482 AbstractCegarLoop]: Abstraction has 81093 states and 301549 transitions. [2021-06-05 16:11:05,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 81093 states and 301549 transitions. [2021-06-05 16:11:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:05,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:05,956 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:06,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:06,157 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1144501508, now seen corresponding path program 160 times [2021-06-05 16:11:06,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:06,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2748389] [2021-06-05 16:11:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:06,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2748389] [2021-06-05 16:11:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2748389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451154963] [2021-06-05 16:11:06,178 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:06,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:11:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:11:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:11:06,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451154963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:06,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:06,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 16:11:06,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063672872] [2021-06-05 16:11:06,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:11:06,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:06,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:11:06,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:11:06,234 INFO L87 Difference]: Start difference. First operand 81093 states and 301549 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:07,070 INFO L93 Difference]: Finished difference Result 95050 states and 344724 transitions. [2021-06-05 16:11:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:11:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:11:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:07,296 INFO L225 Difference]: With dead ends: 95050 [2021-06-05 16:11:07,296 INFO L226 Difference]: Without dead ends: 94988 [2021-06-05 16:11:07,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:11:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94988 states. [2021-06-05 16:11:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94988 to 80568. [2021-06-05 16:11:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80568 states, 80567 states have (on average 3.7057604230019736) internal successors, (298562), 80567 states have internal predecessors, (298562), 0 states have call successors, (0), 0 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 16:11:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80568 states to 80568 states and 298562 transitions. [2021-06-05 16:11:09,017 INFO L78 Accepts]: Start accepts. Automaton has 80568 states and 298562 transitions. Word has length 32 [2021-06-05 16:11:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:09,017 INFO L482 AbstractCegarLoop]: Abstraction has 80568 states and 298562 transitions. [2021-06-05 16:11:09,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 80568 states and 298562 transitions. [2021-06-05 16:11:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:09,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:09,145 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:09,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:09,345 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1462193428, now seen corresponding path program 161 times [2021-06-05 16:11:09,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:09,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432864876] [2021-06-05 16:11:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:09,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432864876] [2021-06-05 16:11:09,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432864876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387771899] [2021-06-05 16:11:09,370 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:09,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:11:09,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:11:09,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 16:11:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387771899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:09,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:09,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-06-05 16:11:09,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89528747] [2021-06-05 16:11:09,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:11:09,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:11:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:11:09,753 INFO L87 Difference]: Start difference. First operand 80568 states and 298562 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:10,602 INFO L93 Difference]: Finished difference Result 137312 states and 490128 transitions. [2021-06-05 16:11:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:11:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:11:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:10,957 INFO L225 Difference]: With dead ends: 137312 [2021-06-05 16:11:10,957 INFO L226 Difference]: Without dead ends: 137132 [2021-06-05 16:11:10,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:11:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137132 states. [2021-06-05 16:11:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137132 to 97897. [2021-06-05 16:11:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97897 states, 97896 states have (on average 3.721204135000409) internal successors, (364291), 97896 states have internal predecessors, (364291), 0 states have call successors, (0), 0 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 16:11:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97897 states to 97897 states and 364291 transitions. [2021-06-05 16:11:13,429 INFO L78 Accepts]: Start accepts. Automaton has 97897 states and 364291 transitions. Word has length 32 [2021-06-05 16:11:13,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:13,430 INFO L482 AbstractCegarLoop]: Abstraction has 97897 states and 364291 transitions. [2021-06-05 16:11:13,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 97897 states and 364291 transitions. [2021-06-05 16:11:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:13,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:13,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:14,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 16:11:14,193 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1396100842, now seen corresponding path program 162 times [2021-06-05 16:11:14,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:14,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761340586] [2021-06-05 16:11:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:14,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:14,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761340586] [2021-06-05 16:11:14,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761340586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:14,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676190299] [2021-06-05 16:11:14,210 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:14,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:11:14,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:11:14,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:11:14,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676190299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:14,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:14,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 16:11:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345799910] [2021-06-05 16:11:14,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:11:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:11:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:11:14,278 INFO L87 Difference]: Start difference. First operand 97897 states and 364291 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:11:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:15,448 INFO L93 Difference]: Finished difference Result 144885 states and 519929 transitions. [2021-06-05 16:11:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:11:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 16:11:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:16,251 INFO L225 Difference]: With dead ends: 144885 [2021-06-05 16:11:16,252 INFO L226 Difference]: Without dead ends: 144573 [2021-06-05 16:11:16,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=688, Invalid=2392, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:11:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144573 states. [2021-06-05 16:11:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144573 to 114379. [2021-06-05 16:11:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114379 states, 114378 states have (on average 3.7425029288849254) internal successors, (428060), 114378 states have internal predecessors, (428060), 0 states have call successors, (0), 0 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 16:11:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114379 states to 114379 states and 428060 transitions. [2021-06-05 16:11:18,990 INFO L78 Accepts]: Start accepts. Automaton has 114379 states and 428060 transitions. Word has length 32 [2021-06-05 16:11:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:18,991 INFO L482 AbstractCegarLoop]: Abstraction has 114379 states and 428060 transitions. [2021-06-05 16:11:18,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 16:11:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 114379 states and 428060 transitions. [2021-06-05 16:11:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:19,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:19,192 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:19,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 16:11:19,393 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2064838904, now seen corresponding path program 163 times [2021-06-05 16:11:19,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:19,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032857996] [2021-06-05 16:11:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:11:19,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:19,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032857996] [2021-06-05 16:11:19,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032857996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:19,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666946406] [2021-06-05 16:11:19,423 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:11:19,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:11:19,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666946406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:19,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:19,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 16:11:19,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275273873] [2021-06-05 16:11:19,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:11:19,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:19,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:11:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:11:19,498 INFO L87 Difference]: Start difference. First operand 114379 states and 428060 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 16:11:20,522 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 16:11:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:21,424 INFO L93 Difference]: Finished difference Result 145887 states and 519027 transitions. [2021-06-05 16:11:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 16:11:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 16:11:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:21,811 INFO L225 Difference]: With dead ends: 145887 [2021-06-05 16:11:21,811 INFO L226 Difference]: Without dead ends: 144953 [2021-06-05 16:11:21,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 969.7ms TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 16:11:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144953 states. [2021-06-05 16:11:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144953 to 114129. [2021-06-05 16:11:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114129 states, 114128 states have (on average 3.7392051030421984) internal successors, (426748), 114128 states have internal predecessors, (426748), 0 states have call successors, (0), 0 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 16:11:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114129 states to 114129 states and 426748 transitions. [2021-06-05 16:11:24,955 INFO L78 Accepts]: Start accepts. Automaton has 114129 states and 426748 transitions. Word has length 32 [2021-06-05 16:11:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:24,955 INFO L482 AbstractCegarLoop]: Abstraction has 114129 states and 426748 transitions. [2021-06-05 16:11:24,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 16:11:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 114129 states and 426748 transitions. [2021-06-05 16:11:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:11:25,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:25,151 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:25,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:25,352 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1651144382, now seen corresponding path program 164 times [2021-06-05 16:11:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:25,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821767180] [2021-06-05 16:11:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:11:25,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:25,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821767180] [2021-06-05 16:11:25,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821767180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:25,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396338833] [2021-06-05 16:11:25,385 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:25,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:11:25,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:11:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:11:25,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396338833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:25,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:11:25,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 16:11:25,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036477927] [2021-06-05 16:11:25,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:11:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:11:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:11:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:11:25,472 INFO L87 Difference]: Start difference. First operand 114129 states and 426748 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:11:26,917 INFO L93 Difference]: Finished difference Result 131239 states and 477233 transitions. [2021-06-05 16:11:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:11:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:11:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:11:27,254 INFO L225 Difference]: With dead ends: 131239 [2021-06-05 16:11:27,254 INFO L226 Difference]: Without dead ends: 130909 [2021-06-05 16:11:27,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:11:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130909 states. [2021-06-05 16:11:29,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130909 to 114599. [2021-06-05 16:11:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114599 states, 114598 states have (on average 3.7350041012932165) internal successors, (428024), 114598 states have internal predecessors, (428024), 0 states have call successors, (0), 0 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 16:11:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114599 states to 114599 states and 428024 transitions. [2021-06-05 16:11:29,792 INFO L78 Accepts]: Start accepts. Automaton has 114599 states and 428024 transitions. Word has length 32 [2021-06-05 16:11:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:11:29,792 INFO L482 AbstractCegarLoop]: Abstraction has 114599 states and 428024 transitions. [2021-06-05 16:11:29,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:11:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 114599 states and 428024 transitions. [2021-06-05 16:11:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 16:11:29,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:11:29,981 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:11:30,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 16:11:30,181 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:11:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:11:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1784629138, now seen corresponding path program 165 times [2021-06-05 16:11:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:11:30,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358178581] [2021-06-05 16:11:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:11:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:11:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:11:30,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:11:30,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358178581] [2021-06-05 16:11:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358178581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:11:30,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976744936] [2021-06-05 16:11:30,462 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:11:30,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:11:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:11:30,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 16:11:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:11:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-06-05 16:11:30,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:30,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:30,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:11:30,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:90 [2021-06-05 16:11:30,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 16:11:30,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:31,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:31,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:11:31,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:93 [2021-06-05 16:11:31,466 INFO L446 ElimStorePlain]: Different costs {0=[v_C_222], 5=[B], 9=[A]} [2021-06-05 16:11:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:11:31,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:11:31,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:31,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:31,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 71 [2021-06-05 16:11:31,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:11:31,673 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 52 [2021-06-05 16:11:31,674 INFO L628 ElimStorePlain]: treesize reduction 240, result has 35.7 percent of original size [2021-06-05 16:11:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:11:31,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:11:31,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:11:31,695 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 103 treesize of output 113