/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:29:07,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:29:07,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:29:07,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:29:07,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 22:29:07,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:29:07,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:29:07,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:29:07,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:29:07,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:29:07,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:29:07,739 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:29:07,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:29:07,739 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:29:07,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:29:07,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:29:07,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:29:07,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:29:07,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:29:07,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:29:07,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:29:07,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:29:07,742 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:29:07,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:29:07,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:29:08,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:29:08,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:29:08,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:29:08,040 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:29:08,041 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:29:08,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-03-10 22:29:08,042 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-03-10 22:29:08,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:29:08,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:29:08,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:08,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:29:08,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:29:08,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:08,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:29:08,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:29:08,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:29:08,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/1) ... [2021-03-10 22:29:08,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:29:08,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:29:08,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:29:08,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:29:08,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (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 [2021-03-10 22:29:08,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:29:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:29:08,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:29:08,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:29:08,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:29:08,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:29:08,181 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:29:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:29:08,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:29:08,181 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:29:08,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:29:08,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:29:08,181 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:29:08,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:29:08,375 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:29:08,385 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:08 BoogieIcfgContainer [2021-03-10 22:29:08,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:29:08,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:29:08,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:29:08,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:29:08,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:08" (1/2) ... [2021-03-10 22:29:08,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f3635ae and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:29:08, skipping insertion in model container [2021-03-10 22:29:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:08" (2/2) ... [2021-03-10 22:29:08,390 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-03-10 22:29:08,394 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:29:08,394 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:29:08,396 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:29:08,397 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:29:08,467 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 22:29:08,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 22:29:08,492 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:29:08,492 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:29:08,492 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:29:08,492 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:29:08,492 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:29:08,492 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:29:08,492 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:29:08,492 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:29:08,498 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-03-10 22:29:08,512 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:29:08,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:08,519 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:08,520 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-03-10 22:29:08,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:08,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013105775] [2021-03-10 22:29:08,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:08,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013105775] [2021-03-10 22:29:08,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:08,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 22:29:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773049905] [2021-03-10 22:29:08,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:08,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:08,638 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:08,676 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-03-10 22:29:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:08,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:29:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:08,684 INFO L225 Difference]: With dead ends: 84 [2021-03-10 22:29:08,684 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 22:29:08,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 22:29:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-03-10 22:29:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-03-10 22:29:08,716 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-03-10 22:29:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:08,716 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-03-10 22:29:08,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-03-10 22:29:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:29:08,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:08,718 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:08,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:29:08,718 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-03-10 22:29:08,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568079565] [2021-03-10 22:29:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:08,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568079565] [2021-03-10 22:29:08,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:08,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:29:08,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593301507] [2021-03-10 22:29:08,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:08,771 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:08,812 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-03-10 22:29:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:08,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:29:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:08,817 INFO L225 Difference]: With dead ends: 80 [2021-03-10 22:29:08,818 INFO L226 Difference]: Without dead ends: 66 [2021-03-10 22:29:08,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-10 22:29:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-03-10 22:29:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-03-10 22:29:08,835 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-03-10 22:29:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:08,835 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-03-10 22:29:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-03-10 22:29:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:29:08,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:08,836 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:08,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:29:08,836 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-03-10 22:29:08,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:08,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773063480] [2021-03-10 22:29:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:08,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773063480] [2021-03-10 22:29:08,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11018680] [2021-03-10 22:29:08,898 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 [2021-03-10 22:29:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:08,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:29:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:09,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:09,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 22:29:09,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029579629] [2021-03-10 22:29:09,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:09,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:09,057 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:09,120 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-03-10 22:29:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-03-10 22:29:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:09,122 INFO L225 Difference]: With dead ends: 90 [2021-03-10 22:29:09,122 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 22:29:09,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 22:29:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-03-10 22:29:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-03-10 22:29:09,126 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-03-10 22:29:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:09,127 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-03-10 22:29:09,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-03-10 22:29:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:29:09,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:09,127 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:09,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 22:29:09,328 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-03-10 22:29:09,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:09,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512773720] [2021-03-10 22:29:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512773720] [2021-03-10 22:29:09,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:09,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:29:09,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786562405] [2021-03-10 22:29:09,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:09,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:09,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:09,361 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:09,405 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-03-10 22:29:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:09,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:29:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:09,407 INFO L225 Difference]: With dead ends: 98 [2021-03-10 22:29:09,407 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 22:29:09,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 22:29:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-03-10 22:29:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-03-10 22:29:09,412 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-03-10 22:29:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:09,412 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-03-10 22:29:09,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-03-10 22:29:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:29:09,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:09,413 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:09,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:29:09,413 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-03-10 22:29:09,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:09,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972872266] [2021-03-10 22:29:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:09,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972872266] [2021-03-10 22:29:09,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369572433] [2021-03-10 22:29:09,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:09,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:09,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:29:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:09,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:09,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 22:29:09,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972192269] [2021-03-10 22:29:09,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:29:09,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:29:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:09,573 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-03-10 22:29:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:09,625 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-03-10 22:29:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:29:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-03-10 22:29:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:09,627 INFO L225 Difference]: With dead ends: 108 [2021-03-10 22:29:09,627 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 22:29:09,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:29:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 22:29:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-03-10 22:29:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-03-10 22:29:09,635 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-03-10 22:29:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:09,635 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-03-10 22:29:09,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-03-10 22:29:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-03-10 22:29:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:29:09,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:09,639 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:09,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:09,856 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-03-10 22:29:09,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:09,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992887706] [2021-03-10 22:29:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:09,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992887706] [2021-03-10 22:29:09,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723283130] [2021-03-10 22:29:09,898 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 [2021-03-10 22:29:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:29:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:10,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:10,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 22:29:10,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574086354] [2021-03-10 22:29:10,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:29:10,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:10,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:29:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:10,011 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-03-10 22:29:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:10,106 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-03-10 22:29:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:29:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-03-10 22:29:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:10,107 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:29:10,107 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 22:29:10,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:29:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 22:29:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-03-10 22:29:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-03-10 22:29:10,121 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-03-10 22:29:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:10,122 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-03-10 22:29:10,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-03-10 22:29:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-03-10 22:29:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:29:10,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:10,123 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:10,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:10,340 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:10,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-03-10 22:29:10,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:10,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741410167] [2021-03-10 22:29:10,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:10,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741410167] [2021-03-10 22:29:10,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45766631] [2021-03-10 22:29:10,392 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 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 [2021-03-10 22:29:10,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:29:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:10,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:29:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:10,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:10,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 22:29:10,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147205160] [2021-03-10 22:29:10,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:10,533 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-03-10 22:29:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:10,615 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-03-10 22:29:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:29:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20 [2021-03-10 22:29:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:10,616 INFO L225 Difference]: With dead ends: 142 [2021-03-10 22:29:10,616 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:29:10,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:29:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-03-10 22:29:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-03-10 22:29:10,620 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-03-10 22:29:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:10,620 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-03-10 22:29:10,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-03-10 22:29:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-03-10 22:29:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:29:10,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:10,621 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:10,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:10,841 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-03-10 22:29:10,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:10,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28438414] [2021-03-10 22:29:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:10,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28438414] [2021-03-10 22:29:10,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165270611] [2021-03-10 22:29:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:10,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:10,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:29:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:11,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:11,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 22:29:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653317326] [2021-03-10 22:29:11,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:11,043 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-03-10 22:29:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:11,141 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-03-10 22:29:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:29:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20 [2021-03-10 22:29:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:11,142 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:29:11,142 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:29:11,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:29:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:29:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-03-10 22:29:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-03-10 22:29:11,162 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-03-10 22:29:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:11,162 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-03-10 22:29:11,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-03-10 22:29:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-03-10 22:29:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:29:11,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:11,163 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:11,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 22:29:11,376 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-03-10 22:29:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:11,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996833142] [2021-03-10 22:29:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:11,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996833142] [2021-03-10 22:29:11,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693162059] [2021-03-10 22:29:11,443 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 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 [2021-03-10 22:29:11,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:11,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:29:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:11,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:11,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 22:29:11,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326670515] [2021-03-10 22:29:11,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:29:11,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:29:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:11,546 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-03-10 22:29:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:11,623 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-03-10 22:29:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:29:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 20 [2021-03-10 22:29:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:11,625 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:29:11,625 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:29:11,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:29:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-03-10 22:29:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-03-10 22:29:11,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-03-10 22:29:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:11,628 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-03-10 22:29:11,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-03-10 22:29:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-03-10 22:29:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:11,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:11,628 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:11,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:29:11,839 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:11,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:11,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-03-10 22:29:11,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:11,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821919889] [2021-03-10 22:29:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821919889] [2021-03-10 22:29:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872510121] [2021-03-10 22:29:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:11,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:29:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:12,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:12,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:29:12,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749852194] [2021-03-10 22:29:12,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:12,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:12,061 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:12,228 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-03-10 22:29:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:29:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-03-10 22:29:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:12,230 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:29:12,230 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:29:12,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:29:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-03-10 22:29:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-03-10 22:29:12,235 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-03-10 22:29:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:12,236 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-03-10 22:29:12,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-03-10 22:29:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:12,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:12,236 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:12,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:12,450 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-03-10 22:29:12,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:12,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571835904] [2021-03-10 22:29:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:12,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571835904] [2021-03-10 22:29:12,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664282627] [2021-03-10 22:29:12,508 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 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 [2021-03-10 22:29:12,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:29:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:29:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:12,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:12,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:29:12,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650217565] [2021-03-10 22:29:12,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:12,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:12,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:12,653 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:12,794 INFO L93 Difference]: Finished difference Result 180 states and 408 transitions. [2021-03-10 22:29:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:29:12,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-03-10 22:29:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:12,796 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:29:12,796 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:29:12,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:29:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:29:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2021-03-10 22:29:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.3248407643312103) internal successors, (365), 157 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2021-03-10 22:29:12,802 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 22 [2021-03-10 22:29:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:12,802 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2021-03-10 22:29:12,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2021-03-10 22:29:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:12,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:12,804 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:13,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:29:13,011 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash 149838780, now seen corresponding path program 4 times [2021-03-10 22:29:13,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:13,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195134861] [2021-03-10 22:29:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:13,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195134861] [2021-03-10 22:29:13,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997363209] [2021-03-10 22:29:13,062 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 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 [2021-03-10 22:29:13,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:29:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:29:13,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805636815] [2021-03-10 22:29:13,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:13,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:13,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:13,218 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:13,338 INFO L93 Difference]: Finished difference Result 220 states and 504 transitions. [2021-03-10 22:29:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:29:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-03-10 22:29:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:13,340 INFO L225 Difference]: With dead ends: 220 [2021-03-10 22:29:13,340 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 22:29:13,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:29:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 22:29:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 142. [2021-03-10 22:29:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-03-10 22:29:13,350 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-03-10 22:29:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:13,351 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-03-10 22:29:13,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-03-10 22:29:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:13,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:13,353 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:13,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:13,556 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2125206920, now seen corresponding path program 5 times [2021-03-10 22:29:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:13,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938039882] [2021-03-10 22:29:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:13,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938039882] [2021-03-10 22:29:13,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103726357] [2021-03-10 22:29:13,627 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 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 [2021-03-10 22:29:13,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:29:13,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:29:13,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:13,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:13,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:29:13,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762121405] [2021-03-10 22:29:13,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:13,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:13,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:13,777 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:13,909 INFO L93 Difference]: Finished difference Result 204 states and 468 transitions. [2021-03-10 22:29:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:29:13,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-03-10 22:29:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:13,910 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:29:13,911 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 22:29:13,911 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 22:29:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2021-03-10 22:29:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.315436241610738) internal successors, (345), 149 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 345 transitions. [2021-03-10 22:29:13,916 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 345 transitions. Word has length 22 [2021-03-10 22:29:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:13,917 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 345 transitions. [2021-03-10 22:29:13,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 345 transitions. [2021-03-10 22:29:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:13,918 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:13,918 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:14,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:29:14,132 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1937516620, now seen corresponding path program 6 times [2021-03-10 22:29:14,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:14,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686374444] [2021-03-10 22:29:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:14,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686374444] [2021-03-10 22:29:14,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030893958] [2021-03-10 22:29:14,181 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 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 [2021-03-10 22:29:14,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:29:14,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 22:29:14,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:14,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:14,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:29:14,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259560443] [2021-03-10 22:29:14,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:29:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:29:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:29:14,346 INFO L87 Difference]: Start difference. First operand 150 states and 345 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:14,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:14,500 INFO L93 Difference]: Finished difference Result 320 states and 704 transitions. [2021-03-10 22:29:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:29:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-03-10 22:29:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:14,507 INFO L225 Difference]: With dead ends: 320 [2021-03-10 22:29:14,507 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 22:29:14,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 22:29:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 174. [2021-03-10 22:29:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.3641618497109826) internal successors, (409), 173 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 409 transitions. [2021-03-10 22:29:14,511 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 409 transitions. Word has length 22 [2021-03-10 22:29:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:14,511 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 409 transitions. [2021-03-10 22:29:14,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-03-10 22:29:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 409 transitions. [2021-03-10 22:29:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:14,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:14,511 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:14,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 22:29:14,719 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 7 times [2021-03-10 22:29:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:14,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011262245] [2021-03-10 22:29:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011262245] [2021-03-10 22:29:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799019844] [2021-03-10 22:29:14,777 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 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 [2021-03-10 22:29:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:14,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:14,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525155240] [2021-03-10 22:29:14,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:14,967 INFO L87 Difference]: Start difference. First operand 174 states and 409 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:15,191 INFO L93 Difference]: Finished difference Result 252 states and 588 transitions. [2021-03-10 22:29:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:15,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:15,195 INFO L225 Difference]: With dead ends: 252 [2021-03-10 22:29:15,195 INFO L226 Difference]: Without dead ends: 230 [2021-03-10 22:29:15,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-03-10 22:29:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 190. [2021-03-10 22:29:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.375661375661376) internal successors, (449), 189 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 449 transitions. [2021-03-10 22:29:15,208 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 449 transitions. Word has length 24 [2021-03-10 22:29:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:15,208 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 449 transitions. [2021-03-10 22:29:15,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 449 transitions. [2021-03-10 22:29:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:15,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:15,209 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:15,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 22:29:15,425 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 8 times [2021-03-10 22:29:15,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:15,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669005639] [2021-03-10 22:29:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:15,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669005639] [2021-03-10 22:29:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363256888] [2021-03-10 22:29:15,517 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 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 [2021-03-10 22:29:15,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:15,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:15,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003169979] [2021-03-10 22:29:15,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:15,712 INFO L87 Difference]: Start difference. First operand 190 states and 449 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:15,926 INFO L93 Difference]: Finished difference Result 268 states and 628 transitions. [2021-03-10 22:29:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:29:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:15,928 INFO L225 Difference]: With dead ends: 268 [2021-03-10 22:29:15,928 INFO L226 Difference]: Without dead ends: 246 [2021-03-10 22:29:15,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:29:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-03-10 22:29:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 198. [2021-03-10 22:29:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3807106598984773) internal successors, (469), 197 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 469 transitions. [2021-03-10 22:29:15,933 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 469 transitions. Word has length 24 [2021-03-10 22:29:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:15,933 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 469 transitions. [2021-03-10 22:29:15,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 469 transitions. [2021-03-10 22:29:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:15,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:15,933 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:16,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 22:29:16,151 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:16,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 9 times [2021-03-10 22:29:16,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:16,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904441675] [2021-03-10 22:29:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:16,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904441675] [2021-03-10 22:29:16,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950417671] [2021-03-10 22:29:16,210 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 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 [2021-03-10 22:29:16,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:16,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:16,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911292228] [2021-03-10 22:29:16,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:16,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:16,369 INFO L87 Difference]: Start difference. First operand 198 states and 469 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:16,575 INFO L93 Difference]: Finished difference Result 324 states and 760 transitions. [2021-03-10 22:29:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:16,577 INFO L225 Difference]: With dead ends: 324 [2021-03-10 22:29:16,577 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 22:29:16,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 22:29:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 238. [2021-03-10 22:29:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-03-10 22:29:16,586 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-03-10 22:29:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:16,586 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-03-10 22:29:16,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-03-10 22:29:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:16,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:16,587 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:16,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:16,803 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:16,803 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 10 times [2021-03-10 22:29:16,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:16,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085938029] [2021-03-10 22:29:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:16,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085938029] [2021-03-10 22:29:16,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079719501] [2021-03-10 22:29:16,866 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 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 [2021-03-10 22:29:16,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:16,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:17,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:17,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328866839] [2021-03-10 22:29:17,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:17,043 INFO L87 Difference]: Start difference. First operand 238 states and 569 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:17,252 INFO L93 Difference]: Finished difference Result 276 states and 652 transitions. [2021-03-10 22:29:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:17,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:17,254 INFO L225 Difference]: With dead ends: 276 [2021-03-10 22:29:17,254 INFO L226 Difference]: Without dead ends: 262 [2021-03-10 22:29:17,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-03-10 22:29:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 238. [2021-03-10 22:29:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-03-10 22:29:17,261 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-03-10 22:29:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:17,261 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-03-10 22:29:17,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-03-10 22:29:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:17,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:17,262 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:17,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 22:29:17,476 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 11 times [2021-03-10 22:29:17,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:17,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516434149] [2021-03-10 22:29:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516434149] [2021-03-10 22:29:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447252540] [2021-03-10 22:29:17,535 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 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 [2021-03-10 22:29:17,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:29:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:17,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:17,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:17,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100045576] [2021-03-10 22:29:17,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:17,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:17,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:17,701 INFO L87 Difference]: Start difference. First operand 238 states and 569 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:17,863 INFO L93 Difference]: Finished difference Result 284 states and 672 transitions. [2021-03-10 22:29:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:17,864 INFO L225 Difference]: With dead ends: 284 [2021-03-10 22:29:17,864 INFO L226 Difference]: Without dead ends: 270 [2021-03-10 22:29:17,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-03-10 22:29:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 238. [2021-03-10 22:29:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-03-10 22:29:17,870 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-03-10 22:29:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:17,870 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-03-10 22:29:17,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-03-10 22:29:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:17,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:17,871 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:18,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:18,085 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:18,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1446592258, now seen corresponding path program 12 times [2021-03-10 22:29:18,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:18,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857068627] [2021-03-10 22:29:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857068627] [2021-03-10 22:29:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401075273] [2021-03-10 22:29:18,158 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 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 [2021-03-10 22:29:18,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:18,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:18,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:18,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231943934] [2021-03-10 22:29:18,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:18,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:18,320 INFO L87 Difference]: Start difference. First operand 238 states and 569 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:18,499 INFO L93 Difference]: Finished difference Result 340 states and 800 transitions. [2021-03-10 22:29:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:18,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:18,500 INFO L225 Difference]: With dead ends: 340 [2021-03-10 22:29:18,500 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 22:29:18,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 22:29:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-03-10 22:29:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-03-10 22:29:18,505 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-03-10 22:29:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:18,505 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-03-10 22:29:18,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-03-10 22:29:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:18,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:18,506 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:18,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:18,718 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1258901958, now seen corresponding path program 13 times [2021-03-10 22:29:18,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:18,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842158556] [2021-03-10 22:29:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:18,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842158556] [2021-03-10 22:29:18,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772058224] [2021-03-10 22:29:18,771 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 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 [2021-03-10 22:29:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:18,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:18,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:18,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207834889] [2021-03-10 22:29:18,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:18,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:18,958 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:19,139 INFO L93 Difference]: Finished difference Result 300 states and 712 transitions. [2021-03-10 22:29:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:29:19,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:19,141 INFO L225 Difference]: With dead ends: 300 [2021-03-10 22:29:19,141 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 22:29:19,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:29:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 22:29:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 246. [2021-03-10 22:29:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-03-10 22:29:19,147 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-03-10 22:29:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:19,147 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-03-10 22:29:19,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-03-10 22:29:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:19,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:19,148 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:19,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:19,352 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:19,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1570988542, now seen corresponding path program 14 times [2021-03-10 22:29:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:19,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735102948] [2021-03-10 22:29:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:19,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735102948] [2021-03-10 22:29:19,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552505628] [2021-03-10 22:29:19,402 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 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 [2021-03-10 22:29:19,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:19,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:19,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:19,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:19,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549387814] [2021-03-10 22:29:19,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:19,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:19,567 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:19,778 INFO L93 Difference]: Finished difference Result 332 states and 784 transitions. [2021-03-10 22:29:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:29:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:19,779 INFO L225 Difference]: With dead ends: 332 [2021-03-10 22:29:19,779 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 22:29:19,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:29:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 22:29:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-03-10 22:29:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:19,784 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:19,784 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:19,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:19,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:19,785 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:19,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 22:29:19,996 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1464840390, now seen corresponding path program 15 times [2021-03-10 22:29:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:19,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93884420] [2021-03-10 22:29:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93884420] [2021-03-10 22:29:20,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404002576] [2021-03-10 22:29:20,053 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 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 [2021-03-10 22:29:20,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:20,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:20,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:20,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301761242] [2021-03-10 22:29:20,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:20,191 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:20,423 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-03-10 22:29:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:20,424 INFO L225 Difference]: With dead ends: 332 [2021-03-10 22:29:20,424 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 22:29:20,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:29:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 22:29:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 262. [2021-03-10 22:29:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:20,430 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:20,430 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:20,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:20,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:20,430 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:20,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 22:29:20,643 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 16 times [2021-03-10 22:29:20,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:20,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758886409] [2021-03-10 22:29:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758886409] [2021-03-10 22:29:20,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116461166] [2021-03-10 22:29:20,689 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:20,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:20,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:20,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085825311] [2021-03-10 22:29:20,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:20,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:20,840 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:20,968 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-03-10 22:29:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:29:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:20,969 INFO L225 Difference]: With dead ends: 300 [2021-03-10 22:29:20,969 INFO L226 Difference]: Without dead ends: 286 [2021-03-10 22:29:20,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-03-10 22:29:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-03-10 22:29:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:20,974 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:20,974 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:20,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:20,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:20,975 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:21,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 22:29:21,188 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 17 times [2021-03-10 22:29:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:21,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200766713] [2021-03-10 22:29:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:21,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200766713] [2021-03-10 22:29:21,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612006748] [2021-03-10 22:29:21,256 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 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 [2021-03-10 22:29:21,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:29:21,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:21,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:21,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:21,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099498344] [2021-03-10 22:29:21,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:21,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:21,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:21,430 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:21,608 INFO L93 Difference]: Finished difference Result 316 states and 748 transitions. [2021-03-10 22:29:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:29:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:21,610 INFO L225 Difference]: With dead ends: 316 [2021-03-10 22:29:21,610 INFO L226 Difference]: Without dead ends: 302 [2021-03-10 22:29:21,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:29:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-03-10 22:29:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-03-10 22:29:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:21,626 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:21,626 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:21,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:21,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:21,629 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:21,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:21,843 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 18 times [2021-03-10 22:29:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:21,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960004267] [2021-03-10 22:29:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960004267] [2021-03-10 22:29:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303577657] [2021-03-10 22:29:21,898 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 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 [2021-03-10 22:29:21,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:21,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:21,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:22,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:22,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:22,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877390492] [2021-03-10 22:29:22,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:22,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:22,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:22,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:22,050 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:22,344 INFO L93 Difference]: Finished difference Result 380 states and 900 transitions. [2021-03-10 22:29:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:22,346 INFO L225 Difference]: With dead ends: 380 [2021-03-10 22:29:22,346 INFO L226 Difference]: Without dead ends: 350 [2021-03-10 22:29:22,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:29:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-03-10 22:29:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-03-10 22:29:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-03-10 22:29:22,352 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-03-10 22:29:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:22,352 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-03-10 22:29:22,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-03-10 22:29:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:22,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:22,353 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:22,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:22,561 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash -189697990, now seen corresponding path program 19 times [2021-03-10 22:29:22,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:22,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273932028] [2021-03-10 22:29:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273932028] [2021-03-10 22:29:22,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597368690] [2021-03-10 22:29:22,616 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:22,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:22,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259030251] [2021-03-10 22:29:22,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:22,757 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:22,949 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-03-10 22:29:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:29:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:22,950 INFO L225 Difference]: With dead ends: 332 [2021-03-10 22:29:22,950 INFO L226 Difference]: Without dead ends: 318 [2021-03-10 22:29:22,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:29:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-03-10 22:29:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-03-10 22:29:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-03-10 22:29:22,955 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-03-10 22:29:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:22,955 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-03-10 22:29:22,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-03-10 22:29:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:22,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:22,956 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:23,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:23,171 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 20 times [2021-03-10 22:29:23,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:23,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397486441] [2021-03-10 22:29:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:23,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397486441] [2021-03-10 22:29:23,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111487737] [2021-03-10 22:29:23,221 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 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 [2021-03-10 22:29:23,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:23,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:23,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:23,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960951915] [2021-03-10 22:29:23,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:23,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:23,356 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:23,528 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-03-10 22:29:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:23,529 INFO L225 Difference]: With dead ends: 308 [2021-03-10 22:29:23,529 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 22:29:23,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 22:29:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-03-10 22:29:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:23,533 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:23,534 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:23,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:23,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:23,534 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:23,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 22:29:23,750 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:23,750 INFO L82 PathProgramCache]: Analyzing trace with hash -528035526, now seen corresponding path program 21 times [2021-03-10 22:29:23,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:23,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728715001] [2021-03-10 22:29:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:23,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728715001] [2021-03-10 22:29:23,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27001093] [2021-03-10 22:29:23,802 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 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 [2021-03-10 22:29:23,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:29:23,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:23,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:23,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:23,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:23,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:23,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435671838] [2021-03-10 22:29:23,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:23,941 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:24,187 INFO L93 Difference]: Finished difference Result 340 states and 808 transitions. [2021-03-10 22:29:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:24,189 INFO L225 Difference]: With dead ends: 340 [2021-03-10 22:29:24,189 INFO L226 Difference]: Without dead ends: 326 [2021-03-10 22:29:24,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:29:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-03-10 22:29:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 270. [2021-03-10 22:29:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-03-10 22:29:24,194 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-03-10 22:29:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:24,194 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-03-10 22:29:24,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-03-10 22:29:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:24,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:24,194 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:24,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:24,407 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:24,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 22 times [2021-03-10 22:29:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911846768] [2021-03-10 22:29:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911846768] [2021-03-10 22:29:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712425033] [2021-03-10 22:29:24,461 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 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 [2021-03-10 22:29:24,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 22:29:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:24,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:24,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458241899] [2021-03-10 22:29:24,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:24,617 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:24,814 INFO L93 Difference]: Finished difference Result 332 states and 784 transitions. [2021-03-10 22:29:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:24,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:24,815 INFO L225 Difference]: With dead ends: 332 [2021-03-10 22:29:24,815 INFO L226 Difference]: Without dead ends: 310 [2021-03-10 22:29:24,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-03-10 22:29:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 270. [2021-03-10 22:29:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-03-10 22:29:24,820 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-03-10 22:29:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:24,820 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-03-10 22:29:24,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-03-10 22:29:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 22:29:24,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:24,843 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:25,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:25,047 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 23 times [2021-03-10 22:29:25,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:25,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229620703] [2021-03-10 22:29:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229620703] [2021-03-10 22:29:25,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643631673] [2021-03-10 22:29:25,096 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 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 [2021-03-10 22:29:25,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:29:25,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:25,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:29:25,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083612572] [2021-03-10 22:29:25,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:29:25,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:29:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:29:25,235 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:25,338 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-03-10 22:29:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:29:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 22:29:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:25,340 INFO L225 Difference]: With dead ends: 308 [2021-03-10 22:29:25,340 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 22:29:25,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:29:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 22:29:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-03-10 22:29:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-03-10 22:29:25,344 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-03-10 22:29:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:25,345 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-03-10 22:29:25,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-03-10 22:29:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:25,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:25,346 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:25,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:25,562 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 24 times [2021-03-10 22:29:25,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:25,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392811559] [2021-03-10 22:29:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392811559] [2021-03-10 22:29:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053747833] [2021-03-10 22:29:25,622 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 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 [2021-03-10 22:29:25,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:29:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:25,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:25,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540158947] [2021-03-10 22:29:25,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:25,820 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:26,069 INFO L93 Difference]: Finished difference Result 396 states and 940 transitions. [2021-03-10 22:29:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:26,070 INFO L225 Difference]: With dead ends: 396 [2021-03-10 22:29:26,070 INFO L226 Difference]: Without dead ends: 366 [2021-03-10 22:29:26,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-03-10 22:29:26,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-03-10 22:29:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4061433447098977) internal successors, (705), 293 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 705 transitions. [2021-03-10 22:29:26,075 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 705 transitions. Word has length 26 [2021-03-10 22:29:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:26,076 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 705 transitions. [2021-03-10 22:29:26,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 705 transitions. [2021-03-10 22:29:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:26,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:26,076 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:26,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 22:29:26,283 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 25 times [2021-03-10 22:29:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:26,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485645183] [2021-03-10 22:29:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485645183] [2021-03-10 22:29:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089393165] [2021-03-10 22:29:26,348 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 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 [2021-03-10 22:29:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:26,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:26,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:26,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:26,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:26,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349620932] [2021-03-10 22:29:26,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:26,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:26,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:26,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:26,550 INFO L87 Difference]: Start difference. First operand 294 states and 705 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:26,859 INFO L93 Difference]: Finished difference Result 460 states and 1096 transitions. [2021-03-10 22:29:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:26,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:26,861 INFO L225 Difference]: With dead ends: 460 [2021-03-10 22:29:26,861 INFO L226 Difference]: Without dead ends: 422 [2021-03-10 22:29:26,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:29:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-03-10 22:29:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 310. [2021-03-10 22:29:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-03-10 22:29:26,866 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-03-10 22:29:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:26,866 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-03-10 22:29:26,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-03-10 22:29:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:26,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:26,867 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:27,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:27,083 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 26 times [2021-03-10 22:29:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:27,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93860522] [2021-03-10 22:29:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93860522] [2021-03-10 22:29:27,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748160568] [2021-03-10 22:29:27,153 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 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 [2021-03-10 22:29:27,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:27,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:27,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:27,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:27,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139656951] [2021-03-10 22:29:27,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:27,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:27,376 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:27,708 INFO L93 Difference]: Finished difference Result 468 states and 1120 transitions. [2021-03-10 22:29:27,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:29:27,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:27,710 INFO L225 Difference]: With dead ends: 468 [2021-03-10 22:29:27,710 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:29:27,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:29:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:29:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 350. [2021-03-10 22:29:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.4212034383954153) internal successors, (845), 349 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 845 transitions. [2021-03-10 22:29:27,715 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 845 transitions. Word has length 26 [2021-03-10 22:29:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:27,715 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 845 transitions. [2021-03-10 22:29:27,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 845 transitions. [2021-03-10 22:29:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:27,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:27,716 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:27,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:27,931 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1026684036, now seen corresponding path program 27 times [2021-03-10 22:29:27,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:27,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40852607] [2021-03-10 22:29:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:27,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40852607] [2021-03-10 22:29:27,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590893171] [2021-03-10 22:29:27,987 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:28,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:28,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:28,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:28,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:28,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230117760] [2021-03-10 22:29:28,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:28,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:28,182 INFO L87 Difference]: Start difference. First operand 350 states and 845 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:28,440 INFO L93 Difference]: Finished difference Result 452 states and 1084 transitions. [2021-03-10 22:29:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:28,442 INFO L225 Difference]: With dead ends: 452 [2021-03-10 22:29:28,442 INFO L226 Difference]: Without dead ends: 430 [2021-03-10 22:29:28,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-03-10 22:29:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-03-10 22:29:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.4212034383954153) internal successors, (845), 349 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 845 transitions. [2021-03-10 22:29:28,447 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 845 transitions. Word has length 26 [2021-03-10 22:29:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:28,447 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 845 transitions. [2021-03-10 22:29:28,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 845 transitions. [2021-03-10 22:29:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:28,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:28,448 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:28,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-03-10 22:29:28,662 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 28 times [2021-03-10 22:29:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267301087] [2021-03-10 22:29:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267301087] [2021-03-10 22:29:28,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755728111] [2021-03-10 22:29:28,727 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 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 [2021-03-10 22:29:28,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:28,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:28,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:28,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:28,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:28,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653581549] [2021-03-10 22:29:28,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:28,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:28,916 INFO L87 Difference]: Start difference. First operand 350 states and 845 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:29,174 INFO L93 Difference]: Finished difference Result 500 states and 1196 transitions. [2021-03-10 22:29:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:29,176 INFO L225 Difference]: With dead ends: 500 [2021-03-10 22:29:29,176 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 22:29:29,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 22:29:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 366. [2021-03-10 22:29:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.4246575342465753) internal successors, (885), 365 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 885 transitions. [2021-03-10 22:29:29,182 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 885 transitions. Word has length 26 [2021-03-10 22:29:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:29,182 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 885 transitions. [2021-03-10 22:29:29,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 885 transitions. [2021-03-10 22:29:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:29,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:29,183 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:29,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:29,399 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 29 times [2021-03-10 22:29:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:29,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938509897] [2021-03-10 22:29:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:29,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938509897] [2021-03-10 22:29:29,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265102563] [2021-03-10 22:29:29,488 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:29,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:29:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:29,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:29,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694433437] [2021-03-10 22:29:29,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:29,667 INFO L87 Difference]: Start difference. First operand 366 states and 885 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:30,016 INFO L93 Difference]: Finished difference Result 556 states and 1336 transitions. [2021-03-10 22:29:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:30,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:30,018 INFO L225 Difference]: With dead ends: 556 [2021-03-10 22:29:30,018 INFO L226 Difference]: Without dead ends: 518 [2021-03-10 22:29:30,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-03-10 22:29:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 406. [2021-03-10 22:29:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-03-10 22:29:30,025 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-03-10 22:29:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:30,025 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-03-10 22:29:30,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-03-10 22:29:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:30,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:30,025 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:30,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-03-10 22:29:30,239 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:30,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 30 times [2021-03-10 22:29:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:30,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050072551] [2021-03-10 22:29:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050072551] [2021-03-10 22:29:30,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138152993] [2021-03-10 22:29:30,336 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 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 [2021-03-10 22:29:30,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:30,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:30,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:30,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:30,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937889901] [2021-03-10 22:29:30,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:30,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:30,557 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:30,789 INFO L93 Difference]: Finished difference Result 444 states and 1068 transitions. [2021-03-10 22:29:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:29:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:30,790 INFO L225 Difference]: With dead ends: 444 [2021-03-10 22:29:30,790 INFO L226 Difference]: Without dead ends: 430 [2021-03-10 22:29:30,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:29:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-03-10 22:29:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 406. [2021-03-10 22:29:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-03-10 22:29:30,796 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-03-10 22:29:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:30,796 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-03-10 22:29:30,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-03-10 22:29:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:30,797 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:30,797 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:31,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:31,013 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1446620796, now seen corresponding path program 31 times [2021-03-10 22:29:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:31,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745733593] [2021-03-10 22:29:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745733593] [2021-03-10 22:29:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439487589] [2021-03-10 22:29:31,067 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 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 [2021-03-10 22:29:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:31,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:31,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:31,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910129570] [2021-03-10 22:29:31,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:31,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:31,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:31,246 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:31,474 INFO L93 Difference]: Finished difference Result 516 states and 1240 transitions. [2021-03-10 22:29:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:31,476 INFO L225 Difference]: With dead ends: 516 [2021-03-10 22:29:31,476 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 22:29:31,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 22:29:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 414. [2021-03-10 22:29:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.433414043583535) internal successors, (1005), 413 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1005 transitions. [2021-03-10 22:29:31,482 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1005 transitions. Word has length 26 [2021-03-10 22:29:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:31,482 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1005 transitions. [2021-03-10 22:29:31,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1005 transitions. [2021-03-10 22:29:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:31,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:31,483 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:31,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:31,699 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2050252736, now seen corresponding path program 32 times [2021-03-10 22:29:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:31,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755661970] [2021-03-10 22:29:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:31,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755661970] [2021-03-10 22:29:31,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513991944] [2021-03-10 22:29:31,745 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:31,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:31,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:31,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:31,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220082516] [2021-03-10 22:29:31,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:31,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:31,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:31,919 INFO L87 Difference]: Start difference. First operand 414 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:32,175 INFO L93 Difference]: Finished difference Result 508 states and 1220 transitions. [2021-03-10 22:29:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:32,177 INFO L225 Difference]: With dead ends: 508 [2021-03-10 22:29:32,177 INFO L226 Difference]: Without dead ends: 478 [2021-03-10 22:29:32,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-03-10 22:29:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-03-10 22:29:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-03-10 22:29:32,182 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-03-10 22:29:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:32,183 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-03-10 22:29:32,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-03-10 22:29:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:32,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:32,183 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:32,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-03-10 22:29:32,400 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 33 times [2021-03-10 22:29:32,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:32,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962174336] [2021-03-10 22:29:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:32,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962174336] [2021-03-10 22:29:32,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914503740] [2021-03-10 22:29:32,452 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 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 [2021-03-10 22:29:32,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:29:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:32,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:32,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:32,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112960428] [2021-03-10 22:29:32,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:32,658 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:32,900 INFO L93 Difference]: Finished difference Result 548 states and 1316 transitions. [2021-03-10 22:29:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:32,901 INFO L225 Difference]: With dead ends: 548 [2021-03-10 22:29:32,901 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 22:29:32,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 22:29:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 390. [2021-03-10 22:29:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.429305912596401) internal successors, (945), 389 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 945 transitions. [2021-03-10 22:29:32,907 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 945 transitions. Word has length 26 [2021-03-10 22:29:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:32,907 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 945 transitions. [2021-03-10 22:29:32,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 945 transitions. [2021-03-10 22:29:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:32,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:32,908 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:33,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:33,123 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 34 times [2021-03-10 22:29:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:33,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583660396] [2021-03-10 22:29:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:33,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583660396] [2021-03-10 22:29:33,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505985573] [2021-03-10 22:29:33,177 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:33,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:33,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:33,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990508544] [2021-03-10 22:29:33,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:33,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:33,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:33,365 INFO L87 Difference]: Start difference. First operand 390 states and 945 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:33,694 INFO L93 Difference]: Finished difference Result 580 states and 1396 transitions. [2021-03-10 22:29:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:33,696 INFO L225 Difference]: With dead ends: 580 [2021-03-10 22:29:33,696 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 22:29:33,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:29:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 22:29:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 406. [2021-03-10 22:29:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-03-10 22:29:33,702 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-03-10 22:29:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:33,702 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-03-10 22:29:33,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-03-10 22:29:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:33,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:33,703 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:33,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:33,903 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:33,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 35 times [2021-03-10 22:29:33,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:33,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813326990] [2021-03-10 22:29:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813326990] [2021-03-10 22:29:33,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343512575] [2021-03-10 22:29:33,967 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:34,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:29:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:34,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:34,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060109687] [2021-03-10 22:29:34,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:34,181 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:34,495 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-03-10 22:29:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:34,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:34,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:34,498 INFO L225 Difference]: With dead ends: 588 [2021-03-10 22:29:34,498 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 22:29:34,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:29:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 22:29:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 398. [2021-03-10 22:29:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4307304785894206) internal successors, (965), 397 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 965 transitions. [2021-03-10 22:29:34,504 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 965 transitions. Word has length 26 [2021-03-10 22:29:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:34,504 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 965 transitions. [2021-03-10 22:29:34,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 965 transitions. [2021-03-10 22:29:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:34,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:34,504 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:34,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:34,715 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1032101304, now seen corresponding path program 36 times [2021-03-10 22:29:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687016430] [2021-03-10 22:29:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687016430] [2021-03-10 22:29:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048079111] [2021-03-10 22:29:34,774 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 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 [2021-03-10 22:29:34,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:29:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:34,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:34,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:34,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666346984] [2021-03-10 22:29:34,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:34,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:34,974 INFO L87 Difference]: Start difference. First operand 398 states and 965 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:35,203 INFO L93 Difference]: Finished difference Result 452 states and 1088 transitions. [2021-03-10 22:29:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:29:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:35,205 INFO L225 Difference]: With dead ends: 452 [2021-03-10 22:29:35,205 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:29:35,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:29:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:29:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2021-03-10 22:29:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.433414043583535) internal successors, (1005), 413 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1005 transitions. [2021-03-10 22:29:35,211 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1005 transitions. Word has length 26 [2021-03-10 22:29:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:35,211 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1005 transitions. [2021-03-10 22:29:35,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1005 transitions. [2021-03-10 22:29:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:35,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:35,212 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:35,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-03-10 22:29:35,427 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1344405960, now seen corresponding path program 37 times [2021-03-10 22:29:35,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:35,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612907610] [2021-03-10 22:29:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612907610] [2021-03-10 22:29:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752317584] [2021-03-10 22:29:35,480 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:35,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:35,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:35,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931569232] [2021-03-10 22:29:35,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:35,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:35,701 INFO L87 Difference]: Start difference. First operand 414 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:35,926 INFO L93 Difference]: Finished difference Result 532 states and 1280 transitions. [2021-03-10 22:29:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:35,928 INFO L225 Difference]: With dead ends: 532 [2021-03-10 22:29:35,928 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 22:29:35,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:29:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 22:29:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 422. [2021-03-10 22:29:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4346793349168645) internal successors, (1025), 421 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1025 transitions. [2021-03-10 22:29:35,935 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1025 transitions. Word has length 26 [2021-03-10 22:29:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:35,935 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 1025 transitions. [2021-03-10 22:29:35,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1025 transitions. [2021-03-10 22:29:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:35,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:35,937 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:36,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:36,143 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 675515636, now seen corresponding path program 38 times [2021-03-10 22:29:36,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:36,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610614346] [2021-03-10 22:29:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610614346] [2021-03-10 22:29:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140691619] [2021-03-10 22:29:36,205 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 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 [2021-03-10 22:29:36,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:36,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:36,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:36,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:29:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128455382] [2021-03-10 22:29:36,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:29:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:29:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:29:36,377 INFO L87 Difference]: Start difference. First operand 422 states and 1025 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:36,653 INFO L93 Difference]: Finished difference Result 580 states and 1396 transitions. [2021-03-10 22:29:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:36,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-03-10 22:29:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:36,656 INFO L225 Difference]: With dead ends: 580 [2021-03-10 22:29:36,656 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 22:29:36,656 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:29:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 22:29:36,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 430. [2021-03-10 22:29:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.4358974358974357) internal successors, (1045), 429 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1045 transitions. [2021-03-10 22:29:36,662 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1045 transitions. Word has length 26 [2021-03-10 22:29:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:36,662 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1045 transitions. [2021-03-10 22:29:36,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-03-10 22:29:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1045 transitions. [2021-03-10 22:29:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:36,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:36,663 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:36,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:36,879 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-03-10 22:29:36,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:36,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762083898] [2021-03-10 22:29:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:36,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762083898] [2021-03-10 22:29:36,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897507290] [2021-03-10 22:29:36,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:36,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:29:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:29:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:37,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:37,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:37,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205137653] [2021-03-10 22:29:37,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:37,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:37,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:37,210 INFO L87 Difference]: Start difference. First operand 430 states and 1045 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:37,518 INFO L93 Difference]: Finished difference Result 498 states and 1192 transitions. [2021-03-10 22:29:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:29:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:37,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:37,520 INFO L225 Difference]: With dead ends: 498 [2021-03-10 22:29:37,520 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 22:29:37,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:29:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 22:29:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 444. [2021-03-10 22:29:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.4311512415349887) internal successors, (1077), 443 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1077 transitions. [2021-03-10 22:29:37,526 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1077 transitions. Word has length 28 [2021-03-10 22:29:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:37,526 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1077 transitions. [2021-03-10 22:29:37,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1077 transitions. [2021-03-10 22:29:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:37,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:37,526 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:37,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-03-10 22:29:37,742 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 39 times [2021-03-10 22:29:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:37,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853686997] [2021-03-10 22:29:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:37,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853686997] [2021-03-10 22:29:37,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193588231] [2021-03-10 22:29:37,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:29:37,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:29:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:38,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:38,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954795832] [2021-03-10 22:29:38,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:38,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:38,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:38,125 INFO L87 Difference]: Start difference. First operand 444 states and 1077 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:38,522 INFO L93 Difference]: Finished difference Result 578 states and 1396 transitions. [2021-03-10 22:29:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:38,524 INFO L225 Difference]: With dead ends: 578 [2021-03-10 22:29:38,524 INFO L226 Difference]: Without dead ends: 556 [2021-03-10 22:29:38,525 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:29:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-10 22:29:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 444. [2021-03-10 22:29:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.4311512415349887) internal successors, (1077), 443 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1077 transitions. [2021-03-10 22:29:38,530 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1077 transitions. Word has length 28 [2021-03-10 22:29:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:38,530 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1077 transitions. [2021-03-10 22:29:38,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:38,530 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1077 transitions. [2021-03-10 22:29:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:38,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:38,531 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:38,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-10 22:29:38,746 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 40 times [2021-03-10 22:29:38,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:38,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893411009] [2021-03-10 22:29:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893411009] [2021-03-10 22:29:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343216252] [2021-03-10 22:29:38,842 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 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 [2021-03-10 22:29:38,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:38,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:39,097 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 22:29:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:39,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:39,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132849014] [2021-03-10 22:29:39,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:39,238 INFO L87 Difference]: Start difference. First operand 444 states and 1077 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:39,553 INFO L93 Difference]: Finished difference Result 602 states and 1448 transitions. [2021-03-10 22:29:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:39,556 INFO L225 Difference]: With dead ends: 602 [2021-03-10 22:29:39,556 INFO L226 Difference]: Without dead ends: 564 [2021-03-10 22:29:39,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 554.3ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-03-10 22:29:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 452. [2021-03-10 22:29:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.432372505543237) internal successors, (1097), 451 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1097 transitions. [2021-03-10 22:29:39,561 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1097 transitions. Word has length 28 [2021-03-10 22:29:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:39,562 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 1097 transitions. [2021-03-10 22:29:39,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1097 transitions. [2021-03-10 22:29:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:39,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:39,562 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:39,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-03-10 22:29:39,772 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 41 times [2021-03-10 22:29:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:39,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818527791] [2021-03-10 22:29:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818527791] [2021-03-10 22:29:39,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675490318] [2021-03-10 22:29:39,854 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 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 [2021-03-10 22:29:39,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:29:39,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:39,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:39,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:40,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:40,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290660135] [2021-03-10 22:29:40,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:40,114 INFO L87 Difference]: Start difference. First operand 452 states and 1097 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:40,420 INFO L93 Difference]: Finished difference Result 642 states and 1552 transitions. [2021-03-10 22:29:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:40,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:40,422 INFO L225 Difference]: With dead ends: 642 [2021-03-10 22:29:40,422 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 22:29:40,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 22:29:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 492. [2021-03-10 22:29:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.4378818737270875) internal successors, (1197), 491 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1197 transitions. [2021-03-10 22:29:40,432 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1197 transitions. Word has length 28 [2021-03-10 22:29:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:40,432 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1197 transitions. [2021-03-10 22:29:40,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1197 transitions. [2021-03-10 22:29:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:40,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:40,433 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:40,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:40,646 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash -994979326, now seen corresponding path program 42 times [2021-03-10 22:29:40,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:40,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868176672] [2021-03-10 22:29:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:40,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868176672] [2021-03-10 22:29:40,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532322895] [2021-03-10 22:29:40,719 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:40,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:40,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:40,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:40,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368473027] [2021-03-10 22:29:40,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:40,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:40,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:40,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:40,957 INFO L87 Difference]: Start difference. First operand 492 states and 1197 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:41,286 INFO L93 Difference]: Finished difference Result 666 states and 1612 transitions. [2021-03-10 22:29:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:29:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:41,289 INFO L225 Difference]: With dead ends: 666 [2021-03-10 22:29:41,289 INFO L226 Difference]: Without dead ends: 636 [2021-03-10 22:29:41,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:29:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-03-10 22:29:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 516. [2021-03-10 22:29:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.440776699029126) internal successors, (1257), 515 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1257 transitions. [2021-03-10 22:29:41,295 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1257 transitions. Word has length 28 [2021-03-10 22:29:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:41,295 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1257 transitions. [2021-03-10 22:29:41,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1257 transitions. [2021-03-10 22:29:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:41,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:41,296 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:41,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:41,497 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 43 times [2021-03-10 22:29:41,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:41,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982354271] [2021-03-10 22:29:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:41,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982354271] [2021-03-10 22:29:41,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836733500] [2021-03-10 22:29:41,598 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:41,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:41,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:41,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:41,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545923156] [2021-03-10 22:29:41,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:41,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:41,844 INFO L87 Difference]: Start difference. First operand 516 states and 1257 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:42,254 INFO L93 Difference]: Finished difference Result 642 states and 1552 transitions. [2021-03-10 22:29:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:42,256 INFO L225 Difference]: With dead ends: 642 [2021-03-10 22:29:42,256 INFO L226 Difference]: Without dead ends: 612 [2021-03-10 22:29:42,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:29:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-03-10 22:29:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-03-10 22:29:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.440776699029126) internal successors, (1257), 515 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1257 transitions. [2021-03-10 22:29:42,262 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1257 transitions. Word has length 28 [2021-03-10 22:29:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:42,262 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1257 transitions. [2021-03-10 22:29:42,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1257 transitions. [2021-03-10 22:29:42,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:42,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:42,263 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:42,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:42,467 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 44 times [2021-03-10 22:29:42,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:42,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697824910] [2021-03-10 22:29:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:42,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697824910] [2021-03-10 22:29:42,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976094385] [2021-03-10 22:29:42,550 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 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 [2021-03-10 22:29:42,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:42,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:42,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:42,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323109747] [2021-03-10 22:29:42,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:42,813 INFO L87 Difference]: Start difference. First operand 516 states and 1257 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:43,184 INFO L93 Difference]: Finished difference Result 674 states and 1632 transitions. [2021-03-10 22:29:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:43,187 INFO L225 Difference]: With dead ends: 674 [2021-03-10 22:29:43,187 INFO L226 Difference]: Without dead ends: 644 [2021-03-10 22:29:43,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 487.2ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-03-10 22:29:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 532. [2021-03-10 22:29:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.4425612052730696) internal successors, (1297), 531 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1297 transitions. [2021-03-10 22:29:43,193 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1297 transitions. Word has length 28 [2021-03-10 22:29:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:43,194 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1297 transitions. [2021-03-10 22:29:43,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1297 transitions. [2021-03-10 22:29:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:43,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:43,195 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:43,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:43,411 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -837205826, now seen corresponding path program 45 times [2021-03-10 22:29:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:43,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273659554] [2021-03-10 22:29:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:43,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273659554] [2021-03-10 22:29:43,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409320678] [2021-03-10 22:29:43,505 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 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 [2021-03-10 22:29:43,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:43,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:43,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:43,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:43,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:43,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861438897] [2021-03-10 22:29:43,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:43,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:43,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:43,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:43,768 INFO L87 Difference]: Start difference. First operand 532 states and 1297 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:44,202 INFO L93 Difference]: Finished difference Result 698 states and 1688 transitions. [2021-03-10 22:29:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:44,204 INFO L225 Difference]: With dead ends: 698 [2021-03-10 22:29:44,204 INFO L226 Difference]: Without dead ends: 660 [2021-03-10 22:29:44,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:29:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-03-10 22:29:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 532. [2021-03-10 22:29:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.4425612052730696) internal successors, (1297), 531 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1297 transitions. [2021-03-10 22:29:44,211 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1297 transitions. Word has length 28 [2021-03-10 22:29:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:44,211 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1297 transitions. [2021-03-10 22:29:44,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1297 transitions. [2021-03-10 22:29:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:44,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:44,211 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:44,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-10 22:29:44,412 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 46 times [2021-03-10 22:29:44,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:44,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856681579] [2021-03-10 22:29:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:44,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856681579] [2021-03-10 22:29:44,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789675326] [2021-03-10 22:29:44,495 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 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 [2021-03-10 22:29:44,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:44,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:44,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844338891] [2021-03-10 22:29:44,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:44,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:44,773 INFO L87 Difference]: Start difference. First operand 532 states and 1297 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:45,240 INFO L93 Difference]: Finished difference Result 666 states and 1616 transitions. [2021-03-10 22:29:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:45,242 INFO L225 Difference]: With dead ends: 666 [2021-03-10 22:29:45,242 INFO L226 Difference]: Without dead ends: 644 [2021-03-10 22:29:45,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-03-10 22:29:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 548. [2021-03-10 22:29:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.4442413162705665) internal successors, (1337), 547 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1337 transitions. [2021-03-10 22:29:45,249 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1337 transitions. Word has length 28 [2021-03-10 22:29:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:45,249 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1337 transitions. [2021-03-10 22:29:45,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1337 transitions. [2021-03-10 22:29:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:45,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:45,250 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:45,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 22:29:45,463 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1370406070, now seen corresponding path program 47 times [2021-03-10 22:29:45,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:45,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33750596] [2021-03-10 22:29:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:45,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33750596] [2021-03-10 22:29:45,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684853962] [2021-03-10 22:29:45,548 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:45,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:29:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:45,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:45,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:45,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450578339] [2021-03-10 22:29:45,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:45,828 INFO L87 Difference]: Start difference. First operand 548 states and 1337 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:46,313 INFO L93 Difference]: Finished difference Result 682 states and 1644 transitions. [2021-03-10 22:29:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:29:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:46,315 INFO L225 Difference]: With dead ends: 682 [2021-03-10 22:29:46,315 INFO L226 Difference]: Without dead ends: 636 [2021-03-10 22:29:46,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:29:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-03-10 22:29:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-03-10 22:29:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4458259325044405) internal successors, (1377), 563 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1377 transitions. [2021-03-10 22:29:46,322 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1377 transitions. Word has length 28 [2021-03-10 22:29:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:46,322 INFO L480 AbstractCegarLoop]: Abstraction has 564 states and 1377 transitions. [2021-03-10 22:29:46,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1377 transitions. [2021-03-10 22:29:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:46,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:46,323 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:46,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-03-10 22:29:46,524 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1626330114, now seen corresponding path program 48 times [2021-03-10 22:29:46,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:46,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750585660] [2021-03-10 22:29:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750585660] [2021-03-10 22:29:46,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478314401] [2021-03-10 22:29:46,610 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 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 [2021-03-10 22:29:46,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:46,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:46,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:46,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:46,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544627905] [2021-03-10 22:29:46,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:46,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:46,836 INFO L87 Difference]: Start difference. First operand 564 states and 1377 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:47,174 INFO L93 Difference]: Finished difference Result 738 states and 1792 transitions. [2021-03-10 22:29:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:47,175 INFO L225 Difference]: With dead ends: 738 [2021-03-10 22:29:47,175 INFO L226 Difference]: Without dead ends: 708 [2021-03-10 22:29:47,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-03-10 22:29:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 580. [2021-03-10 22:29:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.447322970639033) internal successors, (1417), 579 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1417 transitions. [2021-03-10 22:29:47,182 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1417 transitions. Word has length 28 [2021-03-10 22:29:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:47,182 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1417 transitions. [2021-03-10 22:29:47,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1417 transitions. [2021-03-10 22:29:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:47,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:47,183 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:47,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:47,384 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 49 times [2021-03-10 22:29:47,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:47,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136612133] [2021-03-10 22:29:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136612133] [2021-03-10 22:29:47,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455146860] [2021-03-10 22:29:47,478 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 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 [2021-03-10 22:29:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:47,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:47,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400017517] [2021-03-10 22:29:47,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:47,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:47,724 INFO L87 Difference]: Start difference. First operand 580 states and 1417 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:48,043 INFO L93 Difference]: Finished difference Result 722 states and 1752 transitions. [2021-03-10 22:29:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:48,044 INFO L225 Difference]: With dead ends: 722 [2021-03-10 22:29:48,044 INFO L226 Difference]: Without dead ends: 692 [2021-03-10 22:29:48,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-03-10 22:29:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 588. [2021-03-10 22:29:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4480408858603067) internal successors, (1437), 587 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1437 transitions. [2021-03-10 22:29:48,051 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1437 transitions. Word has length 28 [2021-03-10 22:29:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:48,051 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1437 transitions. [2021-03-10 22:29:48,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1437 transitions. [2021-03-10 22:29:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:48,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:48,052 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:48,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:48,252 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:48,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1221808518, now seen corresponding path program 50 times [2021-03-10 22:29:48,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:48,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247132112] [2021-03-10 22:29:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247132112] [2021-03-10 22:29:48,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057094229] [2021-03-10 22:29:48,318 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 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 [2021-03-10 22:29:48,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:29:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:48,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:48,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:48,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347059556] [2021-03-10 22:29:48,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:48,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:48,560 INFO L87 Difference]: Start difference. First operand 588 states and 1437 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:48,844 INFO L93 Difference]: Finished difference Result 698 states and 1696 transitions. [2021-03-10 22:29:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:48,845 INFO L225 Difference]: With dead ends: 698 [2021-03-10 22:29:48,845 INFO L226 Difference]: Without dead ends: 676 [2021-03-10 22:29:48,845 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:48,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-03-10 22:29:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 588. [2021-03-10 22:29:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4480408858603067) internal successors, (1437), 587 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1437 transitions. [2021-03-10 22:29:48,852 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1437 transitions. Word has length 28 [2021-03-10 22:29:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:48,852 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1437 transitions. [2021-03-10 22:29:48,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1437 transitions. [2021-03-10 22:29:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:48,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:48,853 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:49,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:49,068 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 51 times [2021-03-10 22:29:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:49,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952071400] [2021-03-10 22:29:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952071400] [2021-03-10 22:29:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699234179] [2021-03-10 22:29:49,153 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:49,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:49,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:49,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:49,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:49,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77463383] [2021-03-10 22:29:49,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:49,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:49,440 INFO L87 Difference]: Start difference. First operand 588 states and 1437 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:49,884 INFO L93 Difference]: Finished difference Result 778 states and 1896 transitions. [2021-03-10 22:29:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:49,885 INFO L225 Difference]: With dead ends: 778 [2021-03-10 22:29:49,886 INFO L226 Difference]: Without dead ends: 756 [2021-03-10 22:29:49,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-03-10 22:29:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 604. [2021-03-10 22:29:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.4494195688225537) internal successors, (1477), 603 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1477 transitions. [2021-03-10 22:29:49,893 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1477 transitions. Word has length 28 [2021-03-10 22:29:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:49,893 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 1477 transitions. [2021-03-10 22:29:49,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1477 transitions. [2021-03-10 22:29:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:49,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:49,894 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:50,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:50,109 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1560146054, now seen corresponding path program 52 times [2021-03-10 22:29:50,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:50,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598598272] [2021-03-10 22:29:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598598272] [2021-03-10 22:29:50,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774694499] [2021-03-10 22:29:50,234 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 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 [2021-03-10 22:29:50,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:50,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:50,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269540853] [2021-03-10 22:29:50,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:50,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:50,499 INFO L87 Difference]: Start difference. First operand 604 states and 1477 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:50,830 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-03-10 22:29:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:50,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:50,831 INFO L225 Difference]: With dead ends: 770 [2021-03-10 22:29:50,831 INFO L226 Difference]: Without dead ends: 748 [2021-03-10 22:29:50,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-03-10 22:29:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 620. [2021-03-10 22:29:50,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4507269789983845) internal successors, (1517), 619 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1517 transitions. [2021-03-10 22:29:50,840 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1517 transitions. Word has length 28 [2021-03-10 22:29:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:50,840 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1517 transitions. [2021-03-10 22:29:50,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1517 transitions. [2021-03-10 22:29:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:50,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:50,841 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:51,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-03-10 22:29:51,041 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1766084486, now seen corresponding path program 53 times [2021-03-10 22:29:51,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:51,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576520638] [2021-03-10 22:29:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576520638] [2021-03-10 22:29:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623845559] [2021-03-10 22:29:51,132 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 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 [2021-03-10 22:29:51,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:29:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:51,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:51,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280909922] [2021-03-10 22:29:51,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:51,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:51,361 INFO L87 Difference]: Start difference. First operand 620 states and 1517 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:51,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:51,696 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-03-10 22:29:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:51,698 INFO L225 Difference]: With dead ends: 778 [2021-03-10 22:29:51,698 INFO L226 Difference]: Without dead ends: 740 [2021-03-10 22:29:51,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-03-10 22:29:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 644. [2021-03-10 22:29:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.452566096423017) internal successors, (1577), 643 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1577 transitions. [2021-03-10 22:29:51,707 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1577 transitions. Word has length 28 [2021-03-10 22:29:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:51,707 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1577 transitions. [2021-03-10 22:29:51,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1577 transitions. [2021-03-10 22:29:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:51,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:51,708 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:51,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:51,923 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 54 times [2021-03-10 22:29:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:51,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019845243] [2021-03-10 22:29:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:52,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019845243] [2021-03-10 22:29:52,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512898803] [2021-03-10 22:29:52,064 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 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 [2021-03-10 22:29:52,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:52,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:52,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:52,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919036895] [2021-03-10 22:29:52,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:52,390 INFO L87 Difference]: Start difference. First operand 644 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:52,831 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-03-10 22:29:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:52,833 INFO L225 Difference]: With dead ends: 778 [2021-03-10 22:29:52,833 INFO L226 Difference]: Without dead ends: 740 [2021-03-10 22:29:52,833 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-03-10 22:29:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 644. [2021-03-10 22:29:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.452566096423017) internal successors, (1577), 643 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1577 transitions. [2021-03-10 22:29:52,841 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1577 transitions. Word has length 28 [2021-03-10 22:29:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:52,841 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1577 transitions. [2021-03-10 22:29:52,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1577 transitions. [2021-03-10 22:29:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:52,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:52,843 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:53,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:53,063 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 55 times [2021-03-10 22:29:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:53,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391588444] [2021-03-10 22:29:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:53,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391588444] [2021-03-10 22:29:53,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859639003] [2021-03-10 22:29:53,153 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 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 [2021-03-10 22:29:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:53,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:53,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:53,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714243848] [2021-03-10 22:29:53,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:53,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:53,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:53,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:53,442 INFO L87 Difference]: Start difference. First operand 644 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:53,784 INFO L93 Difference]: Finished difference Result 786 states and 1912 transitions. [2021-03-10 22:29:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:53,786 INFO L225 Difference]: With dead ends: 786 [2021-03-10 22:29:53,786 INFO L226 Difference]: Without dead ends: 756 [2021-03-10 22:29:53,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-03-10 22:29:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 636. [2021-03-10 22:29:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-03-10 22:29:53,793 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-03-10 22:29:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:53,793 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-03-10 22:29:53,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-03-10 22:29:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:53,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:53,794 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:53,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:53,995 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -490942086, now seen corresponding path program 56 times [2021-03-10 22:29:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:53,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019554720] [2021-03-10 22:29:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019554720] [2021-03-10 22:29:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554427562] [2021-03-10 22:29:54,114 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 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 [2021-03-10 22:29:54,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:54,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:54,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:54,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017955811] [2021-03-10 22:29:54,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:54,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:54,353 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:54,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:54,682 INFO L93 Difference]: Finished difference Result 786 states and 1908 transitions. [2021-03-10 22:29:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:54,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:54,684 INFO L225 Difference]: With dead ends: 786 [2021-03-10 22:29:54,684 INFO L226 Difference]: Without dead ends: 748 [2021-03-10 22:29:54,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:29:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-03-10 22:29:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 636. [2021-03-10 22:29:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-03-10 22:29:54,691 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-03-10 22:29:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:54,691 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-03-10 22:29:54,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-03-10 22:29:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:54,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:54,692 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:54,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-03-10 22:29:54,899 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 57 times [2021-03-10 22:29:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:54,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223926642] [2021-03-10 22:29:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:55,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223926642] [2021-03-10 22:29:55,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881150734] [2021-03-10 22:29:55,009 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 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 [2021-03-10 22:29:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:29:55,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:55,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:55,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:55,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263783914] [2021-03-10 22:29:55,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:55,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:55,294 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:55,714 INFO L93 Difference]: Finished difference Result 762 states and 1856 transitions. [2021-03-10 22:29:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:55,715 INFO L225 Difference]: With dead ends: 762 [2021-03-10 22:29:55,715 INFO L226 Difference]: Without dead ends: 740 [2021-03-10 22:29:55,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-03-10 22:29:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 620. [2021-03-10 22:29:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4507269789983845) internal successors, (1517), 619 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1517 transitions. [2021-03-10 22:29:55,725 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1517 transitions. Word has length 28 [2021-03-10 22:29:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:55,725 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1517 transitions. [2021-03-10 22:29:55,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1517 transitions. [2021-03-10 22:29:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:55,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:55,726 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:55,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:55,927 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:55,927 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 58 times [2021-03-10 22:29:55,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:55,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485912669] [2021-03-10 22:29:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:55,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485912669] [2021-03-10 22:29:55,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404599972] [2021-03-10 22:29:55,999 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 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 [2021-03-10 22:29:56,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:29:56,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:56,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:56,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:56,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:56,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046636725] [2021-03-10 22:29:56,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:56,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:56,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:56,215 INFO L87 Difference]: Start difference. First operand 620 states and 1517 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:56,503 INFO L93 Difference]: Finished difference Result 746 states and 1808 transitions. [2021-03-10 22:29:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:29:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:56,505 INFO L225 Difference]: With dead ends: 746 [2021-03-10 22:29:56,505 INFO L226 Difference]: Without dead ends: 708 [2021-03-10 22:29:56,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:29:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-03-10 22:29:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 636. [2021-03-10 22:29:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-03-10 22:29:56,512 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-03-10 22:29:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:56,512 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-03-10 22:29:56,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-03-10 22:29:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:56,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:56,513 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:56,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:56,714 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 59 times [2021-03-10 22:29:56,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:56,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371289485] [2021-03-10 22:29:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:56,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371289485] [2021-03-10 22:29:56,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307944952] [2021-03-10 22:29:56,787 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 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 [2021-03-10 22:29:56,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:29:56,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:56,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:56,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:57,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:57,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812644142] [2021-03-10 22:29:57,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:57,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:57,012 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:57,437 INFO L93 Difference]: Finished difference Result 778 states and 1884 transitions. [2021-03-10 22:29:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:29:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:57,439 INFO L225 Difference]: With dead ends: 778 [2021-03-10 22:29:57,439 INFO L226 Difference]: Without dead ends: 732 [2021-03-10 22:29:57,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:29:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-03-10 22:29:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 652. [2021-03-10 22:29:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.453149001536098) internal successors, (1597), 651 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1597 transitions. [2021-03-10 22:29:57,445 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1597 transitions. Word has length 28 [2021-03-10 22:29:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:57,446 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1597 transitions. [2021-03-10 22:29:57,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1597 transitions. [2021-03-10 22:29:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:57,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:57,446 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:57,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable619 [2021-03-10 22:29:57,650 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2106666118, now seen corresponding path program 60 times [2021-03-10 22:29:57,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:57,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176405671] [2021-03-10 22:29:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:57,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176405671] [2021-03-10 22:29:57,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185039897] [2021-03-10 22:29:57,749 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:57,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:29:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:58,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:58,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:58,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788069716] [2021-03-10 22:29:58,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:58,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:58,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:58,016 INFO L87 Difference]: Start difference. First operand 652 states and 1597 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:58,330 INFO L93 Difference]: Finished difference Result 754 states and 1832 transitions. [2021-03-10 22:29:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:29:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:58,332 INFO L225 Difference]: With dead ends: 754 [2021-03-10 22:29:58,332 INFO L226 Difference]: Without dead ends: 724 [2021-03-10 22:29:58,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:29:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-03-10 22:29:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 652. [2021-03-10 22:29:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.453149001536098) internal successors, (1597), 651 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1597 transitions. [2021-03-10 22:29:58,339 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1597 transitions. Word has length 28 [2021-03-10 22:29:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:58,339 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1597 transitions. [2021-03-10 22:29:58,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1597 transitions. [2021-03-10 22:29:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:58,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:58,340 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:58,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-03-10 22:29:58,540 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 61 times [2021-03-10 22:29:58,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:58,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876947436] [2021-03-10 22:29:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:58,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876947436] [2021-03-10 22:29:58,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994642106] [2021-03-10 22:29:58,616 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:58,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:58,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:58,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569484989] [2021-03-10 22:29:58,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:58,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:58,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:58,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:58,868 INFO L87 Difference]: Start difference. First operand 652 states and 1597 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:59,189 INFO L93 Difference]: Finished difference Result 762 states and 1856 transitions. [2021-03-10 22:29:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:29:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:29:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:59,191 INFO L225 Difference]: With dead ends: 762 [2021-03-10 22:29:59,191 INFO L226 Difference]: Without dead ends: 740 [2021-03-10 22:29:59,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:29:59,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-03-10 22:29:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 668. [2021-03-10 22:29:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-03-10 22:29:59,201 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-03-10 22:29:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:59,201 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-03-10 22:29:59,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:29:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-03-10 22:29:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:29:59,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:59,202 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:59,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:59,415 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1787267838, now seen corresponding path program 62 times [2021-03-10 22:29:59,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:59,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764260499] [2021-03-10 22:29:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:59,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764260499] [2021-03-10 22:29:59,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078648994] [2021-03-10 22:29:59,483 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 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 [2021-03-10 22:29:59,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:59,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:29:59,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:59,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:59,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:29:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175374539] [2021-03-10 22:29:59,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:29:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:29:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:29:59,705 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:00,124 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-03-10 22:30:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:00,126 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:30:00,126 INFO L226 Difference]: Without dead ends: 788 [2021-03-10 22:30:00,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:30:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-03-10 22:30:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 676. [2021-03-10 22:30:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:00,134 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:00,134 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:00,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:00,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:00,135 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:00,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-03-10 22:30:00,336 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 63 times [2021-03-10 22:30:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:00,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515329917] [2021-03-10 22:30:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:00,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515329917] [2021-03-10 22:30:00,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684738595] [2021-03-10 22:30:00,417 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 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 [2021-03-10 22:30:00,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:30:00,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:00,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:00,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908473157] [2021-03-10 22:30:00,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:00,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:00,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:00,654 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:00,993 INFO L93 Difference]: Finished difference Result 802 states and 1952 transitions. [2021-03-10 22:30:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:00,995 INFO L225 Difference]: With dead ends: 802 [2021-03-10 22:30:00,995 INFO L226 Difference]: Without dead ends: 772 [2021-03-10 22:30:00,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-03-10 22:30:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 676. [2021-03-10 22:30:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:01,002 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:01,002 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:01,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:01,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:01,003 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:01,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:01,204 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 64 times [2021-03-10 22:30:01,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:01,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145308643] [2021-03-10 22:30:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145308643] [2021-03-10 22:30:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605355687] [2021-03-10 22:30:01,375 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 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 [2021-03-10 22:30:01,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:01,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:01,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682763136] [2021-03-10 22:30:01,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:01,747 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:02,162 INFO L93 Difference]: Finished difference Result 842 states and 2056 transitions. [2021-03-10 22:30:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:02,165 INFO L225 Difference]: With dead ends: 842 [2021-03-10 22:30:02,165 INFO L226 Difference]: Without dead ends: 820 [2021-03-10 22:30:02,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:30:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-03-10 22:30:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 684. [2021-03-10 22:30:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-03-10 22:30:02,173 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-03-10 22:30:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:02,173 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-03-10 22:30:02,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-03-10 22:30:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:02,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:02,174 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:02,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-03-10 22:30:02,387 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 65 times [2021-03-10 22:30:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:02,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445192195] [2021-03-10 22:30:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:02,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445192195] [2021-03-10 22:30:02,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801694679] [2021-03-10 22:30:02,594 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 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 [2021-03-10 22:30:02,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:30:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:02,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:02,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:02,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027217678] [2021-03-10 22:30:02,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:02,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:02,910 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:03,249 INFO L93 Difference]: Finished difference Result 850 states and 2076 transitions. [2021-03-10 22:30:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:03,250 INFO L225 Difference]: With dead ends: 850 [2021-03-10 22:30:03,250 INFO L226 Difference]: Without dead ends: 828 [2021-03-10 22:30:03,251 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-03-10 22:30:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 676. [2021-03-10 22:30:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:03,257 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:03,258 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:03,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:03,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:03,259 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:03,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-03-10 22:30:03,464 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 66 times [2021-03-10 22:30:03,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:03,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511107221] [2021-03-10 22:30:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:03,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511107221] [2021-03-10 22:30:03,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984999724] [2021-03-10 22:30:03,560 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 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 [2021-03-10 22:30:03,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:30:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:03,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:03,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297957937] [2021-03-10 22:30:03,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:03,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:03,791 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:04,092 INFO L93 Difference]: Finished difference Result 810 states and 1968 transitions. [2021-03-10 22:30:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:04,094 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:30:04,094 INFO L226 Difference]: Without dead ends: 772 [2021-03-10 22:30:04,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-03-10 22:30:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 684. [2021-03-10 22:30:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-03-10 22:30:04,101 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-03-10 22:30:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:04,101 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-03-10 22:30:04,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-03-10 22:30:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:04,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:04,102 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:04,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-03-10 22:30:04,303 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 67 times [2021-03-10 22:30:04,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:04,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209336086] [2021-03-10 22:30:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:04,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209336086] [2021-03-10 22:30:04,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121262884] [2021-03-10 22:30:04,396 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 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 [2021-03-10 22:30:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:04,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:04,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:04,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:04,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922161639] [2021-03-10 22:30:04,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:04,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:04,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:04,683 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:05,075 INFO L93 Difference]: Finished difference Result 826 states and 2008 transitions. [2021-03-10 22:30:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:05,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:05,076 INFO L225 Difference]: With dead ends: 826 [2021-03-10 22:30:05,076 INFO L226 Difference]: Without dead ends: 788 [2021-03-10 22:30:05,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-03-10 22:30:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-03-10 22:30:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-03-10 22:30:05,083 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-03-10 22:30:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:05,083 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-03-10 22:30:05,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-03-10 22:30:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:05,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:05,084 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:05,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:05,295 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:05,296 INFO L82 PathProgramCache]: Analyzing trace with hash 578117558, now seen corresponding path program 68 times [2021-03-10 22:30:05,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:05,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851919374] [2021-03-10 22:30:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:05,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851919374] [2021-03-10 22:30:05,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679131728] [2021-03-10 22:30:05,392 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 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 [2021-03-10 22:30:05,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:05,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:05,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:05,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:05,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395443460] [2021-03-10 22:30:05,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:05,691 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:06,129 INFO L93 Difference]: Finished difference Result 850 states and 2064 transitions. [2021-03-10 22:30:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:06,130 INFO L225 Difference]: With dead ends: 850 [2021-03-10 22:30:06,130 INFO L226 Difference]: Without dead ends: 804 [2021-03-10 22:30:06,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:30:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-03-10 22:30:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 660. [2021-03-10 22:30:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-03-10 22:30:06,138 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-03-10 22:30:06,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:06,138 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-03-10 22:30:06,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-03-10 22:30:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:06,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:06,139 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:06,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-03-10 22:30:06,340 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash 52089722, now seen corresponding path program 69 times [2021-03-10 22:30:06,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:06,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991046921] [2021-03-10 22:30:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991046921] [2021-03-10 22:30:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302866675] [2021-03-10 22:30:06,403 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:30:06,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:30:06,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:06,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:06,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:06,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020407377] [2021-03-10 22:30:06,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:06,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:06,615 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:06,953 INFO L93 Difference]: Finished difference Result 786 states and 1908 transitions. [2021-03-10 22:30:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:06,955 INFO L225 Difference]: With dead ends: 786 [2021-03-10 22:30:06,955 INFO L226 Difference]: Without dead ends: 748 [2021-03-10 22:30:06,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:30:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-03-10 22:30:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 676. [2021-03-10 22:30:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:06,962 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:06,962 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:06,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:06,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:06,963 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:07,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:07,164 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:07,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 239780022, now seen corresponding path program 70 times [2021-03-10 22:30:07,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:07,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181833657] [2021-03-10 22:30:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:07,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181833657] [2021-03-10 22:30:07,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673087943] [2021-03-10 22:30:07,235 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 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 [2021-03-10 22:30:07,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:07,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:07,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:07,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147694500] [2021-03-10 22:30:07,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:07,469 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:07,848 INFO L93 Difference]: Finished difference Result 818 states and 1984 transitions. [2021-03-10 22:30:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:07,850 INFO L225 Difference]: With dead ends: 818 [2021-03-10 22:30:07,850 INFO L226 Difference]: Without dead ends: 772 [2021-03-10 22:30:07,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:30:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-03-10 22:30:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 684. [2021-03-10 22:30:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-03-10 22:30:07,858 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-03-10 22:30:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:07,858 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-03-10 22:30:07,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-03-10 22:30:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:07,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:07,859 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:08,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable764,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:08,075 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:08,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1225296774, now seen corresponding path program 71 times [2021-03-10 22:30:08,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:08,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078170314] [2021-03-10 22:30:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078170314] [2021-03-10 22:30:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500108014] [2021-03-10 22:30:08,167 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 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 [2021-03-10 22:30:08,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:30:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:08,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:08,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:08,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:08,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950820162] [2021-03-10 22:30:08,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:08,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:08,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:08,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:08,402 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:08,726 INFO L93 Difference]: Finished difference Result 802 states and 1952 transitions. [2021-03-10 22:30:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:08,727 INFO L225 Difference]: With dead ends: 802 [2021-03-10 22:30:08,727 INFO L226 Difference]: Without dead ends: 772 [2021-03-10 22:30:08,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-03-10 22:30:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 660. [2021-03-10 22:30:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-03-10 22:30:08,734 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-03-10 22:30:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:08,734 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-03-10 22:30:08,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-03-10 22:30:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:08,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:08,735 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:08,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-03-10 22:30:08,947 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 72 times [2021-03-10 22:30:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:08,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772777850] [2021-03-10 22:30:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:09,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772777850] [2021-03-10 22:30:09,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371892086] [2021-03-10 22:30:09,021 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 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 [2021-03-10 22:30:09,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:30:09,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:09,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:09,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:09,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491890961] [2021-03-10 22:30:09,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:09,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:09,257 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:09,867 INFO L93 Difference]: Finished difference Result 826 states and 2012 transitions. [2021-03-10 22:30:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:09,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:09,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:09,868 INFO L225 Difference]: With dead ends: 826 [2021-03-10 22:30:09,868 INFO L226 Difference]: Without dead ends: 796 [2021-03-10 22:30:09,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 660.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-03-10 22:30:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 660. [2021-03-10 22:30:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-03-10 22:30:09,875 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-03-10 22:30:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:09,875 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-03-10 22:30:09,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-03-10 22:30:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:09,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:09,876 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:10,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-03-10 22:30:10,077 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1736594298, now seen corresponding path program 73 times [2021-03-10 22:30:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:10,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686404942] [2021-03-10 22:30:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686404942] [2021-03-10 22:30:10,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491921573] [2021-03-10 22:30:10,193 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 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 [2021-03-10 22:30:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:10,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:10,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:10,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561005822] [2021-03-10 22:30:10,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:10,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:10,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:10,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:10,483 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:10,852 INFO L93 Difference]: Finished difference Result 802 states and 1948 transitions. [2021-03-10 22:30:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:10,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:10,853 INFO L225 Difference]: With dead ends: 802 [2021-03-10 22:30:10,853 INFO L226 Difference]: Without dead ends: 764 [2021-03-10 22:30:10,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-03-10 22:30:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 668. [2021-03-10 22:30:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-03-10 22:30:10,861 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-03-10 22:30:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:10,861 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-03-10 22:30:10,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-03-10 22:30:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:10,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:10,862 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:11,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable801,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:11,067 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 74 times [2021-03-10 22:30:11,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:11,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63814437] [2021-03-10 22:30:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63814437] [2021-03-10 22:30:11,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472979833] [2021-03-10 22:30:11,190 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 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 [2021-03-10 22:30:11,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:11,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:11,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:11,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760685014] [2021-03-10 22:30:11,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:11,504 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:12,012 INFO L93 Difference]: Finished difference Result 850 states and 2064 transitions. [2021-03-10 22:30:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:12,013 INFO L225 Difference]: With dead ends: 850 [2021-03-10 22:30:12,014 INFO L226 Difference]: Without dead ends: 804 [2021-03-10 22:30:12,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:30:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-03-10 22:30:12,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 660. [2021-03-10 22:30:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-03-10 22:30:12,021 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-03-10 22:30:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:12,021 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-03-10 22:30:12,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:12,021 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-03-10 22:30:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:12,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:12,022 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:12,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-03-10 22:30:12,222 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 75 times [2021-03-10 22:30:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:12,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935485777] [2021-03-10 22:30:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:12,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935485777] [2021-03-10 22:30:12,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853635292] [2021-03-10 22:30:12,290 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 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 [2021-03-10 22:30:12,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:30:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:12,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:12,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:12,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080857648] [2021-03-10 22:30:12,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:12,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:12,526 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:12,805 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-03-10 22:30:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:12,807 INFO L225 Difference]: With dead ends: 778 [2021-03-10 22:30:12,807 INFO L226 Difference]: Without dead ends: 740 [2021-03-10 22:30:12,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-03-10 22:30:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 668. [2021-03-10 22:30:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-03-10 22:30:12,814 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-03-10 22:30:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:12,814 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-03-10 22:30:12,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-03-10 22:30:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:12,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:12,815 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:13,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:13,016 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:13,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 76 times [2021-03-10 22:30:13,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:13,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303342939] [2021-03-10 22:30:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:13,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303342939] [2021-03-10 22:30:13,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818935479] [2021-03-10 22:30:13,157 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 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 [2021-03-10 22:30:13,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:13,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:13,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:13,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:13,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110266900] [2021-03-10 22:30:13,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:13,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:13,415 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:13,821 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-03-10 22:30:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:13,822 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:30:13,822 INFO L226 Difference]: Without dead ends: 788 [2021-03-10 22:30:13,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:30:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-03-10 22:30:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 676. [2021-03-10 22:30:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:13,830 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:13,830 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:13,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:13,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:13,831 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:14,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable843 [2021-03-10 22:30:14,043 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 77 times [2021-03-10 22:30:14,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:14,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622138199] [2021-03-10 22:30:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:14,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622138199] [2021-03-10 22:30:14,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911585610] [2021-03-10 22:30:14,191 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 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 [2021-03-10 22:30:14,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:30:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:14,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:14,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:14,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544378520] [2021-03-10 22:30:14,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:14,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:14,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:14,463 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:14,930 INFO L93 Difference]: Finished difference Result 754 states and 1836 transitions. [2021-03-10 22:30:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:14,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:14,931 INFO L225 Difference]: With dead ends: 754 [2021-03-10 22:30:14,931 INFO L226 Difference]: Without dead ends: 732 [2021-03-10 22:30:14,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:30:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-03-10 22:30:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 676. [2021-03-10 22:30:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-03-10 22:30:14,939 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-03-10 22:30:14,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:14,939 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-03-10 22:30:14,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-03-10 22:30:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:14,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:14,940 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:15,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-03-10 22:30:15,140 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:15,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 78 times [2021-03-10 22:30:15,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:15,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44995064] [2021-03-10 22:30:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:15,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44995064] [2021-03-10 22:30:15,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432559489] [2021-03-10 22:30:15,205 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 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 [2021-03-10 22:30:15,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:30:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:15,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:15,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:15,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402708353] [2021-03-10 22:30:15,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:15,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:15,469 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:15,869 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-03-10 22:30:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:15,870 INFO L225 Difference]: With dead ends: 810 [2021-03-10 22:30:15,870 INFO L226 Difference]: Without dead ends: 788 [2021-03-10 22:30:15,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:30:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-03-10 22:30:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-03-10 22:30:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-03-10 22:30:15,877 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-03-10 22:30:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:15,877 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-03-10 22:30:15,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-03-10 22:30:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:15,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:15,878 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:16,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable868 [2021-03-10 22:30:16,079 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 79 times [2021-03-10 22:30:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571801676] [2021-03-10 22:30:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571801676] [2021-03-10 22:30:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829490325] [2021-03-10 22:30:16,214 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 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 [2021-03-10 22:30:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:16,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:16,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:16,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538239365] [2021-03-10 22:30:16,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:16,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:16,481 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:16,938 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-03-10 22:30:16,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:16,939 INFO L225 Difference]: With dead ends: 842 [2021-03-10 22:30:16,940 INFO L226 Difference]: Without dead ends: 812 [2021-03-10 22:30:16,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:30:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-03-10 22:30:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-03-10 22:30:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-03-10 22:30:16,947 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-03-10 22:30:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:16,947 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-03-10 22:30:16,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-03-10 22:30:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:16,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:16,948 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:17,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable887,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:17,149 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 80 times [2021-03-10 22:30:17,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:17,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205707215] [2021-03-10 22:30:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205707215] [2021-03-10 22:30:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904596170] [2021-03-10 22:30:17,228 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 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 [2021-03-10 22:30:17,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:17,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:17,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:17,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:17,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652779592] [2021-03-10 22:30:17,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:17,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:17,451 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:17,808 INFO L93 Difference]: Finished difference Result 842 states and 2056 transitions. [2021-03-10 22:30:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:17,809 INFO L225 Difference]: With dead ends: 842 [2021-03-10 22:30:17,809 INFO L226 Difference]: Without dead ends: 820 [2021-03-10 22:30:17,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:30:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-03-10 22:30:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 708. [2021-03-10 22:30:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.4568599717114568) internal successors, (1737), 707 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1737 transitions. [2021-03-10 22:30:17,817 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1737 transitions. Word has length 28 [2021-03-10 22:30:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:17,817 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 1737 transitions. [2021-03-10 22:30:17,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1737 transitions. [2021-03-10 22:30:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:17,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:17,818 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:18,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable902 [2021-03-10 22:30:18,019 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 81 times [2021-03-10 22:30:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:18,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196510520] [2021-03-10 22:30:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196510520] [2021-03-10 22:30:18,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055701522] [2021-03-10 22:30:18,106 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 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 [2021-03-10 22:30:18,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:30:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:18,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:18,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191379897] [2021-03-10 22:30:18,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:18,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:18,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:18,343 INFO L87 Difference]: Start difference. First operand 708 states and 1737 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:18,627 INFO L93 Difference]: Finished difference Result 826 states and 2012 transitions. [2021-03-10 22:30:18,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:30:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:18,629 INFO L225 Difference]: With dead ends: 826 [2021-03-10 22:30:18,629 INFO L226 Difference]: Without dead ends: 796 [2021-03-10 22:30:18,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:30:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-03-10 22:30:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 724. [2021-03-10 22:30:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-03-10 22:30:18,636 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-03-10 22:30:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:18,636 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-03-10 22:30:18,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-03-10 22:30:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:18,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:18,637 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:18,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable912 [2021-03-10 22:30:18,838 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 82 times [2021-03-10 22:30:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:18,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304887032] [2021-03-10 22:30:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304887032] [2021-03-10 22:30:18,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829084296] [2021-03-10 22:30:18,948 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 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 [2021-03-10 22:30:18,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:18,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:19,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:19,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681635332] [2021-03-10 22:30:19,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:19,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:19,204 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:19,609 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-03-10 22:30:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:19,610 INFO L225 Difference]: With dead ends: 818 [2021-03-10 22:30:19,610 INFO L226 Difference]: Without dead ends: 796 [2021-03-10 22:30:19,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:30:19,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-03-10 22:30:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 724. [2021-03-10 22:30:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-03-10 22:30:19,619 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-03-10 22:30:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:19,619 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-03-10 22:30:19,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-03-10 22:30:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 22:30:19,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:19,620 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:19,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:19,827 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1790463502, now seen corresponding path program 83 times [2021-03-10 22:30:19,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:19,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933342918] [2021-03-10 22:30:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:19,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933342918] [2021-03-10 22:30:19,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657663339] [2021-03-10 22:30:19,932 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 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 [2021-03-10 22:30:19,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:30:19,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:30:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:20,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:20,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 22:30:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039702867] [2021-03-10 22:30:20,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:30:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:30:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:30:20,165 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:20,488 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-03-10 22:30:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:30:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 [2021-03-10 22:30:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:20,489 INFO L225 Difference]: With dead ends: 818 [2021-03-10 22:30:20,489 INFO L226 Difference]: Without dead ends: 796 [2021-03-10 22:30:20,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:30:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-03-10 22:30:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-03-10 22:30:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-03-10 22:30:20,497 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-03-10 22:30:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:20,497 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-03-10 22:30:20,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-03-10 22:30:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-03-10 22:30:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:20,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:20,498 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:20,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:20,714 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:20,715 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 84 times [2021-03-10 22:30:20,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:20,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361739024] [2021-03-10 22:30:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:20,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361739024] [2021-03-10 22:30:20,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204224931] [2021-03-10 22:30:20,844 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 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 [2021-03-10 22:30:20,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:30:20,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:21,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:21,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:21,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075242187] [2021-03-10 22:30:21,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:21,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:21,135 INFO L87 Difference]: Start difference. First operand 716 states and 1757 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) [2021-03-10 22:30:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:21,510 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-03-10 22:30:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:21,511 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 30 [2021-03-10 22:30:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:21,512 INFO L225 Difference]: With dead ends: 818 [2021-03-10 22:30:21,512 INFO L226 Difference]: Without dead ends: 796 [2021-03-10 22:30:21,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:30:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-03-10 22:30:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 732. [2021-03-10 22:30:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-03-10 22:30:21,519 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 30 [2021-03-10 22:30:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:21,519 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-03-10 22:30:21,519 INFO L481 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) [2021-03-10 22:30:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-03-10 22:30:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:21,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:21,520 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:21,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:21,721 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 85 times [2021-03-10 22:30:21,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:21,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101262996] [2021-03-10 22:30:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101262996] [2021-03-10 22:30:21,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062030703] [2021-03-10 22:30:21,838 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 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 [2021-03-10 22:30:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:22,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:22,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481284717] [2021-03-10 22:30:22,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:22,159 INFO L87 Difference]: Start difference. First operand 732 states and 1797 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) [2021-03-10 22:30:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:22,583 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-03-10 22:30:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:30:22,583 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 30 [2021-03-10 22:30:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:22,584 INFO L225 Difference]: With dead ends: 890 [2021-03-10 22:30:22,584 INFO L226 Difference]: Without dead ends: 860 [2021-03-10 22:30:22,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:30:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-03-10 22:30:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 740. [2021-03-10 22:30:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-03-10 22:30:22,592 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 30 [2021-03-10 22:30:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:22,592 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-03-10 22:30:22,592 INFO L481 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) [2021-03-10 22:30:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-03-10 22:30:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:22,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:22,593 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:22,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-03-10 22:30:22,793 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 86 times [2021-03-10 22:30:22,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:22,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009752506] [2021-03-10 22:30:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:22,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009752506] [2021-03-10 22:30:22,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095011325] [2021-03-10 22:30:22,924 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 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 [2021-03-10 22:30:22,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:23,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:23,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:23,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604038195] [2021-03-10 22:30:23,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:23,260 INFO L87 Difference]: Start difference. First operand 740 states and 1817 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) [2021-03-10 22:30:23,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:23,892 INFO L93 Difference]: Finished difference Result 986 states and 2408 transitions. [2021-03-10 22:30:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:30:23,892 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 30 [2021-03-10 22:30:23,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:23,894 INFO L225 Difference]: With dead ends: 986 [2021-03-10 22:30:23,894 INFO L226 Difference]: Without dead ends: 948 [2021-03-10 22:30:23,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:30:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-03-10 22:30:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 756. [2021-03-10 22:30:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-03-10 22:30:23,902 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 30 [2021-03-10 22:30:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:23,902 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-03-10 22:30:23,902 INFO L481 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) [2021-03-10 22:30:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-03-10 22:30:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:23,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:23,903 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:24,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-03-10 22:30:24,104 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1219313220, now seen corresponding path program 87 times [2021-03-10 22:30:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:24,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797656097] [2021-03-10 22:30:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797656097] [2021-03-10 22:30:24,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565966246] [2021-03-10 22:30:24,203 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:30:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:30:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:24,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:24,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:24,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413457399] [2021-03-10 22:30:24,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:24,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:24,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:24,494 INFO L87 Difference]: Start difference. First operand 756 states and 1857 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) [2021-03-10 22:30:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:24,884 INFO L93 Difference]: Finished difference Result 954 states and 2332 transitions. [2021-03-10 22:30:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:24,884 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 30 [2021-03-10 22:30:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:24,885 INFO L225 Difference]: With dead ends: 954 [2021-03-10 22:30:24,885 INFO L226 Difference]: Without dead ends: 924 [2021-03-10 22:30:24,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:30:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-03-10 22:30:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 772. [2021-03-10 22:30:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.4604409857328147) internal successors, (1897), 771 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1897 transitions. [2021-03-10 22:30:24,894 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1897 transitions. Word has length 30 [2021-03-10 22:30:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:24,894 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 1897 transitions. [2021-03-10 22:30:24,894 INFO L481 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) [2021-03-10 22:30:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1897 transitions. [2021-03-10 22:30:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:24,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:24,895 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:25,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-03-10 22:30:25,111 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 88 times [2021-03-10 22:30:25,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:25,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429508868] [2021-03-10 22:30:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:25,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429508868] [2021-03-10 22:30:25,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771385342] [2021-03-10 22:30:25,214 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 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 [2021-03-10 22:30:25,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:25,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:25,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704364849] [2021-03-10 22:30:25,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:25,532 INFO L87 Difference]: Start difference. First operand 772 states and 1897 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) [2021-03-10 22:30:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:26,030 INFO L93 Difference]: Finished difference Result 1002 states and 2448 transitions. [2021-03-10 22:30:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:26,030 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 30 [2021-03-10 22:30:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:26,031 INFO L225 Difference]: With dead ends: 1002 [2021-03-10 22:30:26,031 INFO L226 Difference]: Without dead ends: 964 [2021-03-10 22:30:26,032 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 670.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-03-10 22:30:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 796. [2021-03-10 22:30:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.4616352201257863) internal successors, (1957), 795 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1957 transitions. [2021-03-10 22:30:26,040 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1957 transitions. Word has length 30 [2021-03-10 22:30:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:26,040 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1957 transitions. [2021-03-10 22:30:26,040 INFO L481 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) [2021-03-10 22:30:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1957 transitions. [2021-03-10 22:30:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:26,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:26,042 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:26,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:26,242 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:26,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 89 times [2021-03-10 22:30:26,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:26,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135331681] [2021-03-10 22:30:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135331681] [2021-03-10 22:30:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005228003] [2021-03-10 22:30:26,412 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 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 [2021-03-10 22:30:26,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:30:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:26,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:26,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:26,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228851499] [2021-03-10 22:30:26,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:26,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:26,738 INFO L87 Difference]: Start difference. First operand 796 states and 1957 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) [2021-03-10 22:30:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:27,342 INFO L93 Difference]: Finished difference Result 1182 states and 2852 transitions. [2021-03-10 22:30:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:30:27,343 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 30 [2021-03-10 22:30:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:27,344 INFO L225 Difference]: With dead ends: 1182 [2021-03-10 22:30:27,344 INFO L226 Difference]: Without dead ends: 1140 [2021-03-10 22:30:27,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-03-10 22:30:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 852. [2021-03-10 22:30:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.4688601645123383) internal successors, (2101), 851 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2101 transitions. [2021-03-10 22:30:27,354 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2101 transitions. Word has length 30 [2021-03-10 22:30:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:27,354 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2101 transitions. [2021-03-10 22:30:27,354 INFO L481 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) [2021-03-10 22:30:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2101 transitions. [2021-03-10 22:30:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:27,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:27,355 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:27,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:27,556 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:27,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:27,556 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 90 times [2021-03-10 22:30:27,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:27,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162504794] [2021-03-10 22:30:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:27,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162504794] [2021-03-10 22:30:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367870344] [2021-03-10 22:30:27,673 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 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 [2021-03-10 22:30:27,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:30:27,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:28,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:28,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596372160] [2021-03-10 22:30:28,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:28,035 INFO L87 Difference]: Start difference. First operand 852 states and 2101 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) [2021-03-10 22:30:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:28,616 INFO L93 Difference]: Finished difference Result 1194 states and 2928 transitions. [2021-03-10 22:30:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:28,617 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 30 [2021-03-10 22:30:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:28,618 INFO L225 Difference]: With dead ends: 1194 [2021-03-10 22:30:28,618 INFO L226 Difference]: Without dead ends: 1148 [2021-03-10 22:30:28,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-03-10 22:30:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 940. [2021-03-10 22:30:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.4717784877529287) internal successors, (2321), 939 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2321 transitions. [2021-03-10 22:30:28,628 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2321 transitions. Word has length 30 [2021-03-10 22:30:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:28,628 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2321 transitions. [2021-03-10 22:30:28,628 INFO L481 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) [2021-03-10 22:30:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2321 transitions. [2021-03-10 22:30:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:28,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:28,629 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:28,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-03-10 22:30:28,843 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1466359492, now seen corresponding path program 91 times [2021-03-10 22:30:28,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:28,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509578919] [2021-03-10 22:30:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509578919] [2021-03-10 22:30:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171543992] [2021-03-10 22:30:29,024 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:30:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:29,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:29,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597190556] [2021-03-10 22:30:29,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:29,374 INFO L87 Difference]: Start difference. First operand 940 states and 2321 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) [2021-03-10 22:30:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:29,918 INFO L93 Difference]: Finished difference Result 1074 states and 2636 transitions. [2021-03-10 22:30:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:29,918 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 30 [2021-03-10 22:30:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:29,919 INFO L225 Difference]: With dead ends: 1074 [2021-03-10 22:30:29,919 INFO L226 Difference]: Without dead ends: 1044 [2021-03-10 22:30:29,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-03-10 22:30:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 948. [2021-03-10 22:30:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.4720168954593453) internal successors, (2341), 947 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2341 transitions. [2021-03-10 22:30:29,929 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2341 transitions. Word has length 30 [2021-03-10 22:30:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:29,929 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 2341 transitions. [2021-03-10 22:30:29,929 INFO L481 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) [2021-03-10 22:30:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2341 transitions. [2021-03-10 22:30:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:29,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:29,930 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:30,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:30,131 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 92 times [2021-03-10 22:30:30,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:30,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580996279] [2021-03-10 22:30:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580996279] [2021-03-10 22:30:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087620921] [2021-03-10 22:30:30,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:30:30,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:30,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:30,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:30,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:30,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038562740] [2021-03-10 22:30:30,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:30,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:30,603 INFO L87 Difference]: Start difference. First operand 948 states and 2341 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) [2021-03-10 22:30:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:31,132 INFO L93 Difference]: Finished difference Result 1296 states and 3151 transitions. [2021-03-10 22:30:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:31,132 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 30 [2021-03-10 22:30:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:31,134 INFO L225 Difference]: With dead ends: 1296 [2021-03-10 22:30:31,134 INFO L226 Difference]: Without dead ends: 1266 [2021-03-10 22:30:31,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-03-10 22:30:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1012. [2021-03-10 22:30:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.477744807121662) internal successors, (2505), 1011 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2505 transitions. [2021-03-10 22:30:31,145 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2505 transitions. Word has length 30 [2021-03-10 22:30:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:31,145 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2505 transitions. [2021-03-10 22:30:31,145 INFO L481 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) [2021-03-10 22:30:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2505 transitions. [2021-03-10 22:30:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:31,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:31,146 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:31,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1055,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:31,347 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 93 times [2021-03-10 22:30:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:31,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371057592] [2021-03-10 22:30:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:31,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371057592] [2021-03-10 22:30:31,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581343607] [2021-03-10 22:30:31,580 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 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 [2021-03-10 22:30:31,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:30:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:31,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:31,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:31,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:31,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733475999] [2021-03-10 22:30:31,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:31,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:31,954 INFO L87 Difference]: Start difference. First operand 1012 states and 2505 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) [2021-03-10 22:30:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:32,693 INFO L93 Difference]: Finished difference Result 1582 states and 3856 transitions. [2021-03-10 22:30:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:32,693 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 30 [2021-03-10 22:30:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:32,695 INFO L225 Difference]: With dead ends: 1582 [2021-03-10 22:30:32,695 INFO L226 Difference]: Without dead ends: 1524 [2021-03-10 22:30:32,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-03-10 22:30:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1124. [2021-03-10 22:30:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.4799643811219947) internal successors, (2785), 1123 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2785 transitions. [2021-03-10 22:30:32,706 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2785 transitions. Word has length 30 [2021-03-10 22:30:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:32,706 INFO L480 AbstractCegarLoop]: Abstraction has 1124 states and 2785 transitions. [2021-03-10 22:30:32,707 INFO L481 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) [2021-03-10 22:30:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2785 transitions. [2021-03-10 22:30:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:32,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:32,708 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:32,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:32,910 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 94 times [2021-03-10 22:30:32,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:32,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150301218] [2021-03-10 22:30:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:33,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150301218] [2021-03-10 22:30:33,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801283928] [2021-03-10 22:30:33,036 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 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 [2021-03-10 22:30:33,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:33,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:33,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:33,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262709558] [2021-03-10 22:30:33,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:33,387 INFO L87 Difference]: Start difference. First operand 1124 states and 2785 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) [2021-03-10 22:30:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:33,990 INFO L93 Difference]: Finished difference Result 1402 states and 3460 transitions. [2021-03-10 22:30:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:33,991 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 30 [2021-03-10 22:30:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:33,992 INFO L225 Difference]: With dead ends: 1402 [2021-03-10 22:30:33,992 INFO L226 Difference]: Without dead ends: 1372 [2021-03-10 22:30:33,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 808.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:33,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-03-10 22:30:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1156. [2021-03-10 22:30:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.4805194805194803) internal successors, (2865), 1155 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2865 transitions. [2021-03-10 22:30:34,003 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2865 transitions. Word has length 30 [2021-03-10 22:30:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:34,003 INFO L480 AbstractCegarLoop]: Abstraction has 1156 states and 2865 transitions. [2021-03-10 22:30:34,003 INFO L481 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) [2021-03-10 22:30:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2865 transitions. [2021-03-10 22:30:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:34,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:34,005 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:34,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:34,205 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:34,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash 91622392, now seen corresponding path program 95 times [2021-03-10 22:30:34,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:34,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315438291] [2021-03-10 22:30:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:34,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315438291] [2021-03-10 22:30:34,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815746075] [2021-03-10 22:30:34,346 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 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 [2021-03-10 22:30:34,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:30:34,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:34,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:34,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717028159] [2021-03-10 22:30:34,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:34,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:34,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:34,736 INFO L87 Difference]: Start difference. First operand 1156 states and 2865 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) [2021-03-10 22:30:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:35,346 INFO L93 Difference]: Finished difference Result 1458 states and 3596 transitions. [2021-03-10 22:30:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:35,346 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 30 [2021-03-10 22:30:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:35,348 INFO L225 Difference]: With dead ends: 1458 [2021-03-10 22:30:35,348 INFO L226 Difference]: Without dead ends: 1420 [2021-03-10 22:30:35,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 849.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-03-10 22:30:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1188. [2021-03-10 22:30:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.481044650379107) internal successors, (2945), 1187 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 2945 transitions. [2021-03-10 22:30:35,360 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 2945 transitions. Word has length 30 [2021-03-10 22:30:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:35,360 INFO L480 AbstractCegarLoop]: Abstraction has 1188 states and 2945 transitions. [2021-03-10 22:30:35,360 INFO L481 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) [2021-03-10 22:30:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 2945 transitions. [2021-03-10 22:30:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:35,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:35,361 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:35,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-03-10 22:30:35,563 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:35,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 96 times [2021-03-10 22:30:35,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:35,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797338814] [2021-03-10 22:30:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:35,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797338814] [2021-03-10 22:30:35,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622161551] [2021-03-10 22:30:35,722 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 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 [2021-03-10 22:30:35,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:30:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:36,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:36,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254919981] [2021-03-10 22:30:36,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:36,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:36,058 INFO L87 Difference]: Start difference. First operand 1188 states and 2945 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) [2021-03-10 22:30:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:36,608 INFO L93 Difference]: Finished difference Result 1536 states and 3755 transitions. [2021-03-10 22:30:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:30:36,608 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 30 [2021-03-10 22:30:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:36,610 INFO L225 Difference]: With dead ends: 1536 [2021-03-10 22:30:36,610 INFO L226 Difference]: Without dead ends: 1506 [2021-03-10 22:30:36,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-03-10 22:30:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1212. [2021-03-10 22:30:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.481420313790256) internal successors, (3005), 1211 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 3005 transitions. [2021-03-10 22:30:36,622 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 3005 transitions. Word has length 30 [2021-03-10 22:30:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:36,623 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 3005 transitions. [2021-03-10 22:30:36,623 INFO L481 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) [2021-03-10 22:30:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 3005 transitions. [2021-03-10 22:30:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:36,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:36,624 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:36,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:36,825 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 97 times [2021-03-10 22:30:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992386342] [2021-03-10 22:30:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992386342] [2021-03-10 22:30:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760072689] [2021-03-10 22:30:36,945 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 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 [2021-03-10 22:30:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:37,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:37,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:37,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774219776] [2021-03-10 22:30:37,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:37,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:37,232 INFO L87 Difference]: Start difference. First operand 1212 states and 3005 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) [2021-03-10 22:30:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:37,879 INFO L93 Difference]: Finished difference Result 1426 states and 3520 transitions. [2021-03-10 22:30:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:30:37,880 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 30 [2021-03-10 22:30:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:37,881 INFO L225 Difference]: With dead ends: 1426 [2021-03-10 22:30:37,881 INFO L226 Difference]: Without dead ends: 1396 [2021-03-10 22:30:37,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:30:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-03-10 22:30:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1212. [2021-03-10 22:30:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.481420313790256) internal successors, (3005), 1211 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 3005 transitions. [2021-03-10 22:30:37,894 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 3005 transitions. Word has length 30 [2021-03-10 22:30:37,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:37,894 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 3005 transitions. [2021-03-10 22:30:37,894 INFO L481 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) [2021-03-10 22:30:37,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 3005 transitions. [2021-03-10 22:30:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:37,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:37,895 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:38,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1145 [2021-03-10 22:30:38,096 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1535515836, now seen corresponding path program 98 times [2021-03-10 22:30:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:38,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443415391] [2021-03-10 22:30:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:38,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443415391] [2021-03-10 22:30:38,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732243978] [2021-03-10 22:30:38,251 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 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 [2021-03-10 22:30:38,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:38,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:38,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:38,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:38,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443412095] [2021-03-10 22:30:38,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:38,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:38,651 INFO L87 Difference]: Start difference. First operand 1212 states and 3005 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) [2021-03-10 22:30:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:39,210 INFO L93 Difference]: Finished difference Result 1498 states and 3700 transitions. [2021-03-10 22:30:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:39,210 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 30 [2021-03-10 22:30:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:39,212 INFO L225 Difference]: With dead ends: 1498 [2021-03-10 22:30:39,212 INFO L226 Difference]: Without dead ends: 1468 [2021-03-10 22:30:39,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 795.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-03-10 22:30:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1236. [2021-03-10 22:30:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.4817813765182186) internal successors, (3065), 1235 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3065 transitions. [2021-03-10 22:30:39,224 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3065 transitions. Word has length 30 [2021-03-10 22:30:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:39,224 INFO L480 AbstractCegarLoop]: Abstraction has 1236 states and 3065 transitions. [2021-03-10 22:30:39,224 INFO L481 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) [2021-03-10 22:30:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3065 transitions. [2021-03-10 22:30:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:39,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:39,225 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:39,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-03-10 22:30:39,426 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1385267396, now seen corresponding path program 99 times [2021-03-10 22:30:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:39,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685640238] [2021-03-10 22:30:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:39,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685640238] [2021-03-10 22:30:39,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060785753] [2021-03-10 22:30:39,555 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 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 [2021-03-10 22:30:39,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:30:39,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:39,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:39,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:39,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155323173] [2021-03-10 22:30:39,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:39,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:39,983 INFO L87 Difference]: Start difference. First operand 1236 states and 3065 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) [2021-03-10 22:30:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:40,573 INFO L93 Difference]: Finished difference Result 1522 states and 3760 transitions. [2021-03-10 22:30:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:40,573 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 30 [2021-03-10 22:30:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:40,575 INFO L225 Difference]: With dead ends: 1522 [2021-03-10 22:30:40,575 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 22:30:40,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 828.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 22:30:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1260. [2021-03-10 22:30:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.4821286735504366) internal successors, (3125), 1259 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3125 transitions. [2021-03-10 22:30:40,587 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3125 transitions. Word has length 30 [2021-03-10 22:30:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:40,588 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 3125 transitions. [2021-03-10 22:30:40,588 INFO L481 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) [2021-03-10 22:30:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3125 transitions. [2021-03-10 22:30:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:40,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:40,589 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:40,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:40,790 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:40,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:40,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1416606080, now seen corresponding path program 100 times [2021-03-10 22:30:40,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:40,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810128167] [2021-03-10 22:30:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:40,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810128167] [2021-03-10 22:30:40,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247743911] [2021-03-10 22:30:40,952 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:30:40,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:40,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:41,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:41,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:41,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152471842] [2021-03-10 22:30:41,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:41,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:41,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:41,313 INFO L87 Difference]: Start difference. First operand 1260 states and 3125 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) [2021-03-10 22:30:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:41,838 INFO L93 Difference]: Finished difference Result 1450 states and 3580 transitions. [2021-03-10 22:30:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:30:41,838 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 30 [2021-03-10 22:30:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:41,840 INFO L225 Difference]: With dead ends: 1450 [2021-03-10 22:30:41,840 INFO L226 Difference]: Without dead ends: 1420 [2021-03-10 22:30:41,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-03-10 22:30:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1268. [2021-03-10 22:30:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 2.4822415153906867) internal successors, (3145), 1267 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3145 transitions. [2021-03-10 22:30:41,852 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3145 transitions. Word has length 30 [2021-03-10 22:30:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:41,852 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 3145 transitions. [2021-03-10 22:30:41,852 INFO L481 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) [2021-03-10 22:30:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3145 transitions. [2021-03-10 22:30:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:41,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:41,854 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:42,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1199,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:42,054 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 101 times [2021-03-10 22:30:42,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:42,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771640821] [2021-03-10 22:30:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771640821] [2021-03-10 22:30:42,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986550135] [2021-03-10 22:30:42,202 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 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 [2021-03-10 22:30:42,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:30:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344711579] [2021-03-10 22:30:42,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:42,577 INFO L87 Difference]: Start difference. First operand 1268 states and 3145 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) [2021-03-10 22:30:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:43,168 INFO L93 Difference]: Finished difference Result 1578 states and 3896 transitions. [2021-03-10 22:30:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:43,169 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 30 [2021-03-10 22:30:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:43,171 INFO L225 Difference]: With dead ends: 1578 [2021-03-10 22:30:43,171 INFO L226 Difference]: Without dead ends: 1540 [2021-03-10 22:30:43,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-03-10 22:30:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1268. [2021-03-10 22:30:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 2.4822415153906867) internal successors, (3145), 1267 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3145 transitions. [2021-03-10 22:30:43,185 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3145 transitions. Word has length 30 [2021-03-10 22:30:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:43,185 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 3145 transitions. [2021-03-10 22:30:43,185 INFO L481 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) [2021-03-10 22:30:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3145 transitions. [2021-03-10 22:30:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:43,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:43,186 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:43,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-03-10 22:30:43,387 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:43,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:43,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1959804484, now seen corresponding path program 102 times [2021-03-10 22:30:43,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:43,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072562381] [2021-03-10 22:30:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072562381] [2021-03-10 22:30:43,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625773823] [2021-03-10 22:30:43,557 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 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 [2021-03-10 22:30:43,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:30:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:43,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:43,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:43,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522419844] [2021-03-10 22:30:43,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:43,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:43,851 INFO L87 Difference]: Start difference. First operand 1268 states and 3145 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) [2021-03-10 22:30:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:44,462 INFO L93 Difference]: Finished difference Result 1588 states and 3867 transitions. [2021-03-10 22:30:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:30:44,462 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 30 [2021-03-10 22:30:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:44,464 INFO L225 Difference]: With dead ends: 1588 [2021-03-10 22:30:44,464 INFO L226 Difference]: Without dead ends: 1530 [2021-03-10 22:30:44,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-03-10 22:30:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1340. [2021-03-10 22:30:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.48319641523525) internal successors, (3325), 1339 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3325 transitions. [2021-03-10 22:30:44,477 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3325 transitions. Word has length 30 [2021-03-10 22:30:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:44,477 INFO L480 AbstractCegarLoop]: Abstraction has 1340 states and 3325 transitions. [2021-03-10 22:30:44,478 INFO L481 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) [2021-03-10 22:30:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3325 transitions. [2021-03-10 22:30:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:44,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:44,479 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:44,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1236,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:44,695 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:44,696 INFO L82 PathProgramCache]: Analyzing trace with hash -700666120, now seen corresponding path program 103 times [2021-03-10 22:30:44,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:44,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195910270] [2021-03-10 22:30:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:44,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195910270] [2021-03-10 22:30:44,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229649298] [2021-03-10 22:30:44,845 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 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 [2021-03-10 22:30:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:45,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:45,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:45,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131914761] [2021-03-10 22:30:45,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:45,150 INFO L87 Difference]: Start difference. First operand 1340 states and 3325 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) [2021-03-10 22:30:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:45,750 INFO L93 Difference]: Finished difference Result 1522 states and 3760 transitions. [2021-03-10 22:30:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:45,750 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 30 [2021-03-10 22:30:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:45,752 INFO L225 Difference]: With dead ends: 1522 [2021-03-10 22:30:45,752 INFO L226 Difference]: Without dead ends: 1484 [2021-03-10 22:30:45,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 694.3ms TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:30:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-03-10 22:30:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1340. [2021-03-10 22:30:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.48319641523525) internal successors, (3325), 1339 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3325 transitions. [2021-03-10 22:30:45,764 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3325 transitions. Word has length 30 [2021-03-10 22:30:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 1340 states and 3325 transitions. [2021-03-10 22:30:45,765 INFO L481 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) [2021-03-10 22:30:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3325 transitions. [2021-03-10 22:30:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:45,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:45,766 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:45,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1253 [2021-03-10 22:30:45,967 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash -512975820, now seen corresponding path program 104 times [2021-03-10 22:30:45,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:45,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601651855] [2021-03-10 22:30:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:46,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601651855] [2021-03-10 22:30:46,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310861249] [2021-03-10 22:30:46,130 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 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 [2021-03-10 22:30:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:46,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:46,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:46,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:46,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137914101] [2021-03-10 22:30:46,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:46,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:46,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:46,476 INFO L87 Difference]: Start difference. First operand 1340 states and 3325 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) [2021-03-10 22:30:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:47,446 INFO L93 Difference]: Finished difference Result 1730 states and 4240 transitions. [2021-03-10 22:30:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:30:47,447 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 30 [2021-03-10 22:30:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:47,449 INFO L225 Difference]: With dead ends: 1730 [2021-03-10 22:30:47,449 INFO L226 Difference]: Without dead ends: 1700 [2021-03-10 22:30:47,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1152.1ms TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:30:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-03-10 22:30:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1388. [2021-03-10 22:30:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.483777937995674) internal successors, (3445), 1387 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3445 transitions. [2021-03-10 22:30:47,463 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3445 transitions. Word has length 30 [2021-03-10 22:30:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:47,463 INFO L480 AbstractCegarLoop]: Abstraction has 1388 states and 3445 transitions. [2021-03-10 22:30:47,463 INFO L481 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) [2021-03-10 22:30:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3445 transitions. [2021-03-10 22:30:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:47,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:47,464 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:47,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-03-10 22:30:47,665 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1298402944, now seen corresponding path program 105 times [2021-03-10 22:30:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:47,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096587551] [2021-03-10 22:30:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:47,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096587551] [2021-03-10 22:30:47,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146856457] [2021-03-10 22:30:47,764 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 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 [2021-03-10 22:30:47,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:30:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184571586] [2021-03-10 22:30:48,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:48,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:48,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:48,068 INFO L87 Difference]: Start difference. First operand 1388 states and 3445 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) [2021-03-10 22:30:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:48,507 INFO L93 Difference]: Finished difference Result 1554 states and 3840 transitions. [2021-03-10 22:30:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:48,508 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 30 [2021-03-10 22:30:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:48,509 INFO L225 Difference]: With dead ends: 1554 [2021-03-10 22:30:48,509 INFO L226 Difference]: Without dead ends: 1524 [2021-03-10 22:30:48,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-03-10 22:30:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1396. [2021-03-10 22:30:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.4838709677419355) internal successors, (3465), 1395 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 3465 transitions. [2021-03-10 22:30:48,524 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 3465 transitions. Word has length 30 [2021-03-10 22:30:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:48,524 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 3465 transitions. [2021-03-10 22:30:48,524 INFO L481 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) [2021-03-10 22:30:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 3465 transitions. [2021-03-10 22:30:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:48,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:48,525 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:48,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-03-10 22:30:48,727 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 106 times [2021-03-10 22:30:48,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:48,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570671004] [2021-03-10 22:30:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570671004] [2021-03-10 22:30:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396119966] [2021-03-10 22:30:48,869 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 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 [2021-03-10 22:30:48,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:48,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:49,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:49,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:49,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597312544] [2021-03-10 22:30:49,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:49,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:49,178 INFO L87 Difference]: Start difference. First operand 1396 states and 3465 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) [2021-03-10 22:30:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:49,657 INFO L93 Difference]: Finished difference Result 1626 states and 4020 transitions. [2021-03-10 22:30:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:49,657 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 30 [2021-03-10 22:30:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:49,659 INFO L225 Difference]: With dead ends: 1626 [2021-03-10 22:30:49,659 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 22:30:49,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:30:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 22:30:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1404. [2021-03-10 22:30:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.4839629365645046) internal successors, (3485), 1403 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3485 transitions. [2021-03-10 22:30:49,673 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3485 transitions. Word has length 30 [2021-03-10 22:30:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:49,673 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 3485 transitions. [2021-03-10 22:30:49,673 INFO L481 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) [2021-03-10 22:30:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3485 transitions. [2021-03-10 22:30:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:49,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:49,675 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:49,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:49,876 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 107 times [2021-03-10 22:30:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:49,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700694643] [2021-03-10 22:30:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:50,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700694643] [2021-03-10 22:30:50,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914174075] [2021-03-10 22:30:50,005 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 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 [2021-03-10 22:30:50,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:30:50,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:50,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:50,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:50,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:50,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702351350] [2021-03-10 22:30:50,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:50,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:50,375 INFO L87 Difference]: Start difference. First operand 1404 states and 3485 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) [2021-03-10 22:30:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:50,922 INFO L93 Difference]: Finished difference Result 1704 states and 4175 transitions. [2021-03-10 22:30:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:30:50,922 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 30 [2021-03-10 22:30:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:50,924 INFO L225 Difference]: With dead ends: 1704 [2021-03-10 22:30:50,924 INFO L226 Difference]: Without dead ends: 1674 [2021-03-10 22:30:50,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:50,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-03-10 22:30:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1428. [2021-03-10 22:30:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.4842326559215135) internal successors, (3545), 1427 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3545 transitions. [2021-03-10 22:30:50,938 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3545 transitions. Word has length 30 [2021-03-10 22:30:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:50,938 INFO L480 AbstractCegarLoop]: Abstraction has 1428 states and 3545 transitions. [2021-03-10 22:30:50,938 INFO L481 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) [2021-03-10 22:30:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3545 transitions. [2021-03-10 22:30:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:50,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:50,940 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:51,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1315 [2021-03-10 22:30:51,140 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 941817276, now seen corresponding path program 108 times [2021-03-10 22:30:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:51,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972443072] [2021-03-10 22:30:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972443072] [2021-03-10 22:30:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907751969] [2021-03-10 22:30:51,259 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 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 [2021-03-10 22:30:51,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:30:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:51,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:51,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:51,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219071753] [2021-03-10 22:30:51,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:51,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:51,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:51,583 INFO L87 Difference]: Start difference. First operand 1428 states and 3545 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) [2021-03-10 22:30:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:52,168 INFO L93 Difference]: Finished difference Result 1554 states and 3844 transitions. [2021-03-10 22:30:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:52,168 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 30 [2021-03-10 22:30:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:52,170 INFO L225 Difference]: With dead ends: 1554 [2021-03-10 22:30:52,170 INFO L226 Difference]: Without dead ends: 1524 [2021-03-10 22:30:52,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 680.6ms TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:30:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-03-10 22:30:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1444. [2021-03-10 22:30:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.4844074844074844) internal successors, (3585), 1443 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 3585 transitions. [2021-03-10 22:30:52,184 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 3585 transitions. Word has length 30 [2021-03-10 22:30:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:52,184 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 3585 transitions. [2021-03-10 22:30:52,184 INFO L481 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) [2021-03-10 22:30:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 3585 transitions. [2021-03-10 22:30:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:52,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:52,185 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:52,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:52,386 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 109 times [2021-03-10 22:30:52,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:52,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998581631] [2021-03-10 22:30:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:52,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998581631] [2021-03-10 22:30:52,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653388250] [2021-03-10 22:30:52,508 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 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 [2021-03-10 22:30:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:52,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:52,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456401860] [2021-03-10 22:30:52,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:52,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:52,922 INFO L87 Difference]: Start difference. First operand 1444 states and 3585 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) [2021-03-10 22:30:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:53,495 INFO L93 Difference]: Finished difference Result 1642 states and 4060 transitions. [2021-03-10 22:30:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:53,496 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 30 [2021-03-10 22:30:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:53,497 INFO L225 Difference]: With dead ends: 1642 [2021-03-10 22:30:53,498 INFO L226 Difference]: Without dead ends: 1612 [2021-03-10 22:30:53,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:30:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-03-10 22:30:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1428. [2021-03-10 22:30:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.4842326559215135) internal successors, (3545), 1427 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3545 transitions. [2021-03-10 22:30:53,511 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3545 transitions. Word has length 30 [2021-03-10 22:30:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:53,511 INFO L480 AbstractCegarLoop]: Abstraction has 1428 states and 3545 transitions. [2021-03-10 22:30:53,511 INFO L481 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) [2021-03-10 22:30:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3545 transitions. [2021-03-10 22:30:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:53,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:53,513 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:53,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:53,713 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash -731840580, now seen corresponding path program 110 times [2021-03-10 22:30:53,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:53,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324520534] [2021-03-10 22:30:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:53,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324520534] [2021-03-10 22:30:53,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870580603] [2021-03-10 22:30:53,826 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 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 [2021-03-10 22:30:53,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:30:53,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:53,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:54,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:54,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105129660] [2021-03-10 22:30:54,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:54,151 INFO L87 Difference]: Start difference. First operand 1428 states and 3545 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) [2021-03-10 22:30:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:54,833 INFO L93 Difference]: Finished difference Result 2046 states and 5012 transitions. [2021-03-10 22:30:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:30:54,833 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 30 [2021-03-10 22:30:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:54,835 INFO L225 Difference]: With dead ends: 2046 [2021-03-10 22:30:54,835 INFO L226 Difference]: Without dead ends: 1988 [2021-03-10 22:30:54,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:30:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-03-10 22:30:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1516. [2021-03-10 22:30:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 2.485148514851485) internal successors, (3765), 1515 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 3765 transitions. [2021-03-10 22:30:54,850 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 3765 transitions. Word has length 30 [2021-03-10 22:30:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:54,850 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 3765 transitions. [2021-03-10 22:30:54,850 INFO L481 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) [2021-03-10 22:30:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 3765 transitions. [2021-03-10 22:30:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:54,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:54,852 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:55,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1368,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:55,052 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 830033784, now seen corresponding path program 111 times [2021-03-10 22:30:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:55,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103634415] [2021-03-10 22:30:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103634415] [2021-03-10 22:30:55,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284914550] [2021-03-10 22:30:55,196 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 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 [2021-03-10 22:30:55,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:30:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:55,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:55,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818700475] [2021-03-10 22:30:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:55,583 INFO L87 Difference]: Start difference. First operand 1516 states and 3765 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) [2021-03-10 22:30:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:56,182 INFO L93 Difference]: Finished difference Result 1842 states and 4560 transitions. [2021-03-10 22:30:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:30:56,182 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 30 [2021-03-10 22:30:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:56,184 INFO L225 Difference]: With dead ends: 1842 [2021-03-10 22:30:56,184 INFO L226 Difference]: Without dead ends: 1812 [2021-03-10 22:30:56,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 829.6ms TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:30:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-03-10 22:30:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1524. [2021-03-10 22:30:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.485226526592252) internal successors, (3785), 1523 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3785 transitions. [2021-03-10 22:30:56,202 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3785 transitions. Word has length 30 [2021-03-10 22:30:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:56,202 INFO L480 AbstractCegarLoop]: Abstraction has 1524 states and 3785 transitions. [2021-03-10 22:30:56,202 INFO L481 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) [2021-03-10 22:30:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3785 transitions. [2021-03-10 22:30:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:56,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:56,204 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:56,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1382,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:56,415 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1429007880, now seen corresponding path program 112 times [2021-03-10 22:30:56,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:56,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452973149] [2021-03-10 22:30:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452973149] [2021-03-10 22:30:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446464381] [2021-03-10 22:30:56,559 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 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 [2021-03-10 22:30:56,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:30:56,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:56,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:56,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:56,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292100] [2021-03-10 22:30:56,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:56,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:56,868 INFO L87 Difference]: Start difference. First operand 1524 states and 3785 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) [2021-03-10 22:30:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:57,397 INFO L93 Difference]: Finished difference Result 1844 states and 4502 transitions. [2021-03-10 22:30:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:30:57,398 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 30 [2021-03-10 22:30:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:57,400 INFO L225 Difference]: With dead ends: 1844 [2021-03-10 22:30:57,400 INFO L226 Difference]: Without dead ends: 1806 [2021-03-10 22:30:57,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:30:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-03-10 22:30:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1548. [2021-03-10 22:30:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 2.4880413703943116) internal successors, (3849), 1547 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3849 transitions. [2021-03-10 22:30:57,416 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3849 transitions. Word has length 30 [2021-03-10 22:30:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:57,416 INFO L480 AbstractCegarLoop]: Abstraction has 1548 states and 3849 transitions. [2021-03-10 22:30:57,416 INFO L481 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) [2021-03-10 22:30:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3849 transitions. [2021-03-10 22:30:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:57,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:57,418 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:57,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-03-10 22:30:57,618 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 17820784, now seen corresponding path program 113 times [2021-03-10 22:30:57,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:57,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531980252] [2021-03-10 22:30:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:57,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531980252] [2021-03-10 22:30:57,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009262204] [2021-03-10 22:30:57,751 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 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 [2021-03-10 22:30:57,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:30:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:58,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:58,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:58,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255798012] [2021-03-10 22:30:58,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:58,046 INFO L87 Difference]: Start difference. First operand 1548 states and 3849 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) [2021-03-10 22:30:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:58,448 INFO L93 Difference]: Finished difference Result 1674 states and 4140 transitions. [2021-03-10 22:30:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:30:58,448 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 30 [2021-03-10 22:30:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:58,450 INFO L225 Difference]: With dead ends: 1674 [2021-03-10 22:30:58,450 INFO L226 Difference]: Without dead ends: 1644 [2021-03-10 22:30:58,450 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:30:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-03-10 22:30:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1540. [2021-03-10 22:30:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.4853801169590644) internal successors, (3825), 1539 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3825 transitions. [2021-03-10 22:30:58,464 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3825 transitions. Word has length 30 [2021-03-10 22:30:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:58,464 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3825 transitions. [2021-03-10 22:30:58,464 INFO L481 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) [2021-03-10 22:30:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3825 transitions. [2021-03-10 22:30:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:58,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:58,466 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:30:58,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:30:58,667 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:30:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:30:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2086236928, now seen corresponding path program 114 times [2021-03-10 22:30:58,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:30:58,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367438068] [2021-03-10 22:30:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:30:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:30:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:58,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367438068] [2021-03-10 22:30:58,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407413295] [2021-03-10 22:30:58,857 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 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 [2021-03-10 22:30:58,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:30:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:30:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:30:58,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:30:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:30:59,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:30:59,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:30:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231196483] [2021-03-10 22:30:59,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:30:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:30:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:30:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:30:59,231 INFO L87 Difference]: Start difference. First operand 1540 states and 3825 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) [2021-03-10 22:30:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:30:59,796 INFO L93 Difference]: Finished difference Result 1674 states and 4140 transitions. [2021-03-10 22:30:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:30:59,796 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 30 [2021-03-10 22:30:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:30:59,798 INFO L225 Difference]: With dead ends: 1674 [2021-03-10 22:30:59,798 INFO L226 Difference]: Without dead ends: 1644 [2021-03-10 22:30:59,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:30:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-03-10 22:30:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1532. [2021-03-10 22:30:59,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 2.4853037230568256) internal successors, (3805), 1531 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:30:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 3805 transitions. [2021-03-10 22:30:59,813 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 3805 transitions. Word has length 30 [2021-03-10 22:30:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:30:59,813 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 3805 transitions. [2021-03-10 22:30:59,813 INFO L481 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) [2021-03-10 22:30:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 3805 transitions. [2021-03-10 22:30:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:30:59,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:30:59,814 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:00,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1432,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:00,015 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:00,015 INFO L82 PathProgramCache]: Analyzing trace with hash 149528764, now seen corresponding path program 115 times [2021-03-10 22:31:00,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:00,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66325410] [2021-03-10 22:31:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:00,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66325410] [2021-03-10 22:31:00,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21483852] [2021-03-10 22:31:00,182 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 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 [2021-03-10 22:31:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:00,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:00,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:00,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:00,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651220048] [2021-03-10 22:31:00,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:00,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:00,525 INFO L87 Difference]: Start difference. First operand 1532 states and 3805 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) [2021-03-10 22:31:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:01,216 INFO L93 Difference]: Finished difference Result 1738 states and 4300 transitions. [2021-03-10 22:31:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:01,217 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 30 [2021-03-10 22:31:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:01,219 INFO L225 Difference]: With dead ends: 1738 [2021-03-10 22:31:01,219 INFO L226 Difference]: Without dead ends: 1708 [2021-03-10 22:31:01,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 910.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:31:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-03-10 22:31:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1548. [2021-03-10 22:31:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 2.4854557207498384) internal successors, (3845), 1547 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3845 transitions. [2021-03-10 22:31:01,234 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3845 transitions. Word has length 30 [2021-03-10 22:31:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:01,234 INFO L480 AbstractCegarLoop]: Abstraction has 1548 states and 3845 transitions. [2021-03-10 22:31:01,234 INFO L481 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) [2021-03-10 22:31:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3845 transitions. [2021-03-10 22:31:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:01,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:01,236 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:01,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1444 [2021-03-10 22:31:01,437 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:01,437 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 116 times [2021-03-10 22:31:01,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:01,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975865314] [2021-03-10 22:31:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975865314] [2021-03-10 22:31:01,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337092670] [2021-03-10 22:31:01,603 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 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 [2021-03-10 22:31:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:01,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:01,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370124645] [2021-03-10 22:31:01,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:01,990 INFO L87 Difference]: Start difference. First operand 1548 states and 3845 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) [2021-03-10 22:31:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:02,649 INFO L93 Difference]: Finished difference Result 1906 states and 4716 transitions. [2021-03-10 22:31:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:02,650 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 30 [2021-03-10 22:31:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:02,652 INFO L225 Difference]: With dead ends: 1906 [2021-03-10 22:31:02,652 INFO L226 Difference]: Without dead ends: 1868 [2021-03-10 22:31:02,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:31:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-03-10 22:31:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1540. [2021-03-10 22:31:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.4853801169590644) internal successors, (3825), 1539 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3825 transitions. [2021-03-10 22:31:02,671 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3825 transitions. Word has length 30 [2021-03-10 22:31:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:02,671 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3825 transitions. [2021-03-10 22:31:02,671 INFO L481 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) [2021-03-10 22:31:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3825 transitions. [2021-03-10 22:31:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:02,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:02,673 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:02,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1465,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:02,887 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1308421768, now seen corresponding path program 117 times [2021-03-10 22:31:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:02,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457119214] [2021-03-10 22:31:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:03,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457119214] [2021-03-10 22:31:03,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949090462] [2021-03-10 22:31:03,179 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 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 [2021-03-10 22:31:03,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:31:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:03,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:03,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:03,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020613461] [2021-03-10 22:31:03,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:03,548 INFO L87 Difference]: Start difference. First operand 1540 states and 3825 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) [2021-03-10 22:31:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:04,167 INFO L93 Difference]: Finished difference Result 1908 states and 4675 transitions. [2021-03-10 22:31:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:04,168 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 30 [2021-03-10 22:31:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:04,170 INFO L225 Difference]: With dead ends: 1908 [2021-03-10 22:31:04,170 INFO L226 Difference]: Without dead ends: 1866 [2021-03-10 22:31:04,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 962.5ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:31:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-03-10 22:31:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1564. [2021-03-10 22:31:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.4856046065259116) internal successors, (3885), 1563 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 3885 transitions. [2021-03-10 22:31:04,191 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 3885 transitions. Word has length 30 [2021-03-10 22:31:04,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:04,191 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 3885 transitions. [2021-03-10 22:31:04,191 INFO L481 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) [2021-03-10 22:31:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 3885 transitions. [2021-03-10 22:31:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:04,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:04,193 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:04,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-03-10 22:31:04,404 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 118 times [2021-03-10 22:31:04,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:04,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974489907] [2021-03-10 22:31:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:04,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974489907] [2021-03-10 22:31:04,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235725066] [2021-03-10 22:31:04,612 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 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 [2021-03-10 22:31:04,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:04,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:04,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759709191] [2021-03-10 22:31:04,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:04,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:04,935 INFO L87 Difference]: Start difference. First operand 1564 states and 3885 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) [2021-03-10 22:31:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:05,433 INFO L93 Difference]: Finished difference Result 1900 states and 4651 transitions. [2021-03-10 22:31:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:05,433 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 30 [2021-03-10 22:31:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:05,435 INFO L225 Difference]: With dead ends: 1900 [2021-03-10 22:31:05,435 INFO L226 Difference]: Without dead ends: 1850 [2021-03-10 22:31:05,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:31:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2021-03-10 22:31:05,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1604. [2021-03-10 22:31:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 2.4859638178415473) internal successors, (3985), 1603 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3985 transitions. [2021-03-10 22:31:05,449 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3985 transitions. Word has length 30 [2021-03-10 22:31:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:05,449 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 3985 transitions. [2021-03-10 22:31:05,449 INFO L481 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) [2021-03-10 22:31:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3985 transitions. [2021-03-10 22:31:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:05,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:05,451 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:05,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-03-10 22:31:05,660 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 917438260, now seen corresponding path program 119 times [2021-03-10 22:31:05,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:05,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652125418] [2021-03-10 22:31:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652125418] [2021-03-10 22:31:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820975603] [2021-03-10 22:31:05,850 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 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 [2021-03-10 22:31:05,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:31:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:06,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:06,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403459393] [2021-03-10 22:31:06,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:06,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:06,169 INFO L87 Difference]: Start difference. First operand 1604 states and 3985 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) [2021-03-10 22:31:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:06,641 INFO L93 Difference]: Finished difference Result 1898 states and 4704 transitions. [2021-03-10 22:31:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:06,642 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 30 [2021-03-10 22:31:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:06,644 INFO L225 Difference]: With dead ends: 1898 [2021-03-10 22:31:06,644 INFO L226 Difference]: Without dead ends: 1868 [2021-03-10 22:31:06,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-03-10 22:31:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1620. [2021-03-10 22:31:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 2.486102532427424) internal successors, (4025), 1619 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 4025 transitions. [2021-03-10 22:31:06,665 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 4025 transitions. Word has length 30 [2021-03-10 22:31:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:06,666 INFO L480 AbstractCegarLoop]: Abstraction has 1620 states and 4025 transitions. [2021-03-10 22:31:06,666 INFO L481 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) [2021-03-10 22:31:06,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 4025 transitions. [2021-03-10 22:31:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:06,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:06,667 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:06,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1515 [2021-03-10 22:31:06,882 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 120 times [2021-03-10 22:31:06,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:06,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758160115] [2021-03-10 22:31:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:06,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758160115] [2021-03-10 22:31:06,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468313885] [2021-03-10 22:31:06,990 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 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 [2021-03-10 22:31:07,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:31:07,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:07,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:07,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064189376] [2021-03-10 22:31:07,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:07,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:07,284 INFO L87 Difference]: Start difference. First operand 1620 states and 4025 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) [2021-03-10 22:31:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:07,821 INFO L93 Difference]: Finished difference Result 1866 states and 4616 transitions. [2021-03-10 22:31:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:07,821 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 30 [2021-03-10 22:31:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:07,823 INFO L225 Difference]: With dead ends: 1866 [2021-03-10 22:31:07,823 INFO L226 Difference]: Without dead ends: 1828 [2021-03-10 22:31:07,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-10 22:31:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1620. [2021-03-10 22:31:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 2.486102532427424) internal successors, (4025), 1619 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 4025 transitions. [2021-03-10 22:31:07,838 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 4025 transitions. Word has length 30 [2021-03-10 22:31:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:07,838 INFO L480 AbstractCegarLoop]: Abstraction has 1620 states and 4025 transitions. [2021-03-10 22:31:07,838 INFO L481 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) [2021-03-10 22:31:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 4025 transitions. [2021-03-10 22:31:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:07,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:07,839 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:08,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:08,055 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:08,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:08,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2075915000, now seen corresponding path program 121 times [2021-03-10 22:31:08,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:08,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155569623] [2021-03-10 22:31:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155569623] [2021-03-10 22:31:08,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052546349] [2021-03-10 22:31:08,138 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 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 [2021-03-10 22:31:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:08,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:08,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:08,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980224620] [2021-03-10 22:31:08,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:08,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:08,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:08,426 INFO L87 Difference]: Start difference. First operand 1620 states and 4025 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) [2021-03-10 22:31:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:09,061 INFO L93 Difference]: Finished difference Result 1874 states and 4636 transitions. [2021-03-10 22:31:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:31:09,062 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 30 [2021-03-10 22:31:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:09,064 INFO L225 Difference]: With dead ends: 1874 [2021-03-10 22:31:09,064 INFO L226 Difference]: Without dead ends: 1836 [2021-03-10 22:31:09,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:31:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-03-10 22:31:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1628. [2021-03-10 22:31:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.4861708666256916) internal successors, (4045), 1627 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 4045 transitions. [2021-03-10 22:31:09,080 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 4045 transitions. Word has length 30 [2021-03-10 22:31:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:09,080 INFO L480 AbstractCegarLoop]: Abstraction has 1628 states and 4045 transitions. [2021-03-10 22:31:09,080 INFO L481 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) [2021-03-10 22:31:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 4045 transitions. [2021-03-10 22:31:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:09,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:09,082 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:09,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1555 [2021-03-10 22:31:09,295 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:09,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:09,296 INFO L82 PathProgramCache]: Analyzing trace with hash 798528504, now seen corresponding path program 122 times [2021-03-10 22:31:09,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:09,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225859435] [2021-03-10 22:31:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225859435] [2021-03-10 22:31:09,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547090387] [2021-03-10 22:31:09,425 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 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 [2021-03-10 22:31:09,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:09,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:09,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:09,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:09,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592404230] [2021-03-10 22:31:09,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:09,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:09,784 INFO L87 Difference]: Start difference. First operand 1628 states and 4045 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) [2021-03-10 22:31:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:10,354 INFO L93 Difference]: Finished difference Result 1826 states and 4520 transitions. [2021-03-10 22:31:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:10,355 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 30 [2021-03-10 22:31:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:10,357 INFO L225 Difference]: With dead ends: 1826 [2021-03-10 22:31:10,357 INFO L226 Difference]: Without dead ends: 1796 [2021-03-10 22:31:10,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-03-10 22:31:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1636. [2021-03-10 22:31:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.4862385321100917) internal successors, (4065), 1635 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 4065 transitions. [2021-03-10 22:31:10,372 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 4065 transitions. Word has length 30 [2021-03-10 22:31:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:10,372 INFO L480 AbstractCegarLoop]: Abstraction has 1636 states and 4065 transitions. [2021-03-10 22:31:10,372 INFO L481 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) [2021-03-10 22:31:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 4065 transitions. [2021-03-10 22:31:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:10,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:10,373 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:10,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1567 [2021-03-10 22:31:10,574 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2057666868, now seen corresponding path program 123 times [2021-03-10 22:31:10,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:10,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226089977] [2021-03-10 22:31:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:10,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226089977] [2021-03-10 22:31:10,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942154400] [2021-03-10 22:31:10,703 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 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 [2021-03-10 22:31:10,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:31:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:10,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:10,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36619434] [2021-03-10 22:31:10,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:10,990 INFO L87 Difference]: Start difference. First operand 1636 states and 4065 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) [2021-03-10 22:31:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:11,373 INFO L93 Difference]: Finished difference Result 1842 states and 4560 transitions. [2021-03-10 22:31:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:31:11,373 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 30 [2021-03-10 22:31:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:11,376 INFO L225 Difference]: With dead ends: 1842 [2021-03-10 22:31:11,376 INFO L226 Difference]: Without dead ends: 1812 [2021-03-10 22:31:11,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:31:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-03-10 22:31:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1644. [2021-03-10 22:31:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.4863055386488133) internal successors, (4085), 1643 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4085 transitions. [2021-03-10 22:31:11,390 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4085 transitions. Word has length 30 [2021-03-10 22:31:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:11,391 INFO L480 AbstractCegarLoop]: Abstraction has 1644 states and 4085 transitions. [2021-03-10 22:31:11,391 INFO L481 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) [2021-03-10 22:31:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4085 transitions. [2021-03-10 22:31:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:31:11,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:11,392 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:11,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:11,593 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 124 times [2021-03-10 22:31:11,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:11,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92375832] [2021-03-10 22:31:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:11,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92375832] [2021-03-10 22:31:11,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685491786] [2021-03-10 22:31:11,715 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 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 [2021-03-10 22:31:11,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:11,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 22:31:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:12,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:12,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:31:12,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307542709] [2021-03-10 22:31:12,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:31:12,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:31:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:31:12,031 INFO L87 Difference]: Start difference. First operand 1644 states and 4085 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) [2021-03-10 22:31:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:12,637 INFO L93 Difference]: Finished difference Result 2070 states and 5080 transitions. [2021-03-10 22:31:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:31:12,637 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 30 [2021-03-10 22:31:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:12,639 INFO L225 Difference]: With dead ends: 2070 [2021-03-10 22:31:12,639 INFO L226 Difference]: Without dead ends: 2028 [2021-03-10 22:31:12,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 775.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:31:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-03-10 22:31:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1692. [2021-03-10 22:31:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 2.4866942637492606) internal successors, (4205), 1691 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 4205 transitions. [2021-03-10 22:31:12,654 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 4205 transitions. Word has length 30 [2021-03-10 22:31:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:12,654 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 4205 transitions. [2021-03-10 22:31:12,654 INFO L481 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) [2021-03-10 22:31:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 4205 transitions. [2021-03-10 22:31:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:12,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:12,656 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:12,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:12,856 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash -236454266, now seen corresponding path program 125 times [2021-03-10 22:31:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:12,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284126972] [2021-03-10 22:31:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284126972] [2021-03-10 22:31:13,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884823247] [2021-03-10 22:31:13,069 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 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 [2021-03-10 22:31:13,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:31:13,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:13,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:13,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923203257] [2021-03-10 22:31:13,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:13,435 INFO L87 Difference]: Start difference. First operand 1692 states and 4205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:13,948 INFO L93 Difference]: Finished difference Result 1834 states and 4540 transitions. [2021-03-10 22:31:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:31:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:13,951 INFO L225 Difference]: With dead ends: 1834 [2021-03-10 22:31:13,951 INFO L226 Difference]: Without dead ends: 1804 [2021-03-10 22:31:13,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 804.2ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:31:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-03-10 22:31:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1692. [2021-03-10 22:31:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 2.4866942637492606) internal successors, (4205), 1691 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 4205 transitions. [2021-03-10 22:31:13,975 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 4205 transitions. Word has length 32 [2021-03-10 22:31:13,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:13,975 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 4205 transitions. [2021-03-10 22:31:13,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 4205 transitions. [2021-03-10 22:31:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:13,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:13,977 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:14,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1611 [2021-03-10 22:31:14,193 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 574017866, now seen corresponding path program 126 times [2021-03-10 22:31:14,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:14,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637556466] [2021-03-10 22:31:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637556466] [2021-03-10 22:31:14,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548745711] [2021-03-10 22:31:14,368 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 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 [2021-03-10 22:31:14,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:31:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:14,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:14,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:14,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6291437] [2021-03-10 22:31:14,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:14,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:14,705 INFO L87 Difference]: Start difference. First operand 1692 states and 4205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:15,312 INFO L93 Difference]: Finished difference Result 1866 states and 4616 transitions. [2021-03-10 22:31:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:15,314 INFO L225 Difference]: With dead ends: 1866 [2021-03-10 22:31:15,314 INFO L226 Difference]: Without dead ends: 1828 [2021-03-10 22:31:15,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:31:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-10 22:31:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1700. [2021-03-10 22:31:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-03-10 22:31:15,330 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-03-10 22:31:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:15,330 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-03-10 22:31:15,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-03-10 22:31:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:15,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:15,332 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:15,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1626 [2021-03-10 22:31:15,532 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 127 times [2021-03-10 22:31:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:15,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613420013] [2021-03-10 22:31:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:15,899 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-03-10 22:31:16,094 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-03-10 22:31:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:16,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613420013] [2021-03-10 22:31:16,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187421589] [2021-03-10 22:31:16,241 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 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 [2021-03-10 22:31:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:16,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:16,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119141771] [2021-03-10 22:31:16,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:16,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:16,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:16,639 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:17,308 INFO L93 Difference]: Finished difference Result 1914 states and 4740 transitions. [2021-03-10 22:31:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:17,310 INFO L225 Difference]: With dead ends: 1914 [2021-03-10 22:31:17,310 INFO L226 Difference]: Without dead ends: 1884 [2021-03-10 22:31:17,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-03-10 22:31:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1700. [2021-03-10 22:31:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-03-10 22:31:17,325 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-03-10 22:31:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:17,325 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-03-10 22:31:17,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-03-10 22:31:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:17,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:17,327 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:17,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1640 [2021-03-10 22:31:17,543 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:17,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 128 times [2021-03-10 22:31:17,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:17,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370569441] [2021-03-10 22:31:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:17,748 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2021-03-10 22:31:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370569441] [2021-03-10 22:31:18,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005435443] [2021-03-10 22:31:18,009 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 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 [2021-03-10 22:31:18,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:18,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:18,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:18,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:18,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:18,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112731391] [2021-03-10 22:31:18,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:18,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:18,405 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:19,229 INFO L93 Difference]: Finished difference Result 1922 states and 4760 transitions. [2021-03-10 22:31:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:31:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:19,232 INFO L225 Difference]: With dead ends: 1922 [2021-03-10 22:31:19,232 INFO L226 Difference]: Without dead ends: 1892 [2021-03-10 22:31:19,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1121.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:31:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-03-10 22:31:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1708. [2021-03-10 22:31:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.4868189806678385) internal successors, (4245), 1707 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4245 transitions. [2021-03-10 22:31:19,248 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4245 transitions. Word has length 32 [2021-03-10 22:31:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:19,248 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 4245 transitions. [2021-03-10 22:31:19,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4245 transitions. [2021-03-10 22:31:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:19,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:19,250 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:19,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1653,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:19,450 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1971157630, now seen corresponding path program 129 times [2021-03-10 22:31:19,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:19,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27221928] [2021-03-10 22:31:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:19,615 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2021-03-10 22:31:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27221928] [2021-03-10 22:31:20,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963697990] [2021-03-10 22:31:20,031 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 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 [2021-03-10 22:31:20,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:31:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:20,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:20,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:20,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115216493] [2021-03-10 22:31:20,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:20,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:20,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:20,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:20,433 INFO L87 Difference]: Start difference. First operand 1708 states and 4245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:20,948 INFO L93 Difference]: Finished difference Result 1810 states and 4484 transitions. [2021-03-10 22:31:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:20,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:20,950 INFO L225 Difference]: With dead ends: 1810 [2021-03-10 22:31:20,950 INFO L226 Difference]: Without dead ends: 1788 [2021-03-10 22:31:20,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:31:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-03-10 22:31:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1700. [2021-03-10 22:31:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-03-10 22:31:20,966 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-03-10 22:31:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:20,966 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-03-10 22:31:20,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-03-10 22:31:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:20,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:20,967 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:21,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-03-10 22:31:21,168 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 130 times [2021-03-10 22:31:21,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:21,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672006141] [2021-03-10 22:31:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672006141] [2021-03-10 22:31:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411760519] [2021-03-10 22:31:21,456 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 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 [2021-03-10 22:31:21,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:21,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:21,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:21,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:21,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228260724] [2021-03-10 22:31:21,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:21,832 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:22,323 INFO L93 Difference]: Finished difference Result 1818 states and 4500 transitions. [2021-03-10 22:31:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:22,325 INFO L225 Difference]: With dead ends: 1818 [2021-03-10 22:31:22,325 INFO L226 Difference]: Without dead ends: 1788 [2021-03-10 22:31:22,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-03-10 22:31:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1716. [2021-03-10 22:31:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.486880466472303) internal successors, (4265), 1715 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4265 transitions. [2021-03-10 22:31:22,340 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4265 transitions. Word has length 32 [2021-03-10 22:31:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:22,340 INFO L480 AbstractCegarLoop]: Abstraction has 1716 states and 4265 transitions. [2021-03-10 22:31:22,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4265 transitions. [2021-03-10 22:31:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:22,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:22,342 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:22,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-03-10 22:31:22,542 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 131 times [2021-03-10 22:31:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:22,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537671467] [2021-03-10 22:31:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:22,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537671467] [2021-03-10 22:31:22,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997868305] [2021-03-10 22:31:22,902 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 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 [2021-03-10 22:31:22,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:31:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:23,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:23,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083427262] [2021-03-10 22:31:23,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:23,259 INFO L87 Difference]: Start difference. First operand 1716 states and 4265 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:23,914 INFO L93 Difference]: Finished difference Result 2058 states and 5100 transitions. [2021-03-10 22:31:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:31:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:23,917 INFO L225 Difference]: With dead ends: 2058 [2021-03-10 22:31:23,917 INFO L226 Difference]: Without dead ends: 2020 [2021-03-10 22:31:23,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:31:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-03-10 22:31:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1724. [2021-03-10 22:31:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.4869413813116656) internal successors, (4285), 1723 states have internal predecessors, (4285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4285 transitions. [2021-03-10 22:31:23,935 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4285 transitions. Word has length 32 [2021-03-10 22:31:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:23,935 INFO L480 AbstractCegarLoop]: Abstraction has 1724 states and 4285 transitions. [2021-03-10 22:31:23,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4285 transitions. [2021-03-10 22:31:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:23,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:23,937 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:24,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:24,137 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 132 times [2021-03-10 22:31:24,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:24,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971975598] [2021-03-10 22:31:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971975598] [2021-03-10 22:31:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940129264] [2021-03-10 22:31:24,487 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 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 [2021-03-10 22:31:24,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:31:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:24,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:24,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:24,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909800044] [2021-03-10 22:31:24,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:24,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:24,907 INFO L87 Difference]: Start difference. First operand 1724 states and 4285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:25,612 INFO L93 Difference]: Finished difference Result 1970 states and 4880 transitions. [2021-03-10 22:31:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:25,615 INFO L225 Difference]: With dead ends: 1970 [2021-03-10 22:31:25,615 INFO L226 Difference]: Without dead ends: 1940 [2021-03-10 22:31:25,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1125.7ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-03-10 22:31:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1732. [2021-03-10 22:31:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.487001733102253) internal successors, (4305), 1731 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4305 transitions. [2021-03-10 22:31:25,632 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4305 transitions. Word has length 32 [2021-03-10 22:31:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:25,632 INFO L480 AbstractCegarLoop]: Abstraction has 1732 states and 4305 transitions. [2021-03-10 22:31:25,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4305 transitions. [2021-03-10 22:31:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:25,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:25,634 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:25,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1724,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:25,834 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 133 times [2021-03-10 22:31:25,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:25,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227178371] [2021-03-10 22:31:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:26,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227178371] [2021-03-10 22:31:26,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350420414] [2021-03-10 22:31:26,065 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:31:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:26,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:26,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:26,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049216221] [2021-03-10 22:31:26,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:26,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:26,567 INFO L87 Difference]: Start difference. First operand 1732 states and 4305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:27,118 INFO L93 Difference]: Finished difference Result 1938 states and 4804 transitions. [2021-03-10 22:31:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:27,120 INFO L225 Difference]: With dead ends: 1938 [2021-03-10 22:31:27,120 INFO L226 Difference]: Without dead ends: 1916 [2021-03-10 22:31:27,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-03-10 22:31:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1732. [2021-03-10 22:31:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.487001733102253) internal successors, (4305), 1731 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4305 transitions. [2021-03-10 22:31:27,137 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4305 transitions. Word has length 32 [2021-03-10 22:31:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:27,137 INFO L480 AbstractCegarLoop]: Abstraction has 1732 states and 4305 transitions. [2021-03-10 22:31:27,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4305 transitions. [2021-03-10 22:31:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:27,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:27,139 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:27,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:27,351 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 134 times [2021-03-10 22:31:27,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:27,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650942686] [2021-03-10 22:31:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:27,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650942686] [2021-03-10 22:31:27,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311444590] [2021-03-10 22:31:27,505 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 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 [2021-03-10 22:31:27,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:27,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:28,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:28,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:28,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428851553] [2021-03-10 22:31:28,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:28,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:28,013 INFO L87 Difference]: Start difference. First operand 1732 states and 4305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:29,016 INFO L93 Difference]: Finished difference Result 1954 states and 4840 transitions. [2021-03-10 22:31:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:31:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:29,019 INFO L225 Difference]: With dead ends: 1954 [2021-03-10 22:31:29,019 INFO L226 Difference]: Without dead ends: 1924 [2021-03-10 22:31:29,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1293.6ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:31:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-03-10 22:31:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1756. [2021-03-10 22:31:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.4871794871794872) internal successors, (4365), 1755 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4365 transitions. [2021-03-10 22:31:29,036 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4365 transitions. Word has length 32 [2021-03-10 22:31:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:29,036 INFO L480 AbstractCegarLoop]: Abstraction has 1756 states and 4365 transitions. [2021-03-10 22:31:29,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4365 transitions. [2021-03-10 22:31:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:29,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:29,037 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:29,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1762,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:29,239 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 135 times [2021-03-10 22:31:29,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:29,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358484920] [2021-03-10 22:31:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:29,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358484920] [2021-03-10 22:31:29,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670117422] [2021-03-10 22:31:29,428 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 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 [2021-03-10 22:31:29,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:31:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:29,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:29,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:29,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627326297] [2021-03-10 22:31:29,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:29,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:29,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:29,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:29,936 INFO L87 Difference]: Start difference. First operand 1756 states and 4365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:30,779 INFO L93 Difference]: Finished difference Result 1906 states and 4724 transitions. [2021-03-10 22:31:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:30,782 INFO L225 Difference]: With dead ends: 1906 [2021-03-10 22:31:30,782 INFO L226 Difference]: Without dead ends: 1884 [2021-03-10 22:31:30,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1208.1ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-03-10 22:31:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1756. [2021-03-10 22:31:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.4871794871794872) internal successors, (4365), 1755 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4365 transitions. [2021-03-10 22:31:30,799 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4365 transitions. Word has length 32 [2021-03-10 22:31:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:30,799 INFO L480 AbstractCegarLoop]: Abstraction has 1756 states and 4365 transitions. [2021-03-10 22:31:30,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4365 transitions. [2021-03-10 22:31:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:30,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:30,801 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:31,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-03-10 22:31:31,001 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:31,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1592943234, now seen corresponding path program 136 times [2021-03-10 22:31:31,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:31,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407915892] [2021-03-10 22:31:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407915892] [2021-03-10 22:31:31,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4471216] [2021-03-10 22:31:31,166 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 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 [2021-03-10 22:31:31,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:31,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:31,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:31,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428501807] [2021-03-10 22:31:31,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:31,589 INFO L87 Difference]: Start difference. First operand 1756 states and 4365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:32,215 INFO L93 Difference]: Finished difference Result 1938 states and 4796 transitions. [2021-03-10 22:31:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:32,218 INFO L225 Difference]: With dead ends: 1938 [2021-03-10 22:31:32,218 INFO L226 Difference]: Without dead ends: 1900 [2021-03-10 22:31:32,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 887.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-03-10 22:31:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1780. [2021-03-10 22:31:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.4873524451939293) internal successors, (4425), 1779 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4425 transitions. [2021-03-10 22:31:32,236 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4425 transitions. Word has length 32 [2021-03-10 22:31:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:32,236 INFO L480 AbstractCegarLoop]: Abstraction has 1780 states and 4425 transitions. [2021-03-10 22:31:32,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4425 transitions. [2021-03-10 22:31:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:32,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:32,237 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:32,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-03-10 22:31:32,438 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:32,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 137 times [2021-03-10 22:31:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:32,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989639373] [2021-03-10 22:31:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989639373] [2021-03-10 22:31:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860916809] [2021-03-10 22:31:32,628 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 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 [2021-03-10 22:31:32,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:31:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:33,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:33,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:33,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278628629] [2021-03-10 22:31:33,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:33,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:33,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:33,110 INFO L87 Difference]: Start difference. First operand 1780 states and 4425 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:33,924 INFO L93 Difference]: Finished difference Result 2002 states and 4952 transitions. [2021-03-10 22:31:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:31:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:33,927 INFO L225 Difference]: With dead ends: 2002 [2021-03-10 22:31:33,927 INFO L226 Difference]: Without dead ends: 1956 [2021-03-10 22:31:33,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1154.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:31:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-03-10 22:31:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1788. [2021-03-10 22:31:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.4874090654728596) internal successors, (4445), 1787 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 4445 transitions. [2021-03-10 22:31:33,943 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 4445 transitions. Word has length 32 [2021-03-10 22:31:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:33,943 INFO L480 AbstractCegarLoop]: Abstraction has 1788 states and 4445 transitions. [2021-03-10 22:31:33,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 4445 transitions. [2021-03-10 22:31:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:33,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:33,945 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:34,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:34,146 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 138 times [2021-03-10 22:31:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:34,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265623793] [2021-03-10 22:31:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:35,004 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-03-10 22:31:35,680 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-03-10 22:31:36,219 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-03-10 22:31:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265623793] [2021-03-10 22:31:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316538624] [2021-03-10 22:31:36,301 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 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 [2021-03-10 22:31:36,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:31:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:36,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:36,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:36,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376078773] [2021-03-10 22:31:36,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:36,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:36,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:36,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:36,814 INFO L87 Difference]: Start difference. First operand 1788 states and 4445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:37,710 INFO L93 Difference]: Finished difference Result 2114 states and 5240 transitions. [2021-03-10 22:31:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:37,713 INFO L225 Difference]: With dead ends: 2114 [2021-03-10 22:31:37,713 INFO L226 Difference]: Without dead ends: 2084 [2021-03-10 22:31:37,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-03-10 22:31:37,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1820. [2021-03-10 22:31:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 2.4876305662451896) internal successors, (4525), 1819 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 4525 transitions. [2021-03-10 22:31:37,730 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 4525 transitions. Word has length 32 [2021-03-10 22:31:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:37,730 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 4525 transitions. [2021-03-10 22:31:37,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 4525 transitions. [2021-03-10 22:31:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:37,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:37,732 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:37,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1831 [2021-03-10 22:31:37,935 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash -31276282, now seen corresponding path program 139 times [2021-03-10 22:31:37,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:37,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090092063] [2021-03-10 22:31:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:38,303 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 6 [2021-03-10 22:31:38,445 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2021-03-10 22:31:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090092063] [2021-03-10 22:31:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33496535] [2021-03-10 22:31:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:31:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:31:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:38,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:38,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966772668] [2021-03-10 22:31:38,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:38,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:38,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:38,868 INFO L87 Difference]: Start difference. First operand 1820 states and 4525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:39,909 INFO L93 Difference]: Finished difference Result 2026 states and 5020 transitions. [2021-03-10 22:31:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:31:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:39,912 INFO L225 Difference]: With dead ends: 2026 [2021-03-10 22:31:39,912 INFO L226 Difference]: Without dead ends: 1996 [2021-03-10 22:31:39,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:31:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-03-10 22:31:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1852. [2021-03-10 22:31:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.487844408427877) internal successors, (4605), 1851 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4605 transitions. [2021-03-10 22:31:39,929 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4605 transitions. Word has length 32 [2021-03-10 22:31:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:39,929 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 4605 transitions. [2021-03-10 22:31:39,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4605 transitions. [2021-03-10 22:31:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:39,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:39,930 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:40,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-03-10 22:31:40,131 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:40,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1329892926, now seen corresponding path program 140 times [2021-03-10 22:31:40,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:40,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326879266] [2021-03-10 22:31:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326879266] [2021-03-10 22:31:40,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174949500] [2021-03-10 22:31:40,406 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 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 [2021-03-10 22:31:40,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:40,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:40,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207011008] [2021-03-10 22:31:40,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:40,883 INFO L87 Difference]: Start difference. First operand 1852 states and 4605 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:41,571 INFO L93 Difference]: Finished difference Result 2010 states and 4984 transitions. [2021-03-10 22:31:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:31:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:41,574 INFO L225 Difference]: With dead ends: 2010 [2021-03-10 22:31:41,574 INFO L226 Difference]: Without dead ends: 1988 [2021-03-10 22:31:41,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1168.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:31:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-03-10 22:31:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1852. [2021-03-10 22:31:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.487844408427877) internal successors, (4605), 1851 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4605 transitions. [2021-03-10 22:31:41,592 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4605 transitions. Word has length 32 [2021-03-10 22:31:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:41,592 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 4605 transitions. [2021-03-10 22:31:41,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4605 transitions. [2021-03-10 22:31:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:41,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:41,594 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:41,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1872 [2021-03-10 22:31:41,794 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 141 times [2021-03-10 22:31:41,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:41,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480684371] [2021-03-10 22:31:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480684371] [2021-03-10 22:31:42,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488925486] [2021-03-10 22:31:42,040 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 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 [2021-03-10 22:31:42,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:31:42,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:42,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:42,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:42,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:42,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:42,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547826303] [2021-03-10 22:31:42,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:42,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:42,566 INFO L87 Difference]: Start difference. First operand 1852 states and 4605 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:43,389 INFO L93 Difference]: Finished difference Result 2114 states and 5236 transitions. [2021-03-10 22:31:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:31:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:43,391 INFO L225 Difference]: With dead ends: 2114 [2021-03-10 22:31:43,391 INFO L226 Difference]: Without dead ends: 2076 [2021-03-10 22:31:43,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1256.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:31:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-03-10 22:31:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1876. [2021-03-10 22:31:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.488) internal successors, (4665), 1875 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 4665 transitions. [2021-03-10 22:31:43,408 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 4665 transitions. Word has length 32 [2021-03-10 22:31:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:43,408 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 4665 transitions. [2021-03-10 22:31:43,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 4665 transitions. [2021-03-10 22:31:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:43,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:43,410 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:43,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:43,610 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 142 times [2021-03-10 22:31:43,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:43,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538311183] [2021-03-10 22:31:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:43,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538311183] [2021-03-10 22:31:43,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755089184] [2021-03-10 22:31:43,787 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 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 [2021-03-10 22:31:43,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:44,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:44,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682286840] [2021-03-10 22:31:44,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:44,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:44,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:44,278 INFO L87 Difference]: Start difference. First operand 1876 states and 4665 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:44,928 INFO L93 Difference]: Finished difference Result 2066 states and 5112 transitions. [2021-03-10 22:31:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:44,931 INFO L225 Difference]: With dead ends: 2066 [2021-03-10 22:31:44,931 INFO L226 Difference]: Without dead ends: 2020 [2021-03-10 22:31:44,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 971.3ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-03-10 22:31:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1868. [2021-03-10 22:31:44,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.487948580610605) internal successors, (4645), 1867 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 4645 transitions. [2021-03-10 22:31:44,949 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 4645 transitions. Word has length 32 [2021-03-10 22:31:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:44,949 INFO L480 AbstractCegarLoop]: Abstraction has 1868 states and 4645 transitions. [2021-03-10 22:31:44,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 4645 transitions. [2021-03-10 22:31:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:44,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:44,951 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:45,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-03-10 22:31:45,152 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:45,152 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 143 times [2021-03-10 22:31:45,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:45,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131081460] [2021-03-10 22:31:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131081460] [2021-03-10 22:31:45,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112317097] [2021-03-10 22:31:45,328 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 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 [2021-03-10 22:31:45,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:31:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:45,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:45,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352316657] [2021-03-10 22:31:45,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:45,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:45,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:45,774 INFO L87 Difference]: Start difference. First operand 1868 states and 4645 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:46,460 INFO L93 Difference]: Finished difference Result 2042 states and 5060 transitions. [2021-03-10 22:31:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:46,463 INFO L225 Difference]: With dead ends: 2042 [2021-03-10 22:31:46,463 INFO L226 Difference]: Without dead ends: 2012 [2021-03-10 22:31:46,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:31:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-03-10 22:31:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1884. [2021-03-10 22:31:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.4880509824747743) internal successors, (4685), 1883 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 4685 transitions. [2021-03-10 22:31:46,478 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 4685 transitions. Word has length 32 [2021-03-10 22:31:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:46,478 INFO L480 AbstractCegarLoop]: Abstraction has 1884 states and 4685 transitions. [2021-03-10 22:31:46,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 4685 transitions. [2021-03-10 22:31:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:46,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:46,480 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:46,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1924 [2021-03-10 22:31:46,680 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 144 times [2021-03-10 22:31:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:46,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841520359] [2021-03-10 22:31:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:46,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841520359] [2021-03-10 22:31:46,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313112890] [2021-03-10 22:31:46,908 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 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 [2021-03-10 22:31:46,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:31:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:47,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:47,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:47,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488559006] [2021-03-10 22:31:47,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:47,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:47,331 INFO L87 Difference]: Start difference. First operand 1884 states and 4685 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:48,084 INFO L93 Difference]: Finished difference Result 2098 states and 5196 transitions. [2021-03-10 22:31:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:31:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:48,087 INFO L225 Difference]: With dead ends: 2098 [2021-03-10 22:31:48,087 INFO L226 Difference]: Without dead ends: 2060 [2021-03-10 22:31:48,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1055.8ms TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:31:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-03-10 22:31:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1900. [2021-03-10 22:31:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.4881516587677726) internal successors, (4725), 1899 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 4725 transitions. [2021-03-10 22:31:48,104 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 4725 transitions. Word has length 32 [2021-03-10 22:31:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:48,104 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 4725 transitions. [2021-03-10 22:31:48,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 4725 transitions. [2021-03-10 22:31:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:48,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:48,106 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:48,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1937,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:48,319 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 822283450, now seen corresponding path program 145 times [2021-03-10 22:31:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:48,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260379118] [2021-03-10 22:31:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260379118] [2021-03-10 22:31:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402398147] [2021-03-10 22:31:48,573 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 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 [2021-03-10 22:31:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:48,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:49,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:49,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181414541] [2021-03-10 22:31:49,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:49,036 INFO L87 Difference]: Start difference. First operand 1900 states and 4725 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:49,824 INFO L93 Difference]: Finished difference Result 2170 states and 5372 transitions. [2021-03-10 22:31:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:31:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:49,827 INFO L225 Difference]: With dead ends: 2170 [2021-03-10 22:31:49,827 INFO L226 Difference]: Without dead ends: 2124 [2021-03-10 22:31:49,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1152.6ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:31:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-03-10 22:31:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1892. [2021-03-10 22:31:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 2.4881015335801164) internal successors, (4705), 1891 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 4705 transitions. [2021-03-10 22:31:49,851 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 4705 transitions. Word has length 32 [2021-03-10 22:31:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:49,851 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 4705 transitions. [2021-03-10 22:31:49,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 4705 transitions. [2021-03-10 22:31:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:49,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:49,853 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:50,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1954 [2021-03-10 22:31:50,054 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:50,054 INFO L82 PathProgramCache]: Analyzing trace with hash -448523582, now seen corresponding path program 146 times [2021-03-10 22:31:50,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:50,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166372398] [2021-03-10 22:31:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:50,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166372398] [2021-03-10 22:31:50,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864788254] [2021-03-10 22:31:50,502 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 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 [2021-03-10 22:31:50,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:31:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:51,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:51,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:51,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063502911] [2021-03-10 22:31:51,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:51,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:51,007 INFO L87 Difference]: Start difference. First operand 1892 states and 4705 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:51,745 INFO L93 Difference]: Finished difference Result 2130 states and 5276 transitions. [2021-03-10 22:31:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:31:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:51,748 INFO L225 Difference]: With dead ends: 2130 [2021-03-10 22:31:51,748 INFO L226 Difference]: Without dead ends: 2092 [2021-03-10 22:31:51,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1195.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:31:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-03-10 22:31:51,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1916. [2021-03-10 22:31:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 2.4882506527415145) internal successors, (4765), 1915 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 4765 transitions. [2021-03-10 22:31:51,765 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 4765 transitions. Word has length 32 [2021-03-10 22:31:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:51,765 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 4765 transitions. [2021-03-10 22:31:51,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 4765 transitions. [2021-03-10 22:31:51,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:51,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:51,766 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:51,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-03-10 22:31:51,967 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 147 times [2021-03-10 22:31:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:51,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507818059] [2021-03-10 22:31:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507818059] [2021-03-10 22:31:52,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551551885] [2021-03-10 22:31:52,201 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 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 [2021-03-10 22:31:52,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:31:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:52,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:52,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632500011] [2021-03-10 22:31:52,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:52,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:52,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:52,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:52,608 INFO L87 Difference]: Start difference. First operand 1916 states and 4765 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:53,603 INFO L93 Difference]: Finished difference Result 2258 states and 5604 transitions. [2021-03-10 22:31:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:31:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:53,605 INFO L225 Difference]: With dead ends: 2258 [2021-03-10 22:31:53,605 INFO L226 Difference]: Without dead ends: 2228 [2021-03-10 22:31:53,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1276.3ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:31:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-03-10 22:31:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1956. [2021-03-10 22:31:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 2.4884910485933505) internal successors, (4865), 1955 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 4865 transitions. [2021-03-10 22:31:53,623 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 4865 transitions. Word has length 32 [2021-03-10 22:31:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:53,623 INFO L480 AbstractCegarLoop]: Abstraction has 1956 states and 4865 transitions. [2021-03-10 22:31:53,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 4865 transitions. [2021-03-10 22:31:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:53,624 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:53,624 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:53,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1987,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:53,825 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:53,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:53,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 148 times [2021-03-10 22:31:53,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:53,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933652411] [2021-03-10 22:31:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933652411] [2021-03-10 22:31:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450236798] [2021-03-10 22:31:54,058 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 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 [2021-03-10 22:31:54,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:31:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:54,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:54,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:54,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464215570] [2021-03-10 22:31:54,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:54,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:54,445 INFO L87 Difference]: Start difference. First operand 1956 states and 4865 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:55,130 INFO L93 Difference]: Finished difference Result 2098 states and 5196 transitions. [2021-03-10 22:31:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:31:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:55,133 INFO L225 Difference]: With dead ends: 2098 [2021-03-10 22:31:55,133 INFO L226 Difference]: Without dead ends: 2060 [2021-03-10 22:31:55,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 954.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:31:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-03-10 22:31:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1948. [2021-03-10 22:31:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.4884437596302003) internal successors, (4845), 1947 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 4845 transitions. [2021-03-10 22:31:55,150 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 4845 transitions. Word has length 32 [2021-03-10 22:31:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:55,150 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 4845 transitions. [2021-03-10 22:31:55,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 4845 transitions. [2021-03-10 22:31:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:55,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:55,151 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:55,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-03-10 22:31:55,352 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1553149882, now seen corresponding path program 149 times [2021-03-10 22:31:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:55,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949532499] [2021-03-10 22:31:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949532499] [2021-03-10 22:31:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869358673] [2021-03-10 22:31:55,570 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 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 [2021-03-10 22:31:55,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:31:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:55,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:56,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:56,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:56,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772392406] [2021-03-10 22:31:56,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:56,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:56,020 INFO L87 Difference]: Start difference. First operand 1948 states and 4845 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:56,662 INFO L93 Difference]: Finished difference Result 2202 states and 5452 transitions. [2021-03-10 22:31:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:31:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:56,665 INFO L225 Difference]: With dead ends: 2202 [2021-03-10 22:31:56,665 INFO L226 Difference]: Without dead ends: 2156 [2021-03-10 22:31:56,665 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 990.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:31:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-03-10 22:31:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1964. [2021-03-10 22:31:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.488537952114111) internal successors, (4885), 1963 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 4885 transitions. [2021-03-10 22:31:56,683 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 4885 transitions. Word has length 32 [2021-03-10 22:31:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:56,683 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 4885 transitions. [2021-03-10 22:31:56,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 4885 transitions. [2021-03-10 22:31:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:56,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:56,685 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:56,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:56,885 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 150 times [2021-03-10 22:31:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:56,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600712452] [2021-03-10 22:31:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600712452] [2021-03-10 22:31:57,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959287294] [2021-03-10 22:31:57,150 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 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 [2021-03-10 22:31:57,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:31:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:31:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:57,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:57,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:57,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762842056] [2021-03-10 22:31:57,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:57,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:57,671 INFO L87 Difference]: Start difference. First operand 1964 states and 4885 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:31:58,481 INFO L93 Difference]: Finished difference Result 2210 states and 5476 transitions. [2021-03-10 22:31:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:31:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:31:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:31:58,484 INFO L225 Difference]: With dead ends: 2210 [2021-03-10 22:31:58,484 INFO L226 Difference]: Without dead ends: 2172 [2021-03-10 22:31:58,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:31:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-10 22:31:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1988. [2021-03-10 22:31:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.4886763965777554) internal successors, (4945), 1987 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4945 transitions. [2021-03-10 22:31:58,501 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4945 transitions. Word has length 32 [2021-03-10 22:31:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:31:58,501 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4945 transitions. [2021-03-10 22:31:58,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:31:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4945 transitions. [2021-03-10 22:31:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:31:58,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:31:58,502 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:31:58,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:31:58,703 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:31:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:31:58,703 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 151 times [2021-03-10 22:31:58,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:31:58,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413969042] [2021-03-10 22:31:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:31:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:58,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413969042] [2021-03-10 22:31:58,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574294372] [2021-03-10 22:31:58,985 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 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 [2021-03-10 22:31:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:31:59,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:31:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:31:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:31:59,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:31:59,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:31:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558699335] [2021-03-10 22:31:59,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:31:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:31:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:31:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:31:59,539 INFO L87 Difference]: Start difference. First operand 1988 states and 4945 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:00,516 INFO L93 Difference]: Finished difference Result 2258 states and 5604 transitions. [2021-03-10 22:32:00,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:00,519 INFO L225 Difference]: With dead ends: 2258 [2021-03-10 22:32:00,519 INFO L226 Difference]: Without dead ends: 2236 [2021-03-10 22:32:00,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1463.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:32:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-03-10 22:32:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1972. [2021-03-10 22:32:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 2.4885844748858448) internal successors, (4905), 1971 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 4905 transitions. [2021-03-10 22:32:00,539 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 4905 transitions. Word has length 32 [2021-03-10 22:32:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:00,539 INFO L480 AbstractCegarLoop]: Abstraction has 1972 states and 4905 transitions. [2021-03-10 22:32:00,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 4905 transitions. [2021-03-10 22:32:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:00,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:00,541 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:00,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2064,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:00,742 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:00,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 152 times [2021-03-10 22:32:00,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:00,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711012525] [2021-03-10 22:32:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:00,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711012525] [2021-03-10 22:32:00,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111994783] [2021-03-10 22:32:00,953 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 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 [2021-03-10 22:32:00,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:00,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:01,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:01,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261132766] [2021-03-10 22:32:01,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:01,399 INFO L87 Difference]: Start difference. First operand 1972 states and 4905 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:02,036 INFO L93 Difference]: Finished difference Result 2146 states and 5316 transitions. [2021-03-10 22:32:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:02,038 INFO L225 Difference]: With dead ends: 2146 [2021-03-10 22:32:02,038 INFO L226 Difference]: Without dead ends: 2108 [2021-03-10 22:32:02,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-03-10 22:32:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1988. [2021-03-10 22:32:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.4886763965777554) internal successors, (4945), 1987 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4945 transitions. [2021-03-10 22:32:02,055 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4945 transitions. Word has length 32 [2021-03-10 22:32:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:02,055 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4945 transitions. [2021-03-10 22:32:02,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4945 transitions. [2021-03-10 22:32:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:02,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:02,057 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:02,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2084 [2021-03-10 22:32:02,257 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 153 times [2021-03-10 22:32:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:02,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890954779] [2021-03-10 22:32:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890954779] [2021-03-10 22:32:02,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084502302] [2021-03-10 22:32:02,463 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 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 [2021-03-10 22:32:02,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:32:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:02,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:03,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035347568] [2021-03-10 22:32:03,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:03,016 INFO L87 Difference]: Start difference. First operand 1988 states and 4945 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:03,844 INFO L93 Difference]: Finished difference Result 2322 states and 5756 transitions. [2021-03-10 22:32:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:03,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:03,847 INFO L225 Difference]: With dead ends: 2322 [2021-03-10 22:32:03,847 INFO L226 Difference]: Without dead ends: 2276 [2021-03-10 22:32:03,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1273.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-03-10 22:32:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2012. [2021-03-10 22:32:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 2.4888115365489805) internal successors, (5005), 2011 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 5005 transitions. [2021-03-10 22:32:03,866 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 5005 transitions. Word has length 32 [2021-03-10 22:32:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:03,866 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 5005 transitions. [2021-03-10 22:32:03,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 5005 transitions. [2021-03-10 22:32:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:03,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:03,867 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:04,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:04,068 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:04,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1640178558, now seen corresponding path program 154 times [2021-03-10 22:32:04,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:04,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299440581] [2021-03-10 22:32:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:04,305 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 12 [2021-03-10 22:32:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:04,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299440581] [2021-03-10 22:32:04,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711045824] [2021-03-10 22:32:04,448 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 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 [2021-03-10 22:32:04,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:04,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:04,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:04,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:04,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055116385] [2021-03-10 22:32:04,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:04,933 INFO L87 Difference]: Start difference. First operand 2012 states and 5005 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:05,695 INFO L93 Difference]: Finished difference Result 2266 states and 5620 transitions. [2021-03-10 22:32:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:05,697 INFO L225 Difference]: With dead ends: 2266 [2021-03-10 22:32:05,697 INFO L226 Difference]: Without dead ends: 2236 [2021-03-10 22:32:05,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1120.9ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-03-10 22:32:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2020. [2021-03-10 22:32:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 2.488855869242199) internal successors, (5025), 2019 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 5025 transitions. [2021-03-10 22:32:05,717 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 5025 transitions. Word has length 32 [2021-03-10 22:32:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:05,717 INFO L480 AbstractCegarLoop]: Abstraction has 2020 states and 5025 transitions. [2021-03-10 22:32:05,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 5025 transitions. [2021-03-10 22:32:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:05,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:05,718 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:05,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2115 [2021-03-10 22:32:05,919 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1816200190, now seen corresponding path program 155 times [2021-03-10 22:32:05,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638839146] [2021-03-10 22:32:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:06,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638839146] [2021-03-10 22:32:06,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661245613] [2021-03-10 22:32:06,279 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 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 [2021-03-10 22:32:06,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:32:06,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:06,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365427954] [2021-03-10 22:32:06,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:06,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:06,814 INFO L87 Difference]: Start difference. First operand 2020 states and 5025 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:07,478 INFO L93 Difference]: Finished difference Result 2218 states and 5500 transitions. [2021-03-10 22:32:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:07,481 INFO L225 Difference]: With dead ends: 2218 [2021-03-10 22:32:07,481 INFO L226 Difference]: Without dead ends: 2188 [2021-03-10 22:32:07,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1194.4ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:32:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-03-10 22:32:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2060. [2021-03-10 22:32:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.4890723652258377) internal successors, (5125), 2059 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5125 transitions. [2021-03-10 22:32:07,498 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5125 transitions. Word has length 32 [2021-03-10 22:32:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:07,498 INFO L480 AbstractCegarLoop]: Abstraction has 2060 states and 5125 transitions. [2021-03-10 22:32:07,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5125 transitions. [2021-03-10 22:32:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:07,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:07,500 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:07,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-03-10 22:32:07,701 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1379646338, now seen corresponding path program 156 times [2021-03-10 22:32:07,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:07,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516477171] [2021-03-10 22:32:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516477171] [2021-03-10 22:32:08,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848953490] [2021-03-10 22:32:08,004 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 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 [2021-03-10 22:32:08,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:32:08,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:08,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:08,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043922645] [2021-03-10 22:32:08,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:08,510 INFO L87 Difference]: Start difference. First operand 2060 states and 5125 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:09,498 INFO L93 Difference]: Finished difference Result 2338 states and 5800 transitions. [2021-03-10 22:32:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:32:09,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:09,501 INFO L225 Difference]: With dead ends: 2338 [2021-03-10 22:32:09,501 INFO L226 Difference]: Without dead ends: 2300 [2021-03-10 22:32:09,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1392.2ms TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:32:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-03-10 22:32:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2076. [2021-03-10 22:32:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.4891566265060243) internal successors, (5165), 2075 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 5165 transitions. [2021-03-10 22:32:09,518 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 5165 transitions. Word has length 32 [2021-03-10 22:32:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:09,519 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 5165 transitions. [2021-03-10 22:32:09,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 5165 transitions. [2021-03-10 22:32:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:09,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:09,520 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:09,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2147 [2021-03-10 22:32:09,731 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 157 times [2021-03-10 22:32:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261460920] [2021-03-10 22:32:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:09,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261460920] [2021-03-10 22:32:09,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643149507] [2021-03-10 22:32:09,940 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 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 [2021-03-10 22:32:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:10,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:10,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037036029] [2021-03-10 22:32:10,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:10,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:10,425 INFO L87 Difference]: Start difference. First operand 2076 states and 5165 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:11,273 INFO L93 Difference]: Finished difference Result 2274 states and 5640 transitions. [2021-03-10 22:32:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:32:11,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:11,276 INFO L225 Difference]: With dead ends: 2274 [2021-03-10 22:32:11,276 INFO L226 Difference]: Without dead ends: 2244 [2021-03-10 22:32:11,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1204.6ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:32:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-03-10 22:32:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2068. [2021-03-10 22:32:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.48911465892598) internal successors, (5145), 2067 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5145 transitions. [2021-03-10 22:32:11,293 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5145 transitions. Word has length 32 [2021-03-10 22:32:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:11,293 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5145 transitions. [2021-03-10 22:32:11,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5145 transitions. [2021-03-10 22:32:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:11,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:11,295 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:11,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-03-10 22:32:11,495 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 158 times [2021-03-10 22:32:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:11,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118015793] [2021-03-10 22:32:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:11,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118015793] [2021-03-10 22:32:11,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412926147] [2021-03-10 22:32:11,766 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 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 [2021-03-10 22:32:11,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:11,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:12,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:12,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157518177] [2021-03-10 22:32:12,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:12,315 INFO L87 Difference]: Start difference. First operand 2068 states and 5145 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:13,117 INFO L93 Difference]: Finished difference Result 2258 states and 5600 transitions. [2021-03-10 22:32:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:13,120 INFO L225 Difference]: With dead ends: 2258 [2021-03-10 22:32:13,120 INFO L226 Difference]: Without dead ends: 2228 [2021-03-10 22:32:13,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1290.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:32:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-03-10 22:32:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2084. [2021-03-10 22:32:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4891982717234757) internal successors, (5185), 2083 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5185 transitions. [2021-03-10 22:32:13,137 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5185 transitions. Word has length 32 [2021-03-10 22:32:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:13,137 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 5185 transitions. [2021-03-10 22:32:13,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5185 transitions. [2021-03-10 22:32:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:13,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:13,139 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:13,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:13,339 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1459614522, now seen corresponding path program 159 times [2021-03-10 22:32:13,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:13,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008507931] [2021-03-10 22:32:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:13,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008507931] [2021-03-10 22:32:13,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564294304] [2021-03-10 22:32:13,725 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 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 [2021-03-10 22:32:13,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:32:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:13,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:14,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:14,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:14,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835351966] [2021-03-10 22:32:14,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:14,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:14,311 INFO L87 Difference]: Start difference. First operand 2084 states and 5185 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:14,806 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-03-10 22:32:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:15,302 INFO L93 Difference]: Finished difference Result 2194 states and 5444 transitions. [2021-03-10 22:32:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:15,305 INFO L225 Difference]: With dead ends: 2194 [2021-03-10 22:32:15,305 INFO L226 Difference]: Without dead ends: 2172 [2021-03-10 22:32:15,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1601.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-10 22:32:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2092. [2021-03-10 22:32:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.4892395982783357) internal successors, (5205), 2091 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5205 transitions. [2021-03-10 22:32:15,324 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5205 transitions. Word has length 32 [2021-03-10 22:32:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:15,324 INFO L480 AbstractCegarLoop]: Abstraction has 2092 states and 5205 transitions. [2021-03-10 22:32:15,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5205 transitions. [2021-03-10 22:32:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:15,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:15,326 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:15,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2202,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:15,526 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -271155210, now seen corresponding path program 160 times [2021-03-10 22:32:15,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:15,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661295143] [2021-03-10 22:32:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:15,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661295143] [2021-03-10 22:32:15,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314842543] [2021-03-10 22:32:15,803 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 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 [2021-03-10 22:32:15,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:16,304 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:32:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019820432] [2021-03-10 22:32:16,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:16,445 INFO L87 Difference]: Start difference. First operand 2092 states and 5205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:17,236 INFO L93 Difference]: Finished difference Result 2266 states and 5624 transitions. [2021-03-10 22:32:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:17,239 INFO L225 Difference]: With dead ends: 2266 [2021-03-10 22:32:17,239 INFO L226 Difference]: Without dead ends: 2244 [2021-03-10 22:32:17,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1357.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:32:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-03-10 22:32:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2092. [2021-03-10 22:32:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.4892395982783357) internal successors, (5205), 2091 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5205 transitions. [2021-03-10 22:32:17,259 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5205 transitions. Word has length 32 [2021-03-10 22:32:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:17,259 INFO L480 AbstractCegarLoop]: Abstraction has 2092 states and 5205 transitions. [2021-03-10 22:32:17,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5205 transitions. [2021-03-10 22:32:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:17,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:17,261 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:17,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-03-10 22:32:17,461 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1896809222, now seen corresponding path program 161 times [2021-03-10 22:32:17,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:17,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181814443] [2021-03-10 22:32:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:17,689 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 14 [2021-03-10 22:32:17,844 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 16 [2021-03-10 22:32:18,009 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2021-03-10 22:32:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181814443] [2021-03-10 22:32:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933977762] [2021-03-10 22:32:18,201 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 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 [2021-03-10 22:32:18,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 22:32:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:18,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:18,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:18,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125617482] [2021-03-10 22:32:18,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:18,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:18,577 INFO L87 Difference]: Start difference. First operand 2092 states and 5205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:19,212 INFO L93 Difference]: Finished difference Result 2202 states and 5452 transitions. [2021-03-10 22:32:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:19,215 INFO L225 Difference]: With dead ends: 2202 [2021-03-10 22:32:19,215 INFO L226 Difference]: Without dead ends: 2156 [2021-03-10 22:32:19,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:32:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-03-10 22:32:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2108. [2021-03-10 22:32:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-03-10 22:32:19,234 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-03-10 22:32:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:19,234 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-03-10 22:32:19,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-03-10 22:32:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:19,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:19,236 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:19,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2246,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:19,437 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 162 times [2021-03-10 22:32:19,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:19,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609264442] [2021-03-10 22:32:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:19,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609264442] [2021-03-10 22:32:19,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178540958] [2021-03-10 22:32:19,726 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:19,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:32:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:32:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:20,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:20,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:20,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301011111] [2021-03-10 22:32:20,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:20,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:20,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:20,106 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:20,512 INFO L93 Difference]: Finished difference Result 2234 states and 5540 transitions. [2021-03-10 22:32:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:20,514 INFO L225 Difference]: With dead ends: 2234 [2021-03-10 22:32:20,514 INFO L226 Difference]: Without dead ends: 2204 [2021-03-10 22:32:20,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-03-10 22:32:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2108. [2021-03-10 22:32:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-03-10 22:32:20,531 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-03-10 22:32:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:20,531 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-03-10 22:32:20,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-03-10 22:32:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:20,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:20,533 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:20,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2261 [2021-03-10 22:32:20,733 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1878561090, now seen corresponding path program 163 times [2021-03-10 22:32:20,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:20,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475515794] [2021-03-10 22:32:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:20,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475515794] [2021-03-10 22:32:20,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411393806] [2021-03-10 22:32:20,878 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:32:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:21,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:21,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:21,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181414423] [2021-03-10 22:32:21,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:21,248 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:21,791 INFO L93 Difference]: Finished difference Result 2306 states and 5724 transitions. [2021-03-10 22:32:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:21,794 INFO L225 Difference]: With dead ends: 2306 [2021-03-10 22:32:21,794 INFO L226 Difference]: Without dead ends: 2276 [2021-03-10 22:32:21,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-03-10 22:32:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2108. [2021-03-10 22:32:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-03-10 22:32:21,812 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-03-10 22:32:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:21,812 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-03-10 22:32:21,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-03-10 22:32:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:21,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:21,813 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:22,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-03-10 22:32:22,014 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:22,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1521975422, now seen corresponding path program 164 times [2021-03-10 22:32:22,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:22,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082784495] [2021-03-10 22:32:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082784495] [2021-03-10 22:32:22,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344641523] [2021-03-10 22:32:22,264 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:22,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:22,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:22,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:22,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166588852] [2021-03-10 22:32:22,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:22,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:22,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:22,701 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:23,423 INFO L93 Difference]: Finished difference Result 2338 states and 5800 transitions. [2021-03-10 22:32:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:23,425 INFO L225 Difference]: With dead ends: 2338 [2021-03-10 22:32:23,425 INFO L226 Difference]: Without dead ends: 2308 [2021-03-10 22:32:23,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1045.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-03-10 22:32:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2124. [2021-03-10 22:32:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-03-10 22:32:23,444 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-03-10 22:32:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:23,444 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-03-10 22:32:23,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-03-10 22:32:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:23,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:23,445 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:23,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:23,646 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1709665722, now seen corresponding path program 165 times [2021-03-10 22:32:23,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135346652] [2021-03-10 22:32:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:24,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135346652] [2021-03-10 22:32:24,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834019190] [2021-03-10 22:32:24,017 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:32:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:24,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:24,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012640331] [2021-03-10 22:32:24,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:24,509 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:25,306 INFO L93 Difference]: Finished difference Result 2370 states and 5876 transitions. [2021-03-10 22:32:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:25,307 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:25,309 INFO L225 Difference]: With dead ends: 2370 [2021-03-10 22:32:25,309 INFO L226 Difference]: Without dead ends: 2332 [2021-03-10 22:32:25,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-03-10 22:32:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2132. [2021-03-10 22:32:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-03-10 22:32:25,327 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-03-10 22:32:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:25,327 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-03-10 22:32:25,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-03-10 22:32:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:25,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:25,329 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:25,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2308,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:25,529 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 438858690, now seen corresponding path program 166 times [2021-03-10 22:32:25,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:25,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025188068] [2021-03-10 22:32:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:25,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025188068] [2021-03-10 22:32:25,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711638029] [2021-03-10 22:32:25,783 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:25,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:26,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:26,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701413016] [2021-03-10 22:32:26,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:26,299 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:27,038 INFO L93 Difference]: Finished difference Result 2354 states and 5836 transitions. [2021-03-10 22:32:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:27,040 INFO L225 Difference]: With dead ends: 2354 [2021-03-10 22:32:27,040 INFO L226 Difference]: Without dead ends: 2316 [2021-03-10 22:32:27,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1201.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:27,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-03-10 22:32:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2140. [2021-03-10 22:32:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 2.4894810659186537) internal successors, (5325), 2139 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 5325 transitions. [2021-03-10 22:32:27,059 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 5325 transitions. Word has length 32 [2021-03-10 22:32:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:27,059 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 5325 transitions. [2021-03-10 22:32:27,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 5325 transitions. [2021-03-10 22:32:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:27,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:27,060 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:27,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2336 [2021-03-10 22:32:27,261 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1291911042, now seen corresponding path program 167 times [2021-03-10 22:32:27,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:27,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471312406] [2021-03-10 22:32:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471312406] [2021-03-10 22:32:27,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772356351] [2021-03-10 22:32:27,530 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:27,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:32:27,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:28,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:28,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:28,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461699152] [2021-03-10 22:32:28,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:28,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:28,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:28,067 INFO L87 Difference]: Start difference. First operand 2140 states and 5325 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:28,728 INFO L93 Difference]: Finished difference Result 2290 states and 5684 transitions. [2021-03-10 22:32:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:32:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:28,731 INFO L225 Difference]: With dead ends: 2290 [2021-03-10 22:32:28,731 INFO L226 Difference]: Without dead ends: 2268 [2021-03-10 22:32:28,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1117.6ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:32:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-03-10 22:32:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2124. [2021-03-10 22:32:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-03-10 22:32:28,750 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-03-10 22:32:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:28,750 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-03-10 22:32:28,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-03-10 22:32:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:28,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:28,751 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:28,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-03-10 22:32:28,952 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:28,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 168 times [2021-03-10 22:32:28,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:28,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711614079] [2021-03-10 22:32:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711614079] [2021-03-10 22:32:29,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714790964] [2021-03-10 22:32:29,150 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:29,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:32:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:29,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:29,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:29,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078680595] [2021-03-10 22:32:29,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:29,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:29,624 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:30,342 INFO L93 Difference]: Finished difference Result 2410 states and 5976 transitions. [2021-03-10 22:32:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:30,344 INFO L225 Difference]: With dead ends: 2410 [2021-03-10 22:32:30,344 INFO L226 Difference]: Without dead ends: 2372 [2021-03-10 22:32:30,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1042.9ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:32:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-03-10 22:32:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2140. [2021-03-10 22:32:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 2.4894810659186537) internal successors, (5325), 2139 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 5325 transitions. [2021-03-10 22:32:30,364 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 5325 transitions. Word has length 32 [2021-03-10 22:32:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:30,364 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 5325 transitions. [2021-03-10 22:32:30,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 5325 transitions. [2021-03-10 22:32:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:30,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:30,366 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:30,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2379 [2021-03-10 22:32:30,566 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 169 times [2021-03-10 22:32:30,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:30,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030681632] [2021-03-10 22:32:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:30,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030681632] [2021-03-10 22:32:30,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583912357] [2021-03-10 22:32:30,759 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:31,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:31,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:31,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309842579] [2021-03-10 22:32:31,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:31,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:31,314 INFO L87 Difference]: Start difference. First operand 2140 states and 5325 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:32,246 INFO L93 Difference]: Finished difference Result 2426 states and 6020 transitions. [2021-03-10 22:32:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:32,249 INFO L225 Difference]: With dead ends: 2426 [2021-03-10 22:32:32,249 INFO L226 Difference]: Without dead ends: 2396 [2021-03-10 22:32:32,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1288.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-03-10 22:32:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2116. [2021-03-10 22:32:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.4893617021276597) internal successors, (5265), 2115 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 5265 transitions. [2021-03-10 22:32:32,267 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 5265 transitions. Word has length 32 [2021-03-10 22:32:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:32,267 INFO L480 AbstractCegarLoop]: Abstraction has 2116 states and 5265 transitions. [2021-03-10 22:32:32,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 5265 transitions. [2021-03-10 22:32:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:32,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:32,268 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:32,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,469 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 170 times [2021-03-10 22:32:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:32,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511544121] [2021-03-10 22:32:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511544121] [2021-03-10 22:32:32,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450379538] [2021-03-10 22:32:32,730 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:32,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:33,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:33,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810856922] [2021-03-10 22:32:33,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:33,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:33,140 INFO L87 Difference]: Start difference. First operand 2116 states and 5265 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:33,824 INFO L93 Difference]: Finished difference Result 2234 states and 5536 transitions. [2021-03-10 22:32:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:32:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:33,827 INFO L225 Difference]: With dead ends: 2234 [2021-03-10 22:32:33,827 INFO L226 Difference]: Without dead ends: 2196 [2021-03-10 22:32:33,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 917.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:32:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-03-10 22:32:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2132. [2021-03-10 22:32:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-03-10 22:32:33,845 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-03-10 22:32:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:33,845 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-03-10 22:32:33,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-03-10 22:32:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:33,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:33,847 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:34,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2422 [2021-03-10 22:32:34,047 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 171 times [2021-03-10 22:32:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:34,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151251853] [2021-03-10 22:32:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:34,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151251853] [2021-03-10 22:32:34,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436654488] [2021-03-10 22:32:34,298 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:34,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:32:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:34,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:34,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546080151] [2021-03-10 22:32:34,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:34,796 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:35,464 INFO L93 Difference]: Finished difference Result 2354 states and 5836 transitions. [2021-03-10 22:32:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:35,467 INFO L225 Difference]: With dead ends: 2354 [2021-03-10 22:32:35,467 INFO L226 Difference]: Without dead ends: 2308 [2021-03-10 22:32:35,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1032.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-03-10 22:32:35,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2132. [2021-03-10 22:32:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-03-10 22:32:35,484 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-03-10 22:32:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:35,484 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-03-10 22:32:35,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-03-10 22:32:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:35,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:35,486 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:35,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-03-10 22:32:35,686 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1181393790, now seen corresponding path program 172 times [2021-03-10 22:32:35,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:35,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118267814] [2021-03-10 22:32:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118267814] [2021-03-10 22:32:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474246356] [2021-03-10 22:32:35,930 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:35,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:35,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:36,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:36,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:36,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486062648] [2021-03-10 22:32:36,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:36,340 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:37,252 INFO L93 Difference]: Finished difference Result 2290 states and 5680 transitions. [2021-03-10 22:32:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:32:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:37,255 INFO L225 Difference]: With dead ends: 2290 [2021-03-10 22:32:37,255 INFO L226 Difference]: Without dead ends: 2260 [2021-03-10 22:32:37,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:32:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-03-10 22:32:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2124. [2021-03-10 22:32:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-03-10 22:32:37,272 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-03-10 22:32:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:37,272 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-03-10 22:32:37,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-03-10 22:32:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:37,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:37,273 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:37,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2457,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:37,474 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:37,474 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 173 times [2021-03-10 22:32:37,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:37,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827741609] [2021-03-10 22:32:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:38,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827741609] [2021-03-10 22:32:38,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891839327] [2021-03-10 22:32:38,013 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:38,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:32:38,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:38,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:38,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:38,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:38,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466870257] [2021-03-10 22:32:38,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:38,598 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:39,609 INFO L93 Difference]: Finished difference Result 2506 states and 6212 transitions. [2021-03-10 22:32:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:32:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:39,612 INFO L225 Difference]: With dead ends: 2506 [2021-03-10 22:32:39,612 INFO L226 Difference]: Without dead ends: 2460 [2021-03-10 22:32:39,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1584.1ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:32:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-03-10 22:32:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2156. [2021-03-10 22:32:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.4895591647331785) internal successors, (5365), 2155 states have internal predecessors, (5365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 5365 transitions. [2021-03-10 22:32:39,630 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 5365 transitions. Word has length 32 [2021-03-10 22:32:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:39,630 INFO L480 AbstractCegarLoop]: Abstraction has 2156 states and 5365 transitions. [2021-03-10 22:32:39,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 5365 transitions. [2021-03-10 22:32:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:39,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:39,631 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:39,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2475 [2021-03-10 22:32:39,832 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -490019970, now seen corresponding path program 174 times [2021-03-10 22:32:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:39,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641246468] [2021-03-10 22:32:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:40,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641246468] [2021-03-10 22:32:40,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451808958] [2021-03-10 22:32:40,100 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:40,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:32:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:40,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:40,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:40,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283969535] [2021-03-10 22:32:40,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:40,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:40,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:40,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:40,561 INFO L87 Difference]: Start difference. First operand 2156 states and 5365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:41,180 INFO L93 Difference]: Finished difference Result 2330 states and 5776 transitions. [2021-03-10 22:32:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:32:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:41,182 INFO L225 Difference]: With dead ends: 2330 [2021-03-10 22:32:41,182 INFO L226 Difference]: Without dead ends: 2292 [2021-03-10 22:32:41,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:32:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-03-10 22:32:41,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2172. [2021-03-10 22:32:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.4896361123906035) internal successors, (5405), 2171 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5405 transitions. [2021-03-10 22:32:41,202 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5405 transitions. Word has length 32 [2021-03-10 22:32:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:41,202 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 5405 transitions. [2021-03-10 22:32:41,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5405 transitions. [2021-03-10 22:32:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:41,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:41,204 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:41,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:41,404 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -302329670, now seen corresponding path program 175 times [2021-03-10 22:32:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999255782] [2021-03-10 22:32:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:41,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999255782] [2021-03-10 22:32:41,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385595449] [2021-03-10 22:32:41,837 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:41,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:41,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:42,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:42,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:42,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89393638] [2021-03-10 22:32:42,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:42,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:42,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:42,410 INFO L87 Difference]: Start difference. First operand 2172 states and 5405 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:43,238 INFO L93 Difference]: Finished difference Result 2450 states and 6076 transitions. [2021-03-10 22:32:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:32:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:43,241 INFO L225 Difference]: With dead ends: 2450 [2021-03-10 22:32:43,241 INFO L226 Difference]: Without dead ends: 2412 [2021-03-10 22:32:43,241 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1365.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:32:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-10 22:32:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2188. [2021-03-10 22:32:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4897119341563787) internal successors, (5445), 2187 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5445 transitions. [2021-03-10 22:32:43,258 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5445 transitions. Word has length 32 [2021-03-10 22:32:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:43,258 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 5445 transitions. [2021-03-10 22:32:43,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5445 transitions. [2021-03-10 22:32:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:43,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:43,260 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:43,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2511,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:43,460 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:43,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 176 times [2021-03-10 22:32:43,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:43,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101357302] [2021-03-10 22:32:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:43,666 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-03-10 22:32:43,892 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-03-10 22:32:44,107 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-03-10 22:32:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101357302] [2021-03-10 22:32:44,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555735762] [2021-03-10 22:32:44,238 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:44,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:44,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:44,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:44,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999631735] [2021-03-10 22:32:44,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:44,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:44,766 INFO L87 Difference]: Start difference. First operand 2188 states and 5445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:45,621 INFO L93 Difference]: Finished difference Result 2498 states and 6200 transitions. [2021-03-10 22:32:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:32:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:45,624 INFO L225 Difference]: With dead ends: 2498 [2021-03-10 22:32:45,624 INFO L226 Difference]: Without dead ends: 2468 [2021-03-10 22:32:45,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1353.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:32:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-03-10 22:32:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2172. [2021-03-10 22:32:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.4896361123906035) internal successors, (5405), 2171 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5405 transitions. [2021-03-10 22:32:45,646 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5405 transitions. Word has length 32 [2021-03-10 22:32:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:45,646 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 5405 transitions. [2021-03-10 22:32:45,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5405 transitions. [2021-03-10 22:32:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:45,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:45,648 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:45,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2532 [2021-03-10 22:32:45,848 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 177 times [2021-03-10 22:32:45,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:45,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498367684] [2021-03-10 22:32:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:46,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498367684] [2021-03-10 22:32:46,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498229741] [2021-03-10 22:32:46,072 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:46,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:32:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:46,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:46,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475845603] [2021-03-10 22:32:46,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:46,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:46,669 INFO L87 Difference]: Start difference. First operand 2172 states and 5405 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:47,599 INFO L93 Difference]: Finished difference Result 2386 states and 5924 transitions. [2021-03-10 22:32:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:32:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:47,602 INFO L225 Difference]: With dead ends: 2386 [2021-03-10 22:32:47,602 INFO L226 Difference]: Without dead ends: 2364 [2021-03-10 22:32:47,602 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1397.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:32:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-03-10 22:32:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2180. [2021-03-10 22:32:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 2.489674162459844) internal successors, (5425), 2179 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 5425 transitions. [2021-03-10 22:32:47,625 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 5425 transitions. Word has length 32 [2021-03-10 22:32:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:47,625 INFO L480 AbstractCegarLoop]: Abstraction has 2180 states and 5425 transitions. [2021-03-10 22:32:47,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 5425 transitions. [2021-03-10 22:32:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:47,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:47,626 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:47,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2546 [2021-03-10 22:32:47,827 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 178 times [2021-03-10 22:32:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578442958] [2021-03-10 22:32:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:48,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578442958] [2021-03-10 22:32:48,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076937521] [2021-03-10 22:32:48,095 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:48,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:32:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188984438] [2021-03-10 22:32:48,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:48,597 INFO L87 Difference]: Start difference. First operand 2180 states and 5425 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:49,578 INFO L93 Difference]: Finished difference Result 2482 states and 6160 transitions. [2021-03-10 22:32:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:32:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:49,581 INFO L225 Difference]: With dead ends: 2482 [2021-03-10 22:32:49,581 INFO L226 Difference]: Without dead ends: 2452 [2021-03-10 22:32:49,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1383.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:32:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-03-10 22:32:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2188. [2021-03-10 22:32:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4897119341563787) internal successors, (5445), 2187 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5445 transitions. [2021-03-10 22:32:49,604 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5445 transitions. Word has length 32 [2021-03-10 22:32:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:49,604 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 5445 transitions. [2021-03-10 22:32:49,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5445 transitions. [2021-03-10 22:32:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:49,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:49,606 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:49,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2559 [2021-03-10 22:32:49,806 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:49,806 INFO L82 PathProgramCache]: Analyzing trace with hash 766874298, now seen corresponding path program 179 times [2021-03-10 22:32:49,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:49,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854954042] [2021-03-10 22:32:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854954042] [2021-03-10 22:32:50,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280394469] [2021-03-10 22:32:50,032 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:50,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:32:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:50,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:50,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:50,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770112370] [2021-03-10 22:32:50,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:50,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:50,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:50,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:50,535 INFO L87 Difference]: Start difference. First operand 2188 states and 5445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:50,816 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:32:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:51,584 INFO L93 Difference]: Finished difference Result 2458 states and 6100 transitions. [2021-03-10 22:32:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:32:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:51,587 INFO L225 Difference]: With dead ends: 2458 [2021-03-10 22:32:51,587 INFO L226 Difference]: Without dead ends: 2428 [2021-03-10 22:32:51,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1417.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:32:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-03-10 22:32:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2212. [2021-03-10 22:32:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.4898236092265944) internal successors, (5505), 2211 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 5505 transitions. [2021-03-10 22:32:51,605 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 5505 transitions. Word has length 32 [2021-03-10 22:32:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:51,605 INFO L480 AbstractCegarLoop]: Abstraction has 2212 states and 5505 transitions. [2021-03-10 22:32:51,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 5505 transitions. [2021-03-10 22:32:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:51,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:51,607 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:51,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2578,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:51,808 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 180 times [2021-03-10 22:32:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:51,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622157418] [2021-03-10 22:32:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622157418] [2021-03-10 22:32:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307977171] [2021-03-10 22:32:52,035 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:52,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:32:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:32:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:52,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:52,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:52,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571189387] [2021-03-10 22:32:52,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:52,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:52,579 INFO L87 Difference]: Start difference. First operand 2212 states and 5505 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:53,224 INFO L93 Difference]: Finished difference Result 2482 states and 6160 transitions. [2021-03-10 22:32:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:32:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:53,227 INFO L225 Difference]: With dead ends: 2482 [2021-03-10 22:32:53,227 INFO L226 Difference]: Without dead ends: 2452 [2021-03-10 22:32:53,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1087.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:32:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-03-10 22:32:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2220. [2021-03-10 22:32:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.4898602974312753) internal successors, (5525), 2219 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 5525 transitions. [2021-03-10 22:32:53,248 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 5525 transitions. Word has length 32 [2021-03-10 22:32:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:53,248 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 5525 transitions. [2021-03-10 22:32:53,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 5525 transitions. [2021-03-10 22:32:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:53,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:53,255 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:53,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2594,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:53,459 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 181 times [2021-03-10 22:32:53,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:53,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037246441] [2021-03-10 22:32:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:53,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037246441] [2021-03-10 22:32:53,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188061605] [2021-03-10 22:32:53,698 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:54,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:54,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:54,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442976784] [2021-03-10 22:32:54,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:54,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:54,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:54,275 INFO L87 Difference]: Start difference. First operand 2220 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:55,246 INFO L93 Difference]: Finished difference Result 2482 states and 6156 transitions. [2021-03-10 22:32:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:55,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:55,249 INFO L225 Difference]: With dead ends: 2482 [2021-03-10 22:32:55,249 INFO L226 Difference]: Without dead ends: 2444 [2021-03-10 22:32:55,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1421.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:32:55,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-03-10 22:32:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2228. [2021-03-10 22:32:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.4898967220475976) internal successors, (5545), 2227 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 5545 transitions. [2021-03-10 22:32:55,270 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 5545 transitions. Word has length 32 [2021-03-10 22:32:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:55,270 INFO L480 AbstractCegarLoop]: Abstraction has 2228 states and 5545 transitions. [2021-03-10 22:32:55,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 5545 transitions. [2021-03-10 22:32:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:55,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:55,271 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:55,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2611 [2021-03-10 22:32:55,472 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 182 times [2021-03-10 22:32:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:55,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960725772] [2021-03-10 22:32:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960725772] [2021-03-10 22:32:55,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534895423] [2021-03-10 22:32:55,724 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:55,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:32:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:56,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:56,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:56,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998097018] [2021-03-10 22:32:56,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:56,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:56,363 INFO L87 Difference]: Start difference. First operand 2228 states and 5545 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:57,246 INFO L93 Difference]: Finished difference Result 2450 states and 6084 transitions. [2021-03-10 22:32:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:32:57,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:57,249 INFO L225 Difference]: With dead ends: 2450 [2021-03-10 22:32:57,249 INFO L226 Difference]: Without dead ends: 2428 [2021-03-10 22:32:57,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1410.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:32:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-03-10 22:32:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2220. [2021-03-10 22:32:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.4898602974312753) internal successors, (5525), 2219 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 5525 transitions. [2021-03-10 22:32:57,271 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 5525 transitions. Word has length 32 [2021-03-10 22:32:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:57,271 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 5525 transitions. [2021-03-10 22:32:57,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:57,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 5525 transitions. [2021-03-10 22:32:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:57,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:57,272 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:57,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:57,475 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 183 times [2021-03-10 22:32:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:57,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945139526] [2021-03-10 22:32:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:32:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:57,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945139526] [2021-03-10 22:32:57,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002186847] [2021-03-10 22:32:57,829 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:32:57,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 22:32:57,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:32:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:32:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:32:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:32:58,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:32:58,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:32:58,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418699231] [2021-03-10 22:32:58,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:32:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:32:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:32:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:32:58,225 INFO L87 Difference]: Start difference. First operand 2220 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:32:59,574 INFO L93 Difference]: Finished difference Result 2526 states and 6260 transitions. [2021-03-10 22:32:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:32:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:32:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:32:59,577 INFO L225 Difference]: With dead ends: 2526 [2021-03-10 22:32:59,577 INFO L226 Difference]: Without dead ends: 2480 [2021-03-10 22:32:59,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1874, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:32:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-03-10 22:32:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2296. [2021-03-10 22:32:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.4893246187363833) internal successors, (5713), 2295 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5713 transitions. [2021-03-10 22:32:59,595 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5713 transitions. Word has length 32 [2021-03-10 22:32:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:32:59,596 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 5713 transitions. [2021-03-10 22:32:59,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:32:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5713 transitions. [2021-03-10 22:32:59,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:32:59,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:32:59,597 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:32:59,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-03-10 22:32:59,803 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:32:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:32:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1646820354, now seen corresponding path program 184 times [2021-03-10 22:32:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:32:59,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285665509] [2021-03-10 22:32:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:32:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285665509] [2021-03-10 22:33:00,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786891496] [2021-03-10 22:33:00,094 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:00,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:00,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:00,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:00,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917318684] [2021-03-10 22:33:00,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:00,694 INFO L87 Difference]: Start difference. First operand 2296 states and 5713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:00,973 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:33:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:01,513 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-03-10 22:33:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:01,516 INFO L225 Difference]: With dead ends: 2486 [2021-03-10 22:33:01,516 INFO L226 Difference]: Without dead ends: 2456 [2021-03-10 22:33:01,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1374.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-03-10 22:33:01,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2304. [2021-03-10 22:33:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.4893617021276597) internal successors, (5733), 2303 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5733 transitions. [2021-03-10 22:33:01,536 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5733 transitions. Word has length 32 [2021-03-10 22:33:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:01,536 INFO L480 AbstractCegarLoop]: Abstraction has 2304 states and 5733 transitions. [2021-03-10 22:33:01,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5733 transitions. [2021-03-10 22:33:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:01,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:01,538 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:01,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2666 [2021-03-10 22:33:01,738 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash 391349374, now seen corresponding path program 185 times [2021-03-10 22:33:01,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:01,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836340195] [2021-03-10 22:33:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:01,913 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-03-10 22:33:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:01,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836340195] [2021-03-10 22:33:01,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26283508] [2021-03-10 22:33:01,990 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:02,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:33:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:02,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:02,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:02,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136606632] [2021-03-10 22:33:02,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:02,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:02,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:02,465 INFO L87 Difference]: Start difference. First operand 2304 states and 5733 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:03,049 INFO L93 Difference]: Finished difference Result 2430 states and 6024 transitions. [2021-03-10 22:33:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:33:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:03,052 INFO L225 Difference]: With dead ends: 2430 [2021-03-10 22:33:03,052 INFO L226 Difference]: Without dead ends: 2392 [2021-03-10 22:33:03,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 973.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:33:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-03-10 22:33:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2312. [2021-03-10 22:33:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.489398528775422) internal successors, (5753), 2311 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5753 transitions. [2021-03-10 22:33:03,071 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5753 transitions. Word has length 32 [2021-03-10 22:33:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:03,071 INFO L480 AbstractCegarLoop]: Abstraction has 2312 states and 5753 transitions. [2021-03-10 22:33:03,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5753 transitions. [2021-03-10 22:33:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:03,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:03,072 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:03,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-03-10 22:33:03,273 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 186 times [2021-03-10 22:33:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:03,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699809566] [2021-03-10 22:33:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:03,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699809566] [2021-03-10 22:33:03,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076052208] [2021-03-10 22:33:03,510 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:03,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:33:03,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:04,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:04,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:04,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727469503] [2021-03-10 22:33:04,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:04,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:04,092 INFO L87 Difference]: Start difference. First operand 2312 states and 5753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:04,911 INFO L93 Difference]: Finished difference Result 2590 states and 6424 transitions. [2021-03-10 22:33:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:04,914 INFO L225 Difference]: With dead ends: 2590 [2021-03-10 22:33:04,914 INFO L226 Difference]: Without dead ends: 2544 [2021-03-10 22:33:04,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1312.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-03-10 22:33:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2320. [2021-03-10 22:33:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.4894351013367833) internal successors, (5773), 2319 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5773 transitions. [2021-03-10 22:33:04,934 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5773 transitions. Word has length 32 [2021-03-10 22:33:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:04,934 INFO L480 AbstractCegarLoop]: Abstraction has 2320 states and 5773 transitions. [2021-03-10 22:33:04,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5773 transitions. [2021-03-10 22:33:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:04,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:04,936 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:05,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:05,136 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 187 times [2021-03-10 22:33:05,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:05,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439166431] [2021-03-10 22:33:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:05,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439166431] [2021-03-10 22:33:05,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18835375] [2021-03-10 22:33:05,304 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:05,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:05,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:05,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:05,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512826004] [2021-03-10 22:33:05,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:05,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:05,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:05,808 INFO L87 Difference]: Start difference. First operand 2320 states and 5773 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:06,838 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-03-10 22:33:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:33:06,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:06,841 INFO L225 Difference]: With dead ends: 2590 [2021-03-10 22:33:06,841 INFO L226 Difference]: Without dead ends: 2552 [2021-03-10 22:33:06,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1348.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:33:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-03-10 22:33:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2328. [2021-03-10 22:33:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4894714224323162) internal successors, (5793), 2327 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5793 transitions. [2021-03-10 22:33:06,860 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5793 transitions. Word has length 32 [2021-03-10 22:33:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:06,860 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 5793 transitions. [2021-03-10 22:33:06,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5793 transitions. [2021-03-10 22:33:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:06,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:06,861 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:07,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2721,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:07,062 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 188 times [2021-03-10 22:33:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:07,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572773678] [2021-03-10 22:33:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:07,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572773678] [2021-03-10 22:33:07,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911317878] [2021-03-10 22:33:07,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:07,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:07,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:07,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:07,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226202047] [2021-03-10 22:33:07,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:07,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:07,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:07,795 INFO L87 Difference]: Start difference. First operand 2328 states and 5793 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:08,618 INFO L93 Difference]: Finished difference Result 2574 states and 6388 transitions. [2021-03-10 22:33:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:08,621 INFO L225 Difference]: With dead ends: 2574 [2021-03-10 22:33:08,621 INFO L226 Difference]: Without dead ends: 2544 [2021-03-10 22:33:08,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1210.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-03-10 22:33:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2328. [2021-03-10 22:33:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4894714224323162) internal successors, (5793), 2327 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5793 transitions. [2021-03-10 22:33:08,640 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5793 transitions. Word has length 32 [2021-03-10 22:33:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:08,640 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 5793 transitions. [2021-03-10 22:33:08,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5793 transitions. [2021-03-10 22:33:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:08,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:08,642 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:08,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-03-10 22:33:08,843 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 189 times [2021-03-10 22:33:08,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:08,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288026355] [2021-03-10 22:33:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:09,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288026355] [2021-03-10 22:33:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791230170] [2021-03-10 22:33:09,070 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:09,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:33:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:09,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32743509] [2021-03-10 22:33:09,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:09,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:09,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:09,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:09,645 INFO L87 Difference]: Start difference. First operand 2328 states and 5793 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:10,429 INFO L93 Difference]: Finished difference Result 2550 states and 6328 transitions. [2021-03-10 22:33:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:33:10,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:10,432 INFO L225 Difference]: With dead ends: 2550 [2021-03-10 22:33:10,432 INFO L226 Difference]: Without dead ends: 2520 [2021-03-10 22:33:10,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1265.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:33:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-03-10 22:33:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2336. [2021-03-10 22:33:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.489507494646681) internal successors, (5813), 2335 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5813 transitions. [2021-03-10 22:33:10,456 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5813 transitions. Word has length 32 [2021-03-10 22:33:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:10,456 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 5813 transitions. [2021-03-10 22:33:10,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5813 transitions. [2021-03-10 22:33:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:10,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:10,458 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:10,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2764 [2021-03-10 22:33:10,658 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 190 times [2021-03-10 22:33:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:10,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999821207] [2021-03-10 22:33:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999821207] [2021-03-10 22:33:10,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418460523] [2021-03-10 22:33:10,912 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:10,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:11,379 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:33:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:11,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:11,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:11,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254632763] [2021-03-10 22:33:11,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:11,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:11,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:11,518 INFO L87 Difference]: Start difference. First operand 2336 states and 5813 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:12,496 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-03-10 22:33:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:12,499 INFO L225 Difference]: With dead ends: 2526 [2021-03-10 22:33:12,499 INFO L226 Difference]: Without dead ends: 2504 [2021-03-10 22:33:12,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1462.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-03-10 22:33:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2344. [2021-03-10 22:33:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 2.489543320529236) internal successors, (5833), 2343 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 5833 transitions. [2021-03-10 22:33:12,519 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 5833 transitions. Word has length 32 [2021-03-10 22:33:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:12,519 INFO L480 AbstractCegarLoop]: Abstraction has 2344 states and 5833 transitions. [2021-03-10 22:33:12,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 5833 transitions. [2021-03-10 22:33:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:12,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:12,521 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:12,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2785 [2021-03-10 22:33:12,721 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:12,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 191 times [2021-03-10 22:33:12,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:12,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367776850] [2021-03-10 22:33:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:13,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367776850] [2021-03-10 22:33:13,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686432154] [2021-03-10 22:33:13,017 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:13,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:33:13,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:13,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:33:13,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:13,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:13,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910772992] [2021-03-10 22:33:13,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:13,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:13,577 INFO L87 Difference]: Start difference. First operand 2344 states and 5833 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:14,251 INFO L93 Difference]: Finished difference Result 2550 states and 6332 transitions. [2021-03-10 22:33:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:33:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:14,253 INFO L225 Difference]: With dead ends: 2550 [2021-03-10 22:33:14,253 INFO L226 Difference]: Without dead ends: 2528 [2021-03-10 22:33:14,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:33:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-03-10 22:33:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2336. [2021-03-10 22:33:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.489507494646681) internal successors, (5813), 2335 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5813 transitions. [2021-03-10 22:33:14,273 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5813 transitions. Word has length 32 [2021-03-10 22:33:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:14,273 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 5813 transitions. [2021-03-10 22:33:14,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5813 transitions. [2021-03-10 22:33:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:14,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:14,275 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:14,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:14,475 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1300556614, now seen corresponding path program 192 times [2021-03-10 22:33:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:14,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133078130] [2021-03-10 22:33:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133078130] [2021-03-10 22:33:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424313121] [2021-03-10 22:33:14,652 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:14,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:33:14,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:15,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:15,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:15,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881158016] [2021-03-10 22:33:15,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:15,126 INFO L87 Difference]: Start difference. First operand 2336 states and 5813 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:16,090 INFO L93 Difference]: Finished difference Result 2494 states and 6184 transitions. [2021-03-10 22:33:16,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:33:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:16,092 INFO L225 Difference]: With dead ends: 2494 [2021-03-10 22:33:16,093 INFO L226 Difference]: Without dead ends: 2456 [2021-03-10 22:33:16,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:33:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-03-10 22:33:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2352. [2021-03-10 22:33:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4895789025946407) internal successors, (5853), 2351 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5853 transitions. [2021-03-10 22:33:16,113 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5853 transitions. Word has length 32 [2021-03-10 22:33:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:16,113 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 5853 transitions. [2021-03-10 22:33:16,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5853 transitions. [2021-03-10 22:33:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:16,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:16,115 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:16,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:16,315 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:16,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash 279565882, now seen corresponding path program 193 times [2021-03-10 22:33:16,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:16,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501207699] [2021-03-10 22:33:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501207699] [2021-03-10 22:33:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813812484] [2021-03-10 22:33:16,533 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:16,963 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:33:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:17,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:17,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887391558] [2021-03-10 22:33:17,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:17,105 INFO L87 Difference]: Start difference. First operand 2352 states and 5853 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:17,969 INFO L93 Difference]: Finished difference Result 2582 states and 6408 transitions. [2021-03-10 22:33:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:17,972 INFO L225 Difference]: With dead ends: 2582 [2021-03-10 22:33:17,972 INFO L226 Difference]: Without dead ends: 2544 [2021-03-10 22:33:17,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1303.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-03-10 22:33:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2352. [2021-03-10 22:33:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4895789025946407) internal successors, (5853), 2351 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5853 transitions. [2021-03-10 22:33:17,991 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5853 transitions. Word has length 32 [2021-03-10 22:33:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:17,992 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 5853 transitions. [2021-03-10 22:33:17,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5853 transitions. [2021-03-10 22:33:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:17,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:17,993 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:18,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2845 [2021-03-10 22:33:18,195 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1554708282, now seen corresponding path program 194 times [2021-03-10 22:33:18,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:18,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590473546] [2021-03-10 22:33:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:18,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590473546] [2021-03-10 22:33:18,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094599484] [2021-03-10 22:33:18,425 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:18,832 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:33:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821046659] [2021-03-10 22:33:19,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:19,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:19,001 INFO L87 Difference]: Start difference. First operand 2352 states and 5853 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:19,752 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-03-10 22:33:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:19,755 INFO L225 Difference]: With dead ends: 2526 [2021-03-10 22:33:19,755 INFO L226 Difference]: Without dead ends: 2488 [2021-03-10 22:33:19,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1187.3ms TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-03-10 22:33:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2368. [2021-03-10 22:33:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-03-10 22:33:19,778 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-03-10 22:33:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:19,778 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-03-10 22:33:19,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-03-10 22:33:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:19,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:19,780 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:19,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2868,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:19,981 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash -176061450, now seen corresponding path program 195 times [2021-03-10 22:33:19,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:19,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055208455] [2021-03-10 22:33:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:20,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055208455] [2021-03-10 22:33:20,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491213438] [2021-03-10 22:33:20,165 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:20,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:33:20,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:20,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:20,560 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:33:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:20,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:20,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324960931] [2021-03-10 22:33:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:20,691 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:21,377 INFO L93 Difference]: Finished difference Result 2494 states and 6192 transitions. [2021-03-10 22:33:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:33:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:21,380 INFO L225 Difference]: With dead ends: 2494 [2021-03-10 22:33:21,380 INFO L226 Difference]: Without dead ends: 2472 [2021-03-10 22:33:21,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1084.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:33:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-03-10 22:33:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2360. [2021-03-10 22:33:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.4896142433234423) internal successors, (5873), 2359 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5873 transitions. [2021-03-10 22:33:21,400 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5873 transitions. Word has length 32 [2021-03-10 22:33:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:21,400 INFO L480 AbstractCegarLoop]: Abstraction has 2360 states and 5873 transitions. [2021-03-10 22:33:21,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5873 transitions. [2021-03-10 22:33:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:21,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:21,402 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:21,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2897 [2021-03-10 22:33:21,602 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:21,603 INFO L82 PathProgramCache]: Analyzing trace with hash -381999882, now seen corresponding path program 196 times [2021-03-10 22:33:21,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:21,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410274940] [2021-03-10 22:33:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:21,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410274940] [2021-03-10 22:33:21,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630720740] [2021-03-10 22:33:21,943 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:21,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:33:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:22,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:22,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:22,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992716248] [2021-03-10 22:33:22,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:22,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:22,348 INFO L87 Difference]: Start difference. First operand 2360 states and 5873 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:22,909 INFO L93 Difference]: Finished difference Result 2534 states and 6284 transitions. [2021-03-10 22:33:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:22,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:22,912 INFO L225 Difference]: With dead ends: 2534 [2021-03-10 22:33:22,912 INFO L226 Difference]: Without dead ends: 2496 [2021-03-10 22:33:22,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-03-10 22:33:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2368. [2021-03-10 22:33:22,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-03-10 22:33:22,932 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-03-10 22:33:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:22,932 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-03-10 22:33:22,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-03-10 22:33:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:22,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:22,934 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:23,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2920,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:23,134 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:23,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 197 times [2021-03-10 22:33:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:23,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663306349] [2021-03-10 22:33:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663306349] [2021-03-10 22:33:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591101756] [2021-03-10 22:33:23,366 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:23,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:33:23,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:33:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:23,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:23,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:23,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367736471] [2021-03-10 22:33:23,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:23,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:23,717 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:24,227 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-03-10 22:33:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:33:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:24,229 INFO L225 Difference]: With dead ends: 2470 [2021-03-10 22:33:24,229 INFO L226 Difference]: Without dead ends: 2440 [2021-03-10 22:33:24,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:33:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-03-10 22:33:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2360. [2021-03-10 22:33:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.4896142433234423) internal successors, (5873), 2359 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5873 transitions. [2021-03-10 22:33:24,247 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5873 transitions. Word has length 32 [2021-03-10 22:33:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:24,247 INFO L480 AbstractCegarLoop]: Abstraction has 2360 states and 5873 transitions. [2021-03-10 22:33:24,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5873 transitions. [2021-03-10 22:33:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:24,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:24,249 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:24,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2935,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:24,450 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 198 times [2021-03-10 22:33:24,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:24,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318309230] [2021-03-10 22:33:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318309230] [2021-03-10 22:33:24,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462377047] [2021-03-10 22:33:24,658 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:24,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:33:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:25,067 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:33:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:25,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:25,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:25,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132451629] [2021-03-10 22:33:25,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:25,221 INFO L87 Difference]: Start difference. First operand 2360 states and 5873 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:26,025 INFO L93 Difference]: Finished difference Result 2558 states and 6352 transitions. [2021-03-10 22:33:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:26,028 INFO L225 Difference]: With dead ends: 2558 [2021-03-10 22:33:26,028 INFO L226 Difference]: Without dead ends: 2536 [2021-03-10 22:33:26,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-03-10 22:33:26,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2376. [2021-03-10 22:33:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.489684210526316) internal successors, (5913), 2375 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 5913 transitions. [2021-03-10 22:33:26,047 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 5913 transitions. Word has length 32 [2021-03-10 22:33:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:26,048 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 5913 transitions. [2021-03-10 22:33:26,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 5913 transitions. [2021-03-10 22:33:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:26,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:26,049 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:26,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:26,250 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 199 times [2021-03-10 22:33:26,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:26,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857319503] [2021-03-10 22:33:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857319503] [2021-03-10 22:33:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757649105] [2021-03-10 22:33:26,428 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:26,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:26,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:26,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535721593] [2021-03-10 22:33:26,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:26,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:26,935 INFO L87 Difference]: Start difference. First operand 2376 states and 5913 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:27,745 INFO L93 Difference]: Finished difference Result 2590 states and 6432 transitions. [2021-03-10 22:33:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:27,748 INFO L225 Difference]: With dead ends: 2590 [2021-03-10 22:33:27,748 INFO L226 Difference]: Without dead ends: 2568 [2021-03-10 22:33:27,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-03-10 22:33:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2368. [2021-03-10 22:33:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-03-10 22:33:27,777 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-03-10 22:33:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:27,777 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-03-10 22:33:27,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-03-10 22:33:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:27,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:27,778 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:27,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-03-10 22:33:27,979 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 200 times [2021-03-10 22:33:27,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:27,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338616221] [2021-03-10 22:33:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338616221] [2021-03-10 22:33:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56640811] [2021-03-10 22:33:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:28,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:28,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:28,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:28,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:28,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474689243] [2021-03-10 22:33:28,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:28,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:28,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:28,682 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:29,426 INFO L93 Difference]: Finished difference Result 2622 states and 6504 transitions. [2021-03-10 22:33:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:33:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:29,429 INFO L225 Difference]: With dead ends: 2622 [2021-03-10 22:33:29,429 INFO L226 Difference]: Without dead ends: 2584 [2021-03-10 22:33:29,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:33:29,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-03-10 22:33:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2392. [2021-03-10 22:33:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.4897532413216226) internal successors, (5953), 2391 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5953 transitions. [2021-03-10 22:33:29,449 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5953 transitions. Word has length 32 [2021-03-10 22:33:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:29,449 INFO L480 AbstractCegarLoop]: Abstraction has 2392 states and 5953 transitions. [2021-03-10 22:33:29,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5953 transitions. [2021-03-10 22:33:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:29,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:29,451 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:29,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2998 [2021-03-10 22:33:29,651 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 201 times [2021-03-10 22:33:29,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:29,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568479175] [2021-03-10 22:33:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:29,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568479175] [2021-03-10 22:33:29,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604740274] [2021-03-10 22:33:29,901 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:29,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:33:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:30,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:30,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:30,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506277734] [2021-03-10 22:33:30,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:30,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:30,487 INFO L87 Difference]: Start difference. First operand 2392 states and 5953 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:31,344 INFO L93 Difference]: Finished difference Result 2662 states and 6604 transitions. [2021-03-10 22:33:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:31,347 INFO L225 Difference]: With dead ends: 2662 [2021-03-10 22:33:31,347 INFO L226 Difference]: Without dead ends: 2624 [2021-03-10 22:33:31,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1263.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-03-10 22:33:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2384. [2021-03-10 22:33:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.4897188417960554) internal successors, (5933), 2383 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 5933 transitions. [2021-03-10 22:33:31,369 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 5933 transitions. Word has length 32 [2021-03-10 22:33:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:31,369 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 5933 transitions. [2021-03-10 22:33:31,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 5933 transitions. [2021-03-10 22:33:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:31,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:31,371 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:31,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3018,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:31,572 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 202 times [2021-03-10 22:33:31,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:31,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279692896] [2021-03-10 22:33:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:31,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279692896] [2021-03-10 22:33:31,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306493029] [2021-03-10 22:33:31,759 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:31,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:32,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:32,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:32,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475283534] [2021-03-10 22:33:32,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:32,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:32,347 INFO L87 Difference]: Start difference. First operand 2384 states and 5933 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:33,120 INFO L93 Difference]: Finished difference Result 2654 states and 6580 transitions. [2021-03-10 22:33:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:33:33,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:33,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:33,123 INFO L225 Difference]: With dead ends: 2654 [2021-03-10 22:33:33,123 INFO L226 Difference]: Without dead ends: 2608 [2021-03-10 22:33:33,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1206.8ms TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:33:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-03-10 22:33:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2408. [2021-03-10 22:33:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4898213543830496) internal successors, (5993), 2407 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5993 transitions. [2021-03-10 22:33:33,144 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5993 transitions. Word has length 32 [2021-03-10 22:33:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:33,144 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 5993 transitions. [2021-03-10 22:33:33,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5993 transitions. [2021-03-10 22:33:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:33,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:33,145 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:33,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:33,346 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:33,346 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 203 times [2021-03-10 22:33:33,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:33,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892034787] [2021-03-10 22:33:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:33,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892034787] [2021-03-10 22:33:33,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367710706] [2021-03-10 22:33:33,541 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:33,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:33:33,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:33,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:33,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:33,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991590794] [2021-03-10 22:33:33,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:33,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:33,981 INFO L87 Difference]: Start difference. First operand 2408 states and 5993 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:34,917 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-03-10 22:33:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:33:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:34,920 INFO L225 Difference]: With dead ends: 2598 [2021-03-10 22:33:34,920 INFO L226 Difference]: Without dead ends: 2568 [2021-03-10 22:33:34,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1137.7ms TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:33:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-03-10 22:33:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2400. [2021-03-10 22:33:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4897874114214256) internal successors, (5973), 2399 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5973 transitions. [2021-03-10 22:33:34,939 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5973 transitions. Word has length 32 [2021-03-10 22:33:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:34,939 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 5973 transitions. [2021-03-10 22:33:34,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5973 transitions. [2021-03-10 22:33:34,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:34,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:34,941 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:35,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3063 [2021-03-10 22:33:35,142 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 204 times [2021-03-10 22:33:35,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:35,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715519114] [2021-03-10 22:33:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:35,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715519114] [2021-03-10 22:33:35,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604724016] [2021-03-10 22:33:35,359 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:35,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:33:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:36,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:36,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:36,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118255347] [2021-03-10 22:33:36,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:36,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:36,014 INFO L87 Difference]: Start difference. First operand 2400 states and 5973 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:36,444 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:33:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:37,020 INFO L93 Difference]: Finished difference Result 2686 states and 6660 transitions. [2021-03-10 22:33:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:37,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:37,023 INFO L225 Difference]: With dead ends: 2686 [2021-03-10 22:33:37,023 INFO L226 Difference]: Without dead ends: 2640 [2021-03-10 22:33:37,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1508.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-03-10 22:33:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2400. [2021-03-10 22:33:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4897874114214256) internal successors, (5973), 2399 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5973 transitions. [2021-03-10 22:33:37,047 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5973 transitions. Word has length 32 [2021-03-10 22:33:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:37,047 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 5973 transitions. [2021-03-10 22:33:37,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5973 transitions. [2021-03-10 22:33:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:37,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:37,049 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:37,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3083,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:37,249 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 205 times [2021-03-10 22:33:37,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:37,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977564241] [2021-03-10 22:33:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:37,651 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 10 [2021-03-10 22:33:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977564241] [2021-03-10 22:33:37,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266841596] [2021-03-10 22:33:37,730 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:38,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:38,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600383645] [2021-03-10 22:33:38,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:38,187 INFO L87 Difference]: Start difference. First operand 2400 states and 5973 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:38,843 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-03-10 22:33:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:33:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:38,846 INFO L225 Difference]: With dead ends: 2558 [2021-03-10 22:33:38,846 INFO L226 Difference]: Without dead ends: 2520 [2021-03-10 22:33:38,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1027.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:33:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-03-10 22:33:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2416. [2021-03-10 22:33:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4898550724637682) internal successors, (6013), 2415 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6013 transitions. [2021-03-10 22:33:38,869 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6013 transitions. Word has length 32 [2021-03-10 22:33:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:38,869 INFO L480 AbstractCegarLoop]: Abstraction has 2416 states and 6013 transitions. [2021-03-10 22:33:38,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6013 transitions. [2021-03-10 22:33:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:38,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:38,871 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:39,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3108,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:39,072 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:39,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 206 times [2021-03-10 22:33:39,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:39,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560473509] [2021-03-10 22:33:39,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560473509] [2021-03-10 22:33:39,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458477434] [2021-03-10 22:33:39,510 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:39,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:39,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:40,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:40,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754664500] [2021-03-10 22:33:40,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:40,148 INFO L87 Difference]: Start difference. First operand 2416 states and 6013 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:41,148 INFO L93 Difference]: Finished difference Result 2662 states and 6604 transitions. [2021-03-10 22:33:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:41,151 INFO L225 Difference]: With dead ends: 2662 [2021-03-10 22:33:41,151 INFO L226 Difference]: Without dead ends: 2624 [2021-03-10 22:33:41,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1608.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:41,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-03-10 22:33:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2424. [2021-03-10 22:33:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.489888567891044) internal successors, (6033), 2423 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6033 transitions. [2021-03-10 22:33:41,176 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6033 transitions. Word has length 32 [2021-03-10 22:33:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:41,176 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6033 transitions. [2021-03-10 22:33:41,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6033 transitions. [2021-03-10 22:33:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:41,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:41,178 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:41,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3131,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:41,379 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 207 times [2021-03-10 22:33:41,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:41,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522351055] [2021-03-10 22:33:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:41,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522351055] [2021-03-10 22:33:41,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340713590] [2021-03-10 22:33:41,655 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:41,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:33:41,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:41,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:42,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:42,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117210048] [2021-03-10 22:33:42,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:42,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:42,189 INFO L87 Difference]: Start difference. First operand 2424 states and 6033 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:43,027 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-03-10 22:33:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:33:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:43,030 INFO L225 Difference]: With dead ends: 2702 [2021-03-10 22:33:43,030 INFO L226 Difference]: Without dead ends: 2672 [2021-03-10 22:33:43,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1254.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:33:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-03-10 22:33:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2392. [2021-03-10 22:33:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.4897532413216226) internal successors, (5953), 2391 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5953 transitions. [2021-03-10 22:33:43,053 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5953 transitions. Word has length 32 [2021-03-10 22:33:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:43,054 INFO L480 AbstractCegarLoop]: Abstraction has 2392 states and 5953 transitions. [2021-03-10 22:33:43,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5953 transitions. [2021-03-10 22:33:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:43,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:43,055 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:43,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3148,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:43,256 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 208 times [2021-03-10 22:33:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:43,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935151196] [2021-03-10 22:33:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935151196] [2021-03-10 22:33:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829039107] [2021-03-10 22:33:43,491 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:43,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:43,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:44,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599123705] [2021-03-10 22:33:44,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:44,101 INFO L87 Difference]: Start difference. First operand 2392 states and 5953 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:44,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:44,914 INFO L93 Difference]: Finished difference Result 2654 states and 6584 transitions. [2021-03-10 22:33:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:33:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:44,917 INFO L225 Difference]: With dead ends: 2654 [2021-03-10 22:33:44,917 INFO L226 Difference]: Without dead ends: 2616 [2021-03-10 22:33:44,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1334.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:33:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-03-10 22:33:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-03-10 22:33:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4898213543830496) internal successors, (5993), 2407 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5993 transitions. [2021-03-10 22:33:44,940 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5993 transitions. Word has length 32 [2021-03-10 22:33:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:44,940 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 5993 transitions. [2021-03-10 22:33:44,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5993 transitions. [2021-03-10 22:33:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:44,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:44,941 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:45,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3164 [2021-03-10 22:33:45,142 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 209 times [2021-03-10 22:33:45,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:45,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963906601] [2021-03-10 22:33:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963906601] [2021-03-10 22:33:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840097534] [2021-03-10 22:33:45,346 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:45,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:33:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:45,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:45,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:45,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014706776] [2021-03-10 22:33:45,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:45,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:45,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:45,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:45,880 INFO L87 Difference]: Start difference. First operand 2408 states and 5993 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:46,924 INFO L93 Difference]: Finished difference Result 2726 states and 6764 transitions. [2021-03-10 22:33:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:33:46,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:46,927 INFO L225 Difference]: With dead ends: 2726 [2021-03-10 22:33:46,927 INFO L226 Difference]: Without dead ends: 2688 [2021-03-10 22:33:46,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1409.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-03-10 22:33:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2416. [2021-03-10 22:33:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4898550724637682) internal successors, (6013), 2415 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6013 transitions. [2021-03-10 22:33:46,949 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6013 transitions. Word has length 32 [2021-03-10 22:33:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:46,949 INFO L480 AbstractCegarLoop]: Abstraction has 2416 states and 6013 transitions. [2021-03-10 22:33:46,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6013 transitions. [2021-03-10 22:33:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:46,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:46,951 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:47,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3177 [2021-03-10 22:33:47,151 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 210 times [2021-03-10 22:33:47,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:47,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125325129] [2021-03-10 22:33:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:47,345 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-03-10 22:33:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125325129] [2021-03-10 22:33:47,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616223635] [2021-03-10 22:33:47,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:47,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:33:47,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:48,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:48,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:48,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891466003] [2021-03-10 22:33:48,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:48,026 INFO L87 Difference]: Start difference. First operand 2416 states and 6013 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:48,996 INFO L93 Difference]: Finished difference Result 2766 states and 6868 transitions. [2021-03-10 22:33:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:33:48,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:49,000 INFO L225 Difference]: With dead ends: 2766 [2021-03-10 22:33:49,000 INFO L226 Difference]: Without dead ends: 2736 [2021-03-10 22:33:49,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1475.5ms TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:33:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-03-10 22:33:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2440. [2021-03-10 22:33:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4899548995489953) internal successors, (6073), 2439 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6073 transitions. [2021-03-10 22:33:49,025 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6073 transitions. Word has length 32 [2021-03-10 22:33:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:49,025 INFO L480 AbstractCegarLoop]: Abstraction has 2440 states and 6073 transitions. [2021-03-10 22:33:49,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6073 transitions. [2021-03-10 22:33:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:49,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:49,027 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:49,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3197 [2021-03-10 22:33:49,227 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 211 times [2021-03-10 22:33:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:49,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519655735] [2021-03-10 22:33:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:49,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519655735] [2021-03-10 22:33:49,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191354671] [2021-03-10 22:33:49,513 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:50,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:50,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:50,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249926356] [2021-03-10 22:33:50,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:50,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:50,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:50,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:50,135 INFO L87 Difference]: Start difference. First operand 2440 states and 6073 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:50,537 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 22:33:50,860 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 22:33:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:51,151 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-03-10 22:33:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:33:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:51,155 INFO L225 Difference]: With dead ends: 2622 [2021-03-10 22:33:51,155 INFO L226 Difference]: Without dead ends: 2600 [2021-03-10 22:33:51,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1570.6ms TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:33:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-03-10 22:33:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2432. [2021-03-10 22:33:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.489921842863019) internal successors, (6053), 2431 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6053 transitions. [2021-03-10 22:33:51,175 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6053 transitions. Word has length 32 [2021-03-10 22:33:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:51,175 INFO L480 AbstractCegarLoop]: Abstraction has 2432 states and 6053 transitions. [2021-03-10 22:33:51,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6053 transitions. [2021-03-10 22:33:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:51,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:51,177 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:51,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:51,377 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 212 times [2021-03-10 22:33:51,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:51,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300074896] [2021-03-10 22:33:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300074896] [2021-03-10 22:33:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299049397] [2021-03-10 22:33:51,583 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:51,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:33:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:52,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:52,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:52,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459407384] [2021-03-10 22:33:52,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:52,243 INFO L87 Difference]: Start difference. First operand 2432 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:52,717 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 22:33:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:53,289 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-03-10 22:33:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:53,293 INFO L225 Difference]: With dead ends: 2718 [2021-03-10 22:33:53,293 INFO L226 Difference]: Without dead ends: 2680 [2021-03-10 22:33:53,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1509.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-10 22:33:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2440. [2021-03-10 22:33:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4899548995489953) internal successors, (6073), 2439 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6073 transitions. [2021-03-10 22:33:53,315 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6073 transitions. Word has length 32 [2021-03-10 22:33:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:53,315 INFO L480 AbstractCegarLoop]: Abstraction has 2440 states and 6073 transitions. [2021-03-10 22:33:53,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6073 transitions. [2021-03-10 22:33:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:53,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:53,317 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:53,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3237 [2021-03-10 22:33:53,517 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 213 times [2021-03-10 22:33:53,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:53,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975060518] [2021-03-10 22:33:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:53,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975060518] [2021-03-10 22:33:53,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226802259] [2021-03-10 22:33:53,945 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:53,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:33:53,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:54,454 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:33:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:54,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:54,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564146954] [2021-03-10 22:33:54,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:54,590 INFO L87 Difference]: Start difference. First operand 2440 states and 6073 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:55,023 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 22:33:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:55,429 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-03-10 22:33:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:33:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:55,432 INFO L225 Difference]: With dead ends: 2646 [2021-03-10 22:33:55,432 INFO L226 Difference]: Without dead ends: 2624 [2021-03-10 22:33:55,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1536.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:33:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-03-10 22:33:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2432. [2021-03-10 22:33:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.489921842863019) internal successors, (6053), 2431 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6053 transitions. [2021-03-10 22:33:55,452 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6053 transitions. Word has length 32 [2021-03-10 22:33:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:55,452 INFO L480 AbstractCegarLoop]: Abstraction has 2432 states and 6053 transitions. [2021-03-10 22:33:55,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6053 transitions. [2021-03-10 22:33:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:55,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:55,454 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:55,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-03-10 22:33:55,654 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash 724018430, now seen corresponding path program 214 times [2021-03-10 22:33:55,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:55,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064805714] [2021-03-10 22:33:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:56,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064805714] [2021-03-10 22:33:56,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928791450] [2021-03-10 22:33:56,177 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:56,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:33:56,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:56,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:56,601 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 22:33:56,744 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-10 22:33:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:56,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:56,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:56,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134665361] [2021-03-10 22:33:56,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:56,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:56,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:56,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:56,882 INFO L87 Difference]: Start difference. First operand 2432 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:57,216 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-10 22:33:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:33:57,921 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-03-10 22:33:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:33:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:33:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:33:57,924 INFO L225 Difference]: With dead ends: 2718 [2021-03-10 22:33:57,924 INFO L226 Difference]: Without dead ends: 2680 [2021-03-10 22:33:57,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1617.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:33:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-10 22:33:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2464. [2021-03-10 22:33:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 2.4900527811611854) internal successors, (6133), 2463 states have internal predecessors, (6133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 6133 transitions. [2021-03-10 22:33:57,950 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 6133 transitions. Word has length 32 [2021-03-10 22:33:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:33:57,950 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 6133 transitions. [2021-03-10 22:33:57,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:33:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 6133 transitions. [2021-03-10 22:33:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:33:57,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:33:57,954 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:33:58,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:58,154 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:33:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:33:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash 367432762, now seen corresponding path program 215 times [2021-03-10 22:33:58,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:33:58,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044060367] [2021-03-10 22:33:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:33:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:33:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044060367] [2021-03-10 22:33:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139626445] [2021-03-10 22:33:58,466 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:33:58,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:33:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:33:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:33:58,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:33:58,951 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:33:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:33:59,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:33:59,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:33:59,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361092214] [2021-03-10 22:33:59,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:33:59,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:33:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:33:59,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:33:59,113 INFO L87 Difference]: Start difference. First operand 2464 states and 6133 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:00,075 INFO L93 Difference]: Finished difference Result 2630 states and 6524 transitions. [2021-03-10 22:34:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:34:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:00,078 INFO L225 Difference]: With dead ends: 2630 [2021-03-10 22:34:00,078 INFO L226 Difference]: Without dead ends: 2592 [2021-03-10 22:34:00,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1496.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:34:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-03-10 22:34:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2472. [2021-03-10 22:34:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-03-10 22:34:00,101 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-03-10 22:34:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:00,101 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-03-10 22:34:00,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-03-10 22:34:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:00,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:00,103 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:00,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-03-10 22:34:00,303 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1363336970, now seen corresponding path program 216 times [2021-03-10 22:34:00,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:00,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932940728] [2021-03-10 22:34:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932940728] [2021-03-10 22:34:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277604959] [2021-03-10 22:34:00,545 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:00,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:34:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:00,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:01,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:01,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:01,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200615611] [2021-03-10 22:34:01,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:01,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:01,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:01,135 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:01,942 INFO L93 Difference]: Finished difference Result 2590 states and 6432 transitions. [2021-03-10 22:34:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:01,945 INFO L225 Difference]: With dead ends: 2590 [2021-03-10 22:34:01,945 INFO L226 Difference]: Without dead ends: 2568 [2021-03-10 22:34:01,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:34:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-03-10 22:34:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2472. [2021-03-10 22:34:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-03-10 22:34:01,969 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-03-10 22:34:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:01,970 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-03-10 22:34:01,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-03-10 22:34:01,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:01,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:01,972 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:02,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:02,178 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1660823294, now seen corresponding path program 217 times [2021-03-10 22:34:02,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:02,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352762771] [2021-03-10 22:34:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:02,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352762771] [2021-03-10 22:34:02,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393432980] [2021-03-10 22:34:02,509 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:02,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:03,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:03,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:03,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317617109] [2021-03-10 22:34:03,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:03,123 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:03,741 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-03-10 22:34:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:04,069 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-03-10 22:34:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:04,072 INFO L225 Difference]: With dead ends: 2710 [2021-03-10 22:34:04,072 INFO L226 Difference]: Without dead ends: 2680 [2021-03-10 22:34:04,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1462.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:34:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-10 22:34:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2488. [2021-03-10 22:34:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4901487736228387) internal successors, (6193), 2487 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6193 transitions. [2021-03-10 22:34:04,094 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6193 transitions. Word has length 32 [2021-03-10 22:34:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:04,094 INFO L480 AbstractCegarLoop]: Abstraction has 2488 states and 6193 transitions. [2021-03-10 22:34:04,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6193 transitions. [2021-03-10 22:34:04,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:04,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:04,096 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:04,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:04,297 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 218 times [2021-03-10 22:34:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:04,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752851988] [2021-03-10 22:34:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:04,838 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-10 22:34:05,425 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-03-10 22:34:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752851988] [2021-03-10 22:34:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956969728] [2021-03-10 22:34:05,582 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:05,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:05,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:06,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:06,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:06,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306827546] [2021-03-10 22:34:06,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:06,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:06,183 INFO L87 Difference]: Start difference. First operand 2488 states and 6193 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:07,343 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-03-10 22:34:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:34:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:07,346 INFO L225 Difference]: With dead ends: 2718 [2021-03-10 22:34:07,346 INFO L226 Difference]: Without dead ends: 2688 [2021-03-10 22:34:07,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1703.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:34:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-03-10 22:34:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2480. [2021-03-10 22:34:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.490116982654296) internal successors, (6173), 2479 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6173 transitions. [2021-03-10 22:34:07,372 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6173 transitions. Word has length 32 [2021-03-10 22:34:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:07,372 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 6173 transitions. [2021-03-10 22:34:07,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6173 transitions. [2021-03-10 22:34:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:07,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:07,374 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:07,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:07,575 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 219 times [2021-03-10 22:34:07,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:07,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587386637] [2021-03-10 22:34:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587386637] [2021-03-10 22:34:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406814103] [2021-03-10 22:34:07,794 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:07,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:34:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:07,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:08,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:08,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:08,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533221515] [2021-03-10 22:34:08,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:08,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:08,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:08,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:08,416 INFO L87 Difference]: Start difference. First operand 2480 states and 6173 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:09,292 INFO L93 Difference]: Finished difference Result 2782 states and 6912 transitions. [2021-03-10 22:34:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:34:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:09,295 INFO L225 Difference]: With dead ends: 2782 [2021-03-10 22:34:09,295 INFO L226 Difference]: Without dead ends: 2752 [2021-03-10 22:34:09,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:34:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-03-10 22:34:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2472. [2021-03-10 22:34:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-03-10 22:34:09,317 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-03-10 22:34:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:09,318 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-03-10 22:34:09,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-03-10 22:34:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:09,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:09,319 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:09,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-03-10 22:34:09,520 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash -614222406, now seen corresponding path program 220 times [2021-03-10 22:34:09,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:09,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402978325] [2021-03-10 22:34:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:09,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402978325] [2021-03-10 22:34:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34884649] [2021-03-10 22:34:09,788 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:09,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:34:09,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:10,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029287288] [2021-03-10 22:34:10,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:10,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:10,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:10,315 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:11,668 INFO L93 Difference]: Finished difference Result 2814 states and 6988 transitions. [2021-03-10 22:34:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:34:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:11,671 INFO L225 Difference]: With dead ends: 2814 [2021-03-10 22:34:11,671 INFO L226 Difference]: Without dead ends: 2784 [2021-03-10 22:34:11,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1744.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:34:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-03-10 22:34:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2472. [2021-03-10 22:34:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-03-10 22:34:11,692 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-03-10 22:34:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:11,692 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-03-10 22:34:11,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-03-10 22:34:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:11,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:11,694 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:11,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:11,894 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 221 times [2021-03-10 22:34:11,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:11,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630138099] [2021-03-10 22:34:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630138099] [2021-03-10 22:34:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367635006] [2021-03-10 22:34:12,285 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:12,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:34:12,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:12,811 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:34:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:12,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:12,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:12,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204084664] [2021-03-10 22:34:12,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:12,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:12,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:12,968 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:14,170 INFO L93 Difference]: Finished difference Result 2790 states and 6928 transitions. [2021-03-10 22:34:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:34:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:14,173 INFO L225 Difference]: With dead ends: 2790 [2021-03-10 22:34:14,173 INFO L226 Difference]: Without dead ends: 2760 [2021-03-10 22:34:14,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1829.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:34:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-03-10 22:34:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2480. [2021-03-10 22:34:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.490116982654296) internal successors, (6173), 2479 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6173 transitions. [2021-03-10 22:34:14,196 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6173 transitions. Word has length 32 [2021-03-10 22:34:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:14,196 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 6173 transitions. [2021-03-10 22:34:14,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6173 transitions. [2021-03-10 22:34:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:14,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:14,209 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:14,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3408,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:14,410 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -188856194, now seen corresponding path program 222 times [2021-03-10 22:34:14,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:14,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112638463] [2021-03-10 22:34:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:14,620 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2021-03-10 22:34:15,092 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 12 [2021-03-10 22:34:15,866 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2021-03-10 22:34:16,276 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 11 [2021-03-10 22:34:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:16,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112638463] [2021-03-10 22:34:16,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401650305] [2021-03-10 22:34:16,370 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:16,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:34:16,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:16,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:16,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:16,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215221708] [2021-03-10 22:34:16,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:16,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:16,872 INFO L87 Difference]: Start difference. First operand 2480 states and 6173 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:17,662 INFO L93 Difference]: Finished difference Result 2726 states and 6764 transitions. [2021-03-10 22:34:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:34:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:17,666 INFO L225 Difference]: With dead ends: 2726 [2021-03-10 22:34:17,666 INFO L226 Difference]: Without dead ends: 2688 [2021-03-10 22:34:17,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1112.5ms TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:34:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-03-10 22:34:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2504. [2021-03-10 22:34:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4902117459049142) internal successors, (6233), 2503 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6233 transitions. [2021-03-10 22:34:17,686 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6233 transitions. Word has length 32 [2021-03-10 22:34:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:17,686 INFO L480 AbstractCegarLoop]: Abstraction has 2504 states and 6233 transitions. [2021-03-10 22:34:17,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6233 transitions. [2021-03-10 22:34:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:17,688 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:17,688 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:17,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3432,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:17,888 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:17,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 223 times [2021-03-10 22:34:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:17,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861511175] [2021-03-10 22:34:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861511175] [2021-03-10 22:34:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540478773] [2021-03-10 22:34:18,155 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:18,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:18,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:18,619 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:34:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:18,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052088018] [2021-03-10 22:34:18,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:18,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:18,771 INFO L87 Difference]: Start difference. First operand 2504 states and 6233 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:19,784 INFO L93 Difference]: Finished difference Result 2742 states and 6800 transitions. [2021-03-10 22:34:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:34:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:19,787 INFO L225 Difference]: With dead ends: 2742 [2021-03-10 22:34:19,787 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 22:34:19,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1459.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:34:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 22:34:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2528. [2021-03-10 22:34:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-03-10 22:34:19,809 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-03-10 22:34:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:19,809 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-03-10 22:34:19,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-03-10 22:34:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:19,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:19,811 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:20,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3445,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:20,011 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash 919634934, now seen corresponding path program 224 times [2021-03-10 22:34:20,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:20,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117076281] [2021-03-10 22:34:20,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:20,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117076281] [2021-03-10 22:34:20,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981278804] [2021-03-10 22:34:20,287 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:20,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:20,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:20,772 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:34:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:20,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:20,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114930992] [2021-03-10 22:34:20,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:20,909 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:21,761 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-03-10 22:34:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:34:21,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:21,764 INFO L225 Difference]: With dead ends: 2718 [2021-03-10 22:34:21,764 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 22:34:21,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1365.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:34:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 22:34:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2520. [2021-03-10 22:34:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4902739182215163) internal successors, (6273), 2519 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6273 transitions. [2021-03-10 22:34:21,786 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6273 transitions. Word has length 32 [2021-03-10 22:34:21,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:21,786 INFO L480 AbstractCegarLoop]: Abstraction has 2520 states and 6273 transitions. [2021-03-10 22:34:21,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6273 transitions. [2021-03-10 22:34:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:21,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:21,788 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:21,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3469 [2021-03-10 22:34:21,988 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 225 times [2021-03-10 22:34:21,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:21,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84123560] [2021-03-10 22:34:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:22,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84123560] [2021-03-10 22:34:22,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375187127] [2021-03-10 22:34:22,252 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:22,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:34:22,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:22,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:22,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:22,672 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:34:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:22,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23042613] [2021-03-10 22:34:22,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:22,825 INFO L87 Difference]: Start difference. First operand 2520 states and 6273 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:23,712 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-03-10 22:34:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:34:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:23,715 INFO L225 Difference]: With dead ends: 2742 [2021-03-10 22:34:23,715 INFO L226 Difference]: Without dead ends: 2704 [2021-03-10 22:34:23,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1288.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:34:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-03-10 22:34:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2536. [2021-03-10 22:34:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 2.490335305719921) internal successors, (6313), 2535 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 6313 transitions. [2021-03-10 22:34:23,735 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 6313 transitions. Word has length 32 [2021-03-10 22:34:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:23,735 INFO L480 AbstractCegarLoop]: Abstraction has 2536 states and 6313 transitions. [2021-03-10 22:34:23,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 6313 transitions. [2021-03-10 22:34:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:23,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:23,737 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:23,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3486,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:23,938 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 226 times [2021-03-10 22:34:23,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:23,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889976484] [2021-03-10 22:34:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889976484] [2021-03-10 22:34:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016712340] [2021-03-10 22:34:24,236 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:24,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:34:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:24,674 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:34:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:24,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:24,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:24,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925679082] [2021-03-10 22:34:24,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:24,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:24,812 INFO L87 Difference]: Start difference. First operand 2536 states and 6313 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:25,680 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-03-10 22:34:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:34:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:25,683 INFO L225 Difference]: With dead ends: 2702 [2021-03-10 22:34:25,683 INFO L226 Difference]: Without dead ends: 2680 [2021-03-10 22:34:25,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1289.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:34:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-03-10 22:34:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2520. [2021-03-10 22:34:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4902739182215163) internal successors, (6273), 2519 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6273 transitions. [2021-03-10 22:34:25,704 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6273 transitions. Word has length 32 [2021-03-10 22:34:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:25,704 INFO L480 AbstractCegarLoop]: Abstraction has 2520 states and 6273 transitions. [2021-03-10 22:34:25,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6273 transitions. [2021-03-10 22:34:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:25,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:25,706 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:25,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:25,906 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 227 times [2021-03-10 22:34:25,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:25,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696987287] [2021-03-10 22:34:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:26,207 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-03-10 22:34:26,750 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 10 [2021-03-10 22:34:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696987287] [2021-03-10 22:34:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816435636] [2021-03-10 22:34:26,887 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:26,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:34:26,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:27,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:27,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:27,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615823035] [2021-03-10 22:34:27,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:27,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:27,353 INFO L87 Difference]: Start difference. First operand 2520 states and 6273 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:28,052 INFO L93 Difference]: Finished difference Result 2734 states and 6784 transitions. [2021-03-10 22:34:28,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:28,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:28,055 INFO L225 Difference]: With dead ends: 2734 [2021-03-10 22:34:28,055 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 22:34:28,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1038.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:34:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 22:34:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2528. [2021-03-10 22:34:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-03-10 22:34:28,080 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-03-10 22:34:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:28,080 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-03-10 22:34:28,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-03-10 22:34:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:28,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:28,082 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:28,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:28,283 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 228 times [2021-03-10 22:34:28,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:28,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949140419] [2021-03-10 22:34:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:28,747 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-10 22:34:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949140419] [2021-03-10 22:34:28,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674379508] [2021-03-10 22:34:28,940 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:28,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:34:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:29,357 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:34:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:29,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:29,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:29,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457565403] [2021-03-10 22:34:29,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:29,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:29,504 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:30,415 INFO L93 Difference]: Finished difference Result 2814 states and 6988 transitions. [2021-03-10 22:34:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:34:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:30,418 INFO L225 Difference]: With dead ends: 2814 [2021-03-10 22:34:30,418 INFO L226 Difference]: Without dead ends: 2784 [2021-03-10 22:34:30,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1347.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:34:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-03-10 22:34:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2512. [2021-03-10 22:34:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.490242931103146) internal successors, (6253), 2511 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 6253 transitions. [2021-03-10 22:34:30,447 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 6253 transitions. Word has length 32 [2021-03-10 22:34:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:30,447 INFO L480 AbstractCegarLoop]: Abstraction has 2512 states and 6253 transitions. [2021-03-10 22:34:30,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 6253 transitions. [2021-03-10 22:34:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:30,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:30,449 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:30,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3538 [2021-03-10 22:34:30,663 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash -726005898, now seen corresponding path program 229 times [2021-03-10 22:34:30,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:30,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639289448] [2021-03-10 22:34:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:30,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639289448] [2021-03-10 22:34:30,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928399475] [2021-03-10 22:34:30,858 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:34:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:31,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:31,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:31,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488741427] [2021-03-10 22:34:31,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:31,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:31,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:31,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:31,251 INFO L87 Difference]: Start difference. First operand 2512 states and 6253 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:31,780 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-03-10 22:34:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:34:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:31,783 INFO L225 Difference]: With dead ends: 2622 [2021-03-10 22:34:31,784 INFO L226 Difference]: Without dead ends: 2600 [2021-03-10 22:34:31,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:34:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-03-10 22:34:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2512. [2021-03-10 22:34:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.490242931103146) internal successors, (6253), 2511 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 6253 transitions. [2021-03-10 22:34:31,806 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 6253 transitions. Word has length 32 [2021-03-10 22:34:31,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:31,806 INFO L480 AbstractCegarLoop]: Abstraction has 2512 states and 6253 transitions. [2021-03-10 22:34:31,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 6253 transitions. [2021-03-10 22:34:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:31,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:31,808 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:32,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:32,008 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 230 times [2021-03-10 22:34:32,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:32,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059090418] [2021-03-10 22:34:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:32,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059090418] [2021-03-10 22:34:32,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126640576] [2021-03-10 22:34:32,203 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:32,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:34:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:32,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:32,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:32,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:32,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297052262] [2021-03-10 22:34:32,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:32,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:32,710 INFO L87 Difference]: Start difference. First operand 2512 states and 6253 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:33,501 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-03-10 22:34:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:34:33,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:33,504 INFO L225 Difference]: With dead ends: 2702 [2021-03-10 22:34:33,504 INFO L226 Difference]: Without dead ends: 2672 [2021-03-10 22:34:33,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:34:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-03-10 22:34:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2528. [2021-03-10 22:34:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-03-10 22:34:33,525 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-03-10 22:34:33,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:33,525 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-03-10 22:34:33,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-03-10 22:34:33,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:33,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:33,526 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:33,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-03-10 22:34:33,727 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:33,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:33,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1873094462, now seen corresponding path program 231 times [2021-03-10 22:34:33,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:33,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676863916] [2021-03-10 22:34:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:34,351 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-10 22:34:40,808 WARN L205 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-03-10 22:34:48,104 WARN L205 SmtUtils]: Spent 7.18 s on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2021-03-10 22:34:52,530 WARN L205 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-03-10 22:34:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676863916] [2021-03-10 22:34:52,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446174305] [2021-03-10 22:34:52,723 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:52,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:34:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:52,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:53,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:53,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926150234] [2021-03-10 22:34:53,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:53,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:53,282 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:54,609 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-03-10 22:34:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:34:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:54,612 INFO L225 Difference]: With dead ends: 2742 [2021-03-10 22:34:54,612 INFO L226 Difference]: Without dead ends: 2712 [2021-03-10 22:34:54,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1861.1ms TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:34:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-03-10 22:34:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2552. [2021-03-10 22:34:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.490395923167385) internal successors, (6353), 2551 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6353 transitions. [2021-03-10 22:34:54,633 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6353 transitions. Word has length 32 [2021-03-10 22:34:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:54,633 INFO L480 AbstractCegarLoop]: Abstraction has 2552 states and 6353 transitions. [2021-03-10 22:34:54,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6353 transitions. [2021-03-10 22:34:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:54,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:54,635 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:54,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:54,836 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash -663644998, now seen corresponding path program 232 times [2021-03-10 22:34:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:54,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192538399] [2021-03-10 22:34:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:55,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192538399] [2021-03-10 22:34:55,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759870855] [2021-03-10 22:34:55,093 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:55,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:34:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:55,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:55,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:55,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094477749] [2021-03-10 22:34:55,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:55,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:55,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:55,705 INFO L87 Difference]: Start difference. First operand 2552 states and 6353 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:56,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:56,967 INFO L93 Difference]: Finished difference Result 2846 states and 7064 transitions. [2021-03-10 22:34:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:34:56,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:56,970 INFO L225 Difference]: With dead ends: 2846 [2021-03-10 22:34:56,970 INFO L226 Difference]: Without dead ends: 2800 [2021-03-10 22:34:56,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1714.4ms TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:34:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-03-10 22:34:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2552. [2021-03-10 22:34:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.490395923167385) internal successors, (6353), 2551 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6353 transitions. [2021-03-10 22:34:56,992 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6353 transitions. Word has length 32 [2021-03-10 22:34:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:56,992 INFO L480 AbstractCegarLoop]: Abstraction has 2552 states and 6353 transitions. [2021-03-10 22:34:56,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6353 transitions. [2021-03-10 22:34:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:56,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:56,994 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:57,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-03-10 22:34:57,194 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:57,194 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 233 times [2021-03-10 22:34:57,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:57,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941486260] [2021-03-10 22:34:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:34:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:57,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941486260] [2021-03-10 22:34:57,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936785762] [2021-03-10 22:34:57,545 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:34:57,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:34:57,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:34:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:34:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:34:58,084 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:34:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:34:58,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:34:58,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:34:58,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495487849] [2021-03-10 22:34:58,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:34:58,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:34:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:34:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:34:58,253 INFO L87 Difference]: Start difference. First operand 2552 states and 6353 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:58,987 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 22:34:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:34:59,371 INFO L93 Difference]: Finished difference Result 2862 states and 7104 transitions. [2021-03-10 22:34:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:34:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:34:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:34:59,374 INFO L225 Difference]: With dead ends: 2862 [2021-03-10 22:34:59,374 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 22:34:59,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:34:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 22:34:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2568. [2021-03-10 22:34:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.490455784962992) internal successors, (6393), 2567 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6393 transitions. [2021-03-10 22:34:59,397 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6393 transitions. Word has length 32 [2021-03-10 22:34:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:34:59,397 INFO L480 AbstractCegarLoop]: Abstraction has 2568 states and 6393 transitions. [2021-03-10 22:34:59,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:34:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6393 transitions. [2021-03-10 22:34:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:34:59,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:34:59,399 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:34:59,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3626 [2021-03-10 22:34:59,599 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:34:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:34:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 234 times [2021-03-10 22:34:59,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:34:59,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987179190] [2021-03-10 22:34:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:34:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:00,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987179190] [2021-03-10 22:35:00,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984670855] [2021-03-10 22:35:00,072 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:00,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:35:00,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:00,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:00,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:00,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017444337] [2021-03-10 22:35:00,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:00,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:00,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:00,679 INFO L87 Difference]: Start difference. First operand 2568 states and 6393 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:01,184 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-03-10 22:35:01,631 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:35:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:02,075 INFO L93 Difference]: Finished difference Result 2870 states and 7124 transitions. [2021-03-10 22:35:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:35:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:02,078 INFO L225 Difference]: With dead ends: 2870 [2021-03-10 22:35:02,078 INFO L226 Difference]: Without dead ends: 2832 [2021-03-10 22:35:02,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1811.2ms TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:35:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-03-10 22:35:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2576. [2021-03-10 22:35:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.490485436893204) internal successors, (6413), 2575 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6413 transitions. [2021-03-10 22:35:02,104 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6413 transitions. Word has length 32 [2021-03-10 22:35:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:02,104 INFO L480 AbstractCegarLoop]: Abstraction has 2576 states and 6413 transitions. [2021-03-10 22:35:02,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6413 transitions. [2021-03-10 22:35:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:02,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:02,106 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:02,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3649,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:02,307 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 235 times [2021-03-10 22:35:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88927955] [2021-03-10 22:35:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:02,522 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-03-10 22:35:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88927955] [2021-03-10 22:35:02,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375460963] [2021-03-10 22:35:02,623 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:03,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:03,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:03,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461234227] [2021-03-10 22:35:03,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:03,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:03,217 INFO L87 Difference]: Start difference. First operand 2576 states and 6413 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:04,293 INFO L93 Difference]: Finished difference Result 2870 states and 7128 transitions. [2021-03-10 22:35:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:35:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:04,297 INFO L225 Difference]: With dead ends: 2870 [2021-03-10 22:35:04,297 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 22:35:04,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1538.1ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:35:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 22:35:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2584. [2021-03-10 22:35:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 2.4905149051490514) internal successors, (6433), 2583 states have internal predecessors, (6433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 6433 transitions. [2021-03-10 22:35:04,319 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 6433 transitions. Word has length 32 [2021-03-10 22:35:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:04,319 INFO L480 AbstractCegarLoop]: Abstraction has 2584 states and 6433 transitions. [2021-03-10 22:35:04,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 6433 transitions. [2021-03-10 22:35:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:04,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:04,321 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:04,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-03-10 22:35:04,521 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 236 times [2021-03-10 22:35:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:04,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200716289] [2021-03-10 22:35:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200716289] [2021-03-10 22:35:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891669947] [2021-03-10 22:35:05,070 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:05,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:35:05,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:05,617 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 22:35:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:05,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:05,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:05,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54961836] [2021-03-10 22:35:05,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:05,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:05,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:05,762 INFO L87 Difference]: Start difference. First operand 2584 states and 6433 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:05,944 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-03-10 22:35:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:06,778 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-03-10 22:35:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:35:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:06,781 INFO L225 Difference]: With dead ends: 2822 [2021-03-10 22:35:06,781 INFO L226 Difference]: Without dead ends: 2792 [2021-03-10 22:35:06,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1669.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:35:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-03-10 22:35:06,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2576. [2021-03-10 22:35:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.490485436893204) internal successors, (6413), 2575 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6413 transitions. [2021-03-10 22:35:06,804 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6413 transitions. Word has length 32 [2021-03-10 22:35:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:06,804 INFO L480 AbstractCegarLoop]: Abstraction has 2576 states and 6413 transitions. [2021-03-10 22:35:06,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6413 transitions. [2021-03-10 22:35:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:06,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:06,806 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:07,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3691 [2021-03-10 22:35:07,006 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 237 times [2021-03-10 22:35:07,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:07,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222617557] [2021-03-10 22:35:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:07,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222617557] [2021-03-10 22:35:07,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73438495] [2021-03-10 22:35:07,474 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:07,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:35:07,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:07,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:07,894 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:35:08,052 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:35:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:08,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:08,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:08,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228408289] [2021-03-10 22:35:08,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:08,208 INFO L87 Difference]: Start difference. First operand 2576 states and 6413 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:08,755 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 22:35:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:09,505 INFO L93 Difference]: Finished difference Result 2862 states and 7112 transitions. [2021-03-10 22:35:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:35:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:09,509 INFO L225 Difference]: With dead ends: 2862 [2021-03-10 22:35:09,509 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 22:35:09,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2062.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:35:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 22:35:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2592. [2021-03-10 22:35:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.4905441914318796) internal successors, (6453), 2591 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 6453 transitions. [2021-03-10 22:35:09,532 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 6453 transitions. Word has length 32 [2021-03-10 22:35:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:09,532 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 6453 transitions. [2021-03-10 22:35:09,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 6453 transitions. [2021-03-10 22:35:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:09,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:09,534 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:09,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3714,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:09,734 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:09,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:09,734 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 238 times [2021-03-10 22:35:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:09,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072878440] [2021-03-10 22:35:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:10,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072878440] [2021-03-10 22:35:10,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391142844] [2021-03-10 22:35:10,105 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:10,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:35:10,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:10,543 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:35:10,684 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:35:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:10,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:10,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656068661] [2021-03-10 22:35:10,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:10,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:10,829 INFO L87 Difference]: Start difference. First operand 2592 states and 6453 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:11,187 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 22:35:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:11,870 INFO L93 Difference]: Finished difference Result 2846 states and 7072 transitions. [2021-03-10 22:35:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:35:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:11,874 INFO L225 Difference]: With dead ends: 2846 [2021-03-10 22:35:11,874 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 22:35:11,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1743.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:35:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 22:35:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2592. [2021-03-10 22:35:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.4905441914318796) internal successors, (6453), 2591 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 6453 transitions. [2021-03-10 22:35:11,895 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 6453 transitions. Word has length 32 [2021-03-10 22:35:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:11,896 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 6453 transitions. [2021-03-10 22:35:11,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:11,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 6453 transitions. [2021-03-10 22:35:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:11,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:11,897 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:12,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-03-10 22:35:12,107 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 239 times [2021-03-10 22:35:12,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:12,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726487963] [2021-03-10 22:35:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:12,913 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 12 [2021-03-10 22:35:13,908 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2021-03-10 22:35:16,329 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2021-03-10 22:35:17,206 WARN L205 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 13 [2021-03-10 22:35:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:17,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726487963] [2021-03-10 22:35:17,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932925717] [2021-03-10 22:35:17,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:17,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 22:35:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:17,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:17,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659040963] [2021-03-10 22:35:17,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:17,846 INFO L87 Difference]: Start difference. First operand 2592 states and 6453 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:18,676 INFO L93 Difference]: Finished difference Result 2830 states and 7024 transitions. [2021-03-10 22:35:18,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:35:18,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:18,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:18,680 INFO L225 Difference]: With dead ends: 2830 [2021-03-10 22:35:18,680 INFO L226 Difference]: Without dead ends: 2792 [2021-03-10 22:35:18,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1248.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:35:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-03-10 22:35:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2608. [2021-03-10 22:35:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 2.49060222477944) internal successors, (6493), 2607 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 6493 transitions. [2021-03-10 22:35:18,700 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 6493 transitions. Word has length 32 [2021-03-10 22:35:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:18,700 INFO L480 AbstractCegarLoop]: Abstraction has 2608 states and 6493 transitions. [2021-03-10 22:35:18,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:18,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 6493 transitions. [2021-03-10 22:35:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:18,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:18,702 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:18,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3749,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:18,903 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 240 times [2021-03-10 22:35:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:18,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820785717] [2021-03-10 22:35:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:19,276 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 12 [2021-03-10 22:35:19,615 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-03-10 22:35:20,239 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-03-10 22:35:20,837 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 14 [2021-03-10 22:35:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:20,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820785717] [2021-03-10 22:35:20,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870042057] [2021-03-10 22:35:20,922 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:20,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 22:35:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:35:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:21,392 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:35:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:21,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:21,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331543440] [2021-03-10 22:35:21,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:21,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:21,531 INFO L87 Difference]: Start difference. First operand 2608 states and 6493 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:22,437 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-03-10 22:35:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:35:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:22,440 INFO L225 Difference]: With dead ends: 2782 [2021-03-10 22:35:22,440 INFO L226 Difference]: Without dead ends: 2752 [2021-03-10 22:35:22,440 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1263.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:35:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-03-10 22:35:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2616. [2021-03-10 22:35:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4906309751434033) internal successors, (6513), 2615 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6513 transitions. [2021-03-10 22:35:22,468 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6513 transitions. Word has length 32 [2021-03-10 22:35:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:22,468 INFO L480 AbstractCegarLoop]: Abstraction has 2616 states and 6513 transitions. [2021-03-10 22:35:22,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6513 transitions. [2021-03-10 22:35:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:22,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:22,470 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:22,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3766,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:22,670 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 241 times [2021-03-10 22:35:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:22,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791732029] [2021-03-10 22:35:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:22,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791732029] [2021-03-10 22:35:22,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195827873] [2021-03-10 22:35:22,890 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:35:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:35:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:35:23,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:35:23,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:35:23,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207155849] [2021-03-10 22:35:23,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:35:23,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:35:23,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:35:23,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:35:23,430 INFO L87 Difference]: Start difference. First operand 2616 states and 6513 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:35:24,772 INFO L93 Difference]: Finished difference Result 2894 states and 7188 transitions. [2021-03-10 22:35:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:35:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:35:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:35:24,776 INFO L225 Difference]: With dead ends: 2894 [2021-03-10 22:35:24,776 INFO L226 Difference]: Without dead ends: 2864 [2021-03-10 22:35:24,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1644.2ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:35:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-03-10 22:35:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2624. [2021-03-10 22:35:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.490659550133435) internal successors, (6533), 2623 states have internal predecessors, (6533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6533 transitions. [2021-03-10 22:35:24,797 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6533 transitions. Word has length 32 [2021-03-10 22:35:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:35:24,797 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 6533 transitions. [2021-03-10 22:35:24,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:35:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6533 transitions. [2021-03-10 22:35:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:35:24,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:35:24,799 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:35:25,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:35:25,007 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:35:25,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:35:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1601078774, now seen corresponding path program 242 times [2021-03-10 22:35:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:35:25,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34754195] [2021-03-10 22:35:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:35:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:35:38,575 WARN L205 SmtUtils]: Spent 13.51 s on a formula simplification. DAG size of input: 63 DAG size of output: 15 [2021-03-10 22:36:30,486 WARN L205 SmtUtils]: Spent 51.88 s on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2021-03-10 22:38:12,744 WARN L205 SmtUtils]: Spent 1.70 m on a formula simplification. DAG size of input: 83 DAG size of output: 28 [2021-03-10 22:38:20,117 WARN L205 SmtUtils]: Spent 7.28 s on a formula simplification. DAG size of input: 69 DAG size of output: 10 [2021-03-10 22:38:20,520 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 3 [2021-03-10 22:38:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34754195] [2021-03-10 22:38:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116819595] [2021-03-10 22:38:20,554 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:20,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:38:20,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:20,960 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:38:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:21,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:21,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:21,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909441054] [2021-03-10 22:38:21,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:21,210 INFO L87 Difference]: Start difference. First operand 2624 states and 6533 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:22,284 INFO L93 Difference]: Finished difference Result 2870 states and 7132 transitions. [2021-03-10 22:38:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:38:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:22,288 INFO L225 Difference]: With dead ends: 2870 [2021-03-10 22:38:22,288 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 22:38:22,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1540.1ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:38:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 22:38:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2632. [2021-03-10 22:38:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.490687951349297) internal successors, (6553), 2631 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6553 transitions. [2021-03-10 22:38:22,313 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6553 transitions. Word has length 32 [2021-03-10 22:38:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:22,313 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6553 transitions. [2021-03-10 22:38:22,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6553 transitions. [2021-03-10 22:38:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:22,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:22,315 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:22,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3806 [2021-03-10 22:38:22,516 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 243 times [2021-03-10 22:38:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:22,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331450311] [2021-03-10 22:38:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:22,787 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-03-10 22:38:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:22,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331450311] [2021-03-10 22:38:22,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801782857] [2021-03-10 22:38:22,904 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:22,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:38:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:23,417 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:38:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:23,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:23,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:23,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568934066] [2021-03-10 22:38:23,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:23,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:23,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:23,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:23,585 INFO L87 Difference]: Start difference. First operand 2632 states and 6553 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:24,831 INFO L93 Difference]: Finished difference Result 2958 states and 7340 transitions. [2021-03-10 22:38:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:38:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:24,835 INFO L225 Difference]: With dead ends: 2958 [2021-03-10 22:38:24,835 INFO L226 Difference]: Without dead ends: 2912 [2021-03-10 22:38:24,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1847.4ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:38:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-03-10 22:38:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2632. [2021-03-10 22:38:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.490687951349297) internal successors, (6553), 2631 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6553 transitions. [2021-03-10 22:38:24,862 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6553 transitions. Word has length 32 [2021-03-10 22:38:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:24,862 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6553 transitions. [2021-03-10 22:38:24,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6553 transitions. [2021-03-10 22:38:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:24,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:24,865 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:25,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-03-10 22:38:25,065 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash 161376374, now seen corresponding path program 244 times [2021-03-10 22:38:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:25,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959544559] [2021-03-10 22:38:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:25,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959544559] [2021-03-10 22:38:25,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796495975] [2021-03-10 22:38:25,295 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:25,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:38:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:25,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:25,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:25,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518890522] [2021-03-10 22:38:25,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:25,896 INFO L87 Difference]: Start difference. First operand 2632 states and 6553 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:26,913 INFO L93 Difference]: Finished difference Result 2734 states and 6788 transitions. [2021-03-10 22:38:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:38:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:26,916 INFO L225 Difference]: With dead ends: 2734 [2021-03-10 22:38:26,916 INFO L226 Difference]: Without dead ends: 2704 [2021-03-10 22:38:26,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1381.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 22:38:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-03-10 22:38:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2640. [2021-03-10 22:38:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.490716180371353) internal successors, (6573), 2639 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6573 transitions. [2021-03-10 22:38:26,937 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6573 transitions. Word has length 32 [2021-03-10 22:38:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:26,938 INFO L480 AbstractCegarLoop]: Abstraction has 2640 states and 6573 transitions. [2021-03-10 22:38:26,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6573 transitions. [2021-03-10 22:38:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:26,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:26,939 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:27,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:27,140 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 245 times [2021-03-10 22:38:27,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:27,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230748452] [2021-03-10 22:38:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:31,296 WARN L205 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-03-10 22:38:37,838 WARN L205 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2021-03-10 22:38:44,938 WARN L205 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2021-03-10 22:38:49,530 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-03-10 22:38:49,658 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 15 [2021-03-10 22:38:50,015 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 9 [2021-03-10 22:38:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230748452] [2021-03-10 22:38:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241296703] [2021-03-10 22:38:50,061 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:50,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:38:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:50,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:50,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:50,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259368776] [2021-03-10 22:38:50,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:50,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:50,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:50,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:50,710 INFO L87 Difference]: Start difference. First operand 2640 states and 6573 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:51,745 INFO L93 Difference]: Finished difference Result 2854 states and 7088 transitions. [2021-03-10 22:38:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:38:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:51,749 INFO L225 Difference]: With dead ends: 2854 [2021-03-10 22:38:51,749 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 22:38:51,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1722.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:38:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 22:38:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2648. [2021-03-10 22:38:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.490744238760861) internal successors, (6593), 2647 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6593 transitions. [2021-03-10 22:38:51,772 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6593 transitions. Word has length 32 [2021-03-10 22:38:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:51,773 INFO L480 AbstractCegarLoop]: Abstraction has 2648 states and 6593 transitions. [2021-03-10 22:38:51,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6593 transitions. [2021-03-10 22:38:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:51,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:51,775 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:51,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3869 [2021-03-10 22:38:51,975 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:51,975 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 246 times [2021-03-10 22:38:51,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:51,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016757222] [2021-03-10 22:38:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:52,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016757222] [2021-03-10 22:38:52,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467219612] [2021-03-10 22:38:52,296 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:52,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:38:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:52,921 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:38:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:53,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:53,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737804167] [2021-03-10 22:38:53,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:53,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:53,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:53,143 INFO L87 Difference]: Start difference. First operand 2648 states and 6593 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:54,221 INFO L93 Difference]: Finished difference Result 2862 states and 7104 transitions. [2021-03-10 22:38:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:38:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:54,225 INFO L225 Difference]: With dead ends: 2862 [2021-03-10 22:38:54,225 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 22:38:54,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1685.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:38:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 22:38:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2672. [2021-03-10 22:38:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 2.4908274054661175) internal successors, (6653), 2671 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 6653 transitions. [2021-03-10 22:38:54,247 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 6653 transitions. Word has length 32 [2021-03-10 22:38:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:54,247 INFO L480 AbstractCegarLoop]: Abstraction has 2672 states and 6653 transitions. [2021-03-10 22:38:54,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 6653 transitions. [2021-03-10 22:38:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:54,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:54,249 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:54,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:54,452 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 247 times [2021-03-10 22:38:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:54,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980742771] [2021-03-10 22:38:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:54,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980742771] [2021-03-10 22:38:54,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968032773] [2021-03-10 22:38:54,856 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:55,310 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:38:55,464 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:38:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:55,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:55,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:55,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921821716] [2021-03-10 22:38:55,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:55,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:55,641 INFO L87 Difference]: Start difference. First operand 2672 states and 6653 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:56,060 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-10 22:38:56,275 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2021-03-10 22:38:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:57,109 INFO L93 Difference]: Finished difference Result 3006 states and 7460 transitions. [2021-03-10 22:38:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:38:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:57,114 INFO L225 Difference]: With dead ends: 3006 [2021-03-10 22:38:57,114 INFO L226 Difference]: Without dead ends: 2960 [2021-03-10 22:38:57,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2109.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:38:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-03-10 22:38:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2688. [2021-03-10 22:38:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.4908820245627092) internal successors, (6693), 2687 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 6693 transitions. [2021-03-10 22:38:57,139 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 6693 transitions. Word has length 32 [2021-03-10 22:38:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:38:57,139 INFO L480 AbstractCegarLoop]: Abstraction has 2688 states and 6693 transitions. [2021-03-10 22:38:57,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 6693 transitions. [2021-03-10 22:38:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:38:57,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:38:57,141 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:38:57,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:57,347 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:38:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:38:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 248 times [2021-03-10 22:38:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:38:57,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96566950] [2021-03-10 22:38:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:38:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:38:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96566950] [2021-03-10 22:38:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671393697] [2021-03-10 22:38:57,832 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:38:57,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:38:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:38:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:38:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:38:58,321 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:38:58,514 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:38:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:38:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:38:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:38:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955662337] [2021-03-10 22:38:58,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:38:58,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:38:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:38:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:38:58,720 INFO L87 Difference]: Start difference. First operand 2688 states and 6693 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:38:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:38:59,975 INFO L93 Difference]: Finished difference Result 2918 states and 7252 transitions. [2021-03-10 22:38:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:38:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:38:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:38:59,979 INFO L225 Difference]: With dead ends: 2918 [2021-03-10 22:38:59,979 INFO L226 Difference]: Without dead ends: 2896 [2021-03-10 22:38:59,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1880.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:38:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-03-10 22:38:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2672. [2021-03-10 22:39:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 2.4908274054661175) internal successors, (6653), 2671 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 6653 transitions. [2021-03-10 22:39:00,003 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 6653 transitions. Word has length 32 [2021-03-10 22:39:00,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:00,003 INFO L480 AbstractCegarLoop]: Abstraction has 2672 states and 6653 transitions. [2021-03-10 22:39:00,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 6653 transitions. [2021-03-10 22:39:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:00,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:00,005 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:00,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-03-10 22:39:00,206 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1399331386, now seen corresponding path program 249 times [2021-03-10 22:39:00,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:00,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778388334] [2021-03-10 22:39:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:00,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778388334] [2021-03-10 22:39:00,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570409959] [2021-03-10 22:39:00,629 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:00,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 22:39:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:01,156 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:39:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:01,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:01,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436171211] [2021-03-10 22:39:01,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:01,375 INFO L87 Difference]: Start difference. First operand 2672 states and 6653 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:01,578 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:39:02,366 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:39:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:02,640 INFO L93 Difference]: Finished difference Result 2950 states and 7320 transitions. [2021-03-10 22:39:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:39:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:02,644 INFO L225 Difference]: With dead ends: 2950 [2021-03-10 22:39:02,644 INFO L226 Difference]: Without dead ends: 2904 [2021-03-10 22:39:02,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1873.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:39:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-03-10 22:39:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2696. [2021-03-10 22:39:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.4909090909090907) internal successors, (6713), 2695 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6713 transitions. [2021-03-10 22:39:02,668 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6713 transitions. Word has length 32 [2021-03-10 22:39:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:02,668 INFO L480 AbstractCegarLoop]: Abstraction has 2696 states and 6713 transitions. [2021-03-10 22:39:02,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6713 transitions. [2021-03-10 22:39:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:02,670 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:02,670 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:02,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3948,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:02,870 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:02,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -331438346, now seen corresponding path program 250 times [2021-03-10 22:39:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:02,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332912533] [2021-03-10 22:39:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332912533] [2021-03-10 22:39:03,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907688624] [2021-03-10 22:39:03,243 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:03,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:39:03,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:03,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:03,790 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:39:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:03,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:03,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:03,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65262183] [2021-03-10 22:39:03,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:03,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:03,956 INFO L87 Difference]: Start difference. First operand 2696 states and 6713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:04,174 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:39:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:05,185 INFO L93 Difference]: Finished difference Result 2902 states and 7212 transitions. [2021-03-10 22:39:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:39:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:05,189 INFO L225 Difference]: With dead ends: 2902 [2021-03-10 22:39:05,189 INFO L226 Difference]: Without dead ends: 2880 [2021-03-10 22:39:05,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1802.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:39:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-03-10 22:39:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2688. [2021-03-10 22:39:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.4908820245627092) internal successors, (6693), 2687 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 6693 transitions. [2021-03-10 22:39:05,218 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 6693 transitions. Word has length 32 [2021-03-10 22:39:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:05,218 INFO L480 AbstractCegarLoop]: Abstraction has 2688 states and 6693 transitions. [2021-03-10 22:39:05,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 6693 transitions. [2021-03-10 22:39:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:05,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:05,220 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:05,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-03-10 22:39:05,423 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash -537376778, now seen corresponding path program 251 times [2021-03-10 22:39:05,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:05,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491950886] [2021-03-10 22:39:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:05,689 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-03-10 22:39:06,011 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-03-10 22:39:06,622 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 18 [2021-03-10 22:39:06,766 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 11 [2021-03-10 22:39:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:06,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491950886] [2021-03-10 22:39:06,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994971924] [2021-03-10 22:39:06,800 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:06,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 22:39:06,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:07,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:07,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:07,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996971839] [2021-03-10 22:39:07,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:07,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:07,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:07,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:07,450 INFO L87 Difference]: Start difference. First operand 2688 states and 6693 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:08,035 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-03-10 22:39:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:08,769 INFO L93 Difference]: Finished difference Result 2982 states and 7404 transitions. [2021-03-10 22:39:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:39:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:08,772 INFO L225 Difference]: With dead ends: 2982 [2021-03-10 22:39:08,772 INFO L226 Difference]: Without dead ends: 2944 [2021-03-10 22:39:08,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1837.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:39:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-03-10 22:39:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2712. [2021-03-10 22:39:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.4909627443747695) internal successors, (6753), 2711 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6753 transitions. [2021-03-10 22:39:08,793 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6753 transitions. Word has length 32 [2021-03-10 22:39:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:08,793 INFO L480 AbstractCegarLoop]: Abstraction has 2712 states and 6753 transitions. [2021-03-10 22:39:08,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6753 transitions. [2021-03-10 22:39:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:08,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:08,795 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:08,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:08,995 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -349686478, now seen corresponding path program 252 times [2021-03-10 22:39:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:08,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444347536] [2021-03-10 22:39:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:09,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444347536] [2021-03-10 22:39:09,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965491237] [2021-03-10 22:39:09,560 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:09,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 22:39:09,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:09,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:10,098 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-10 22:39:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:10,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:10,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833070772] [2021-03-10 22:39:10,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:10,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:10,257 INFO L87 Difference]: Start difference. First operand 2712 states and 6753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:11,438 INFO L93 Difference]: Finished difference Result 2990 states and 7428 transitions. [2021-03-10 22:39:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:39:11,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:11,442 INFO L225 Difference]: With dead ends: 2990 [2021-03-10 22:39:11,442 INFO L226 Difference]: Without dead ends: 2960 [2021-03-10 22:39:11,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1843.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:39:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-03-10 22:39:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2696. [2021-03-10 22:39:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.4909090909090907) internal successors, (6713), 2695 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6713 transitions. [2021-03-10 22:39:11,467 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6713 transitions. Word has length 32 [2021-03-10 22:39:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:11,467 INFO L480 AbstractCegarLoop]: Abstraction has 2696 states and 6713 transitions. [2021-03-10 22:39:11,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6713 transitions. [2021-03-10 22:39:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:11,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:11,469 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:11,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:11,670 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2141866486, now seen corresponding path program 253 times [2021-03-10 22:39:11,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:11,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082966461] [2021-03-10 22:39:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:11,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082966461] [2021-03-10 22:39:11,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498222693] [2021-03-10 22:39:11,957 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:11,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:11,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:12,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:12,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:12,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802524311] [2021-03-10 22:39:12,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:12,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:12,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:12,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:12,562 INFO L87 Difference]: Start difference. First operand 2696 states and 6713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:13,494 INFO L93 Difference]: Finished difference Result 2894 states and 7188 transitions. [2021-03-10 22:39:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:39:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:13,497 INFO L225 Difference]: With dead ends: 2894 [2021-03-10 22:39:13,497 INFO L226 Difference]: Without dead ends: 2864 [2021-03-10 22:39:13,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1391.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:39:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-03-10 22:39:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2712. [2021-03-10 22:39:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.4909627443747695) internal successors, (6753), 2711 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6753 transitions. [2021-03-10 22:39:13,519 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6753 transitions. Word has length 32 [2021-03-10 22:39:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:13,519 INFO L480 AbstractCegarLoop]: Abstraction has 2712 states and 6753 transitions. [2021-03-10 22:39:13,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6753 transitions. [2021-03-10 22:39:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:13,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:13,521 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:13,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:13,723 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:13,723 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 254 times [2021-03-10 22:39:13,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:13,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059454429] [2021-03-10 22:39:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:13,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059454429] [2021-03-10 22:39:13,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916761581] [2021-03-10 22:39:13,995 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:14,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:39:14,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:14,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:14,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:14,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309475615] [2021-03-10 22:39:14,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:14,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:14,753 INFO L87 Difference]: Start difference. First operand 2712 states and 6753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:15,135 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 22:39:15,313 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-03-10 22:39:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:16,332 INFO L93 Difference]: Finished difference Result 2854 states and 7092 transitions. [2021-03-10 22:39:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:39:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:16,335 INFO L225 Difference]: With dead ends: 2854 [2021-03-10 22:39:16,336 INFO L226 Difference]: Without dead ends: 2824 [2021-03-10 22:39:16,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2057.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:39:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-03-10 22:39:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2704. [2021-03-10 22:39:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2703 states have (on average 2.4909359970403258) internal successors, (6733), 2703 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 6733 transitions. [2021-03-10 22:39:16,359 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 6733 transitions. Word has length 32 [2021-03-10 22:39:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:16,359 INFO L480 AbstractCegarLoop]: Abstraction has 2704 states and 6733 transitions. [2021-03-10 22:39:16,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 6733 transitions. [2021-03-10 22:39:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:16,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:16,361 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:16,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:16,561 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:16,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 255 times [2021-03-10 22:39:16,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:16,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888239067] [2021-03-10 22:39:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:16,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888239067] [2021-03-10 22:39:16,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528197514] [2021-03-10 22:39:16,933 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:16,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 22:39:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:17,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062435879] [2021-03-10 22:39:17,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:17,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:17,717 INFO L87 Difference]: Start difference. First operand 2704 states and 6733 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:18,952 INFO L93 Difference]: Finished difference Result 2986 states and 7359 transitions. [2021-03-10 22:39:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:39:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:18,956 INFO L225 Difference]: With dead ends: 2986 [2021-03-10 22:39:18,956 INFO L226 Difference]: Without dead ends: 2956 [2021-03-10 22:39:18,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1762.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:39:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-03-10 22:39:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2752. [2021-03-10 22:39:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.4925481643038894) internal successors, (6857), 2751 states have internal predecessors, (6857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 6857 transitions. [2021-03-10 22:39:18,981 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 6857 transitions. Word has length 32 [2021-03-10 22:39:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:18,981 INFO L480 AbstractCegarLoop]: Abstraction has 2752 states and 6857 transitions. [2021-03-10 22:39:18,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 6857 transitions. [2021-03-10 22:39:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:18,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:18,983 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:19,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4053,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:19,184 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 256 times [2021-03-10 22:39:19,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:19,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044859195] [2021-03-10 22:39:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:19,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044859195] [2021-03-10 22:39:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670635855] [2021-03-10 22:39:19,573 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:19,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:39:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:20,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:20,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:20,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810293640] [2021-03-10 22:39:20,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:20,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:20,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:20,247 INFO L87 Difference]: Start difference. First operand 2752 states and 6857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:21,172 INFO L93 Difference]: Finished difference Result 2838 states and 7048 transitions. [2021-03-10 22:39:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:39:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:21,175 INFO L225 Difference]: With dead ends: 2838 [2021-03-10 22:39:21,176 INFO L226 Difference]: Without dead ends: 2808 [2021-03-10 22:39:21,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1537.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:39:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-03-10 22:39:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2744. [2021-03-10 22:39:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.4910681735326285) internal successors, (6833), 2743 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 6833 transitions. [2021-03-10 22:39:21,197 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 6833 transitions. Word has length 32 [2021-03-10 22:39:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:21,197 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 6833 transitions. [2021-03-10 22:39:21,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 6833 transitions. [2021-03-10 22:39:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:21,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:21,199 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:21,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-03-10 22:39:21,399 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 257 times [2021-03-10 22:39:21,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:21,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746558777] [2021-03-10 22:39:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746558777] [2021-03-10 22:39:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279357495] [2021-03-10 22:39:22,015 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:22,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:39:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:22,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:22,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:22,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:22,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552630651] [2021-03-10 22:39:22,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:22,757 INFO L87 Difference]: Start difference. First operand 2744 states and 6833 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:23,167 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-10 22:39:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:24,327 INFO L93 Difference]: Finished difference Result 2950 states and 7324 transitions. [2021-03-10 22:39:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:39:24,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:24,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:24,331 INFO L225 Difference]: With dead ends: 2950 [2021-03-10 22:39:24,331 INFO L226 Difference]: Without dead ends: 2912 [2021-03-10 22:39:24,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2095.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:39:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-03-10 22:39:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2776. [2021-03-10 22:39:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.491171171171171) internal successors, (6913), 2775 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6913 transitions. [2021-03-10 22:39:24,356 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6913 transitions. Word has length 32 [2021-03-10 22:39:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:24,356 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 6913 transitions. [2021-03-10 22:39:24,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6913 transitions. [2021-03-10 22:39:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 22:39:24,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:24,358 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:24,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-03-10 22:39:24,559 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 258 times [2021-03-10 22:39:24,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:24,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280142504] [2021-03-10 22:39:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:24,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280142504] [2021-03-10 22:39:24,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525871468] [2021-03-10 22:39:24,891 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:24,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:39:24,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:39:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:39:24,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:25,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:25,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:39:25,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427602005] [2021-03-10 22:39:25,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 22:39:25,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:25,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 22:39:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:39:25,602 INFO L87 Difference]: Start difference. First operand 2776 states and 6913 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:26,587 INFO L93 Difference]: Finished difference Result 2910 states and 7228 transitions. [2021-03-10 22:39:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:39:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 22:39:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:26,591 INFO L225 Difference]: With dead ends: 2910 [2021-03-10 22:39:26,591 INFO L226 Difference]: Without dead ends: 2880 [2021-03-10 22:39:26,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1508.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 22:39:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-03-10 22:39:26,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2776. [2021-03-10 22:39:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.491171171171171) internal successors, (6913), 2775 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6913 transitions. [2021-03-10 22:39:26,616 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6913 transitions. Word has length 32 [2021-03-10 22:39:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:26,616 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 6913 transitions. [2021-03-10 22:39:26,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6913 transitions. [2021-03-10 22:39:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:39:26,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:26,618 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:26,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:26,818 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:26,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1175635588, now seen corresponding path program 259 times [2021-03-10 22:39:26,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:26,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023997347] [2021-03-10 22:39:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:27,019 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 16 [2021-03-10 22:39:28,055 WARN L205 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 15 [2021-03-10 22:39:29,401 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 112 DAG size of output: 14 [2021-03-10 22:39:30,730 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 110 DAG size of output: 12 [2021-03-10 22:39:33,335 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 116 DAG size of output: 16 [2021-03-10 22:39:34,373 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 13 [2021-03-10 22:39:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:34,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023997347] [2021-03-10 22:39:34,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952003059] [2021-03-10 22:39:34,423 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:39:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:39:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:39:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:39:35,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:39:35,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:39:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158807912] [2021-03-10 22:39:35,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:39:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:39:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:39:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:39:35,056 INFO L87 Difference]: Start difference. First operand 2776 states and 6913 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:39:36,169 INFO L93 Difference]: Finished difference Result 3212 states and 7928 transitions. [2021-03-10 22:39:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:39:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:39:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:39:36,172 INFO L225 Difference]: With dead ends: 3212 [2021-03-10 22:39:36,172 INFO L226 Difference]: Without dead ends: 3162 [2021-03-10 22:39:36,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1751.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:39:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-03-10 22:39:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2834. [2021-03-10 22:39:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 2.4909989410518882) internal successors, (7057), 2833 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 7057 transitions. [2021-03-10 22:39:36,194 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 7057 transitions. Word has length 34 [2021-03-10 22:39:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:39:36,194 INFO L480 AbstractCegarLoop]: Abstraction has 2834 states and 7057 transitions. [2021-03-10 22:39:36,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:39:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 7057 transitions. [2021-03-10 22:39:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:39:36,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:39:36,196 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:39:36,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-03-10 22:39:36,396 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:39:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:39:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash 985701192, now seen corresponding path program 260 times [2021-03-10 22:39:36,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:39:36,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467945758] [2021-03-10 22:39:36,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:39:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:39:36,572 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 15 [2021-03-10 22:39:37,003 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 13 [2021-03-10 22:39:37,425 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 12 [2021-03-10 22:39:42,375 WARN L205 SmtUtils]: Spent 4.94 s on a formula simplification. DAG size of input: 76 DAG size of output: 7 [2021-03-10 22:39:47,470 WARN L205 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 75 DAG size of output: 11 [2021-03-10 22:39:58,382 WARN L205 SmtUtils]: Spent 10.89 s on a formula simplification. DAG size of input: 79 DAG size of output: 10 [2021-03-10 22:40:05,868 WARN L205 SmtUtils]: Spent 7.46 s on a formula simplification. DAG size of input: 89 DAG size of output: 14 [2021-03-10 22:40:09,443 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 88 DAG size of output: 14 [2021-03-10 22:40:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:40:09,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467945758] [2021-03-10 22:40:09,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10409446] [2021-03-10 22:40:09,505 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:40:09,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:40:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:40:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:40:09,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:40:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:40:10,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:40:10,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:40:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328509686] [2021-03-10 22:40:10,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:40:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:40:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:40:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:40:10,110 INFO L87 Difference]: Start difference. First operand 2834 states and 7057 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:40:11,026 INFO L93 Difference]: Finished difference Result 3254 states and 8047 transitions. [2021-03-10 22:40:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:40:11,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:40:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:40:11,030 INFO L225 Difference]: With dead ends: 3254 [2021-03-10 22:40:11,030 INFO L226 Difference]: Without dead ends: 3224 [2021-03-10 22:40:11,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1265.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 22:40:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-03-10 22:40:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2866. [2021-03-10 22:40:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 2.4910994764397905) internal successors, (7137), 2865 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 7137 transitions. [2021-03-10 22:40:11,058 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 7137 transitions. Word has length 34 [2021-03-10 22:40:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:40:11,058 INFO L480 AbstractCegarLoop]: Abstraction has 2866 states and 7137 transitions. [2021-03-10 22:40:11,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 7137 transitions. [2021-03-10 22:40:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:40:11,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:40:11,060 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:40:11,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4140,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:40:11,260 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:40:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:40:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2050127740, now seen corresponding path program 261 times [2021-03-10 22:40:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:40:11,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399888395] [2021-03-10 22:40:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:40:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:40:11,445 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 16 [2021-03-10 22:40:11,646 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2021-03-10 22:40:12,016 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 20 [2021-03-10 22:40:12,203 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 15 [2021-03-10 22:40:12,375 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 14 [2021-03-10 22:40:12,540 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 10 [2021-03-10 22:40:13,235 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 10 [2021-03-10 22:40:13,509 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 3 [2021-03-10 22:40:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:40:13,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399888395] [2021-03-10 22:40:13,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968596692] [2021-03-10 22:40:13,563 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:40:13,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 22:40:13,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:40:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:40:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:40:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:40:14,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:40:14,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:40:14,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752746675] [2021-03-10 22:40:14,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:40:14,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:40:14,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:40:14,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:40:14,219 INFO L87 Difference]: Start difference. First operand 2866 states and 7137 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:15,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:40:15,637 INFO L93 Difference]: Finished difference Result 3304 states and 8212 transitions. [2021-03-10 22:40:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:40:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:40:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:40:15,640 INFO L225 Difference]: With dead ends: 3304 [2021-03-10 22:40:15,641 INFO L226 Difference]: Without dead ends: 3258 [2021-03-10 22:40:15,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1868.4ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 22:40:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-03-10 22:40:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2882. [2021-03-10 22:40:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.4911489066296424) internal successors, (7177), 2881 states have internal predecessors, (7177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 7177 transitions. [2021-03-10 22:40:15,664 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 7177 transitions. Word has length 34 [2021-03-10 22:40:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:40:15,664 INFO L480 AbstractCegarLoop]: Abstraction has 2882 states and 7177 transitions. [2021-03-10 22:40:15,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:40:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 7177 transitions. [2021-03-10 22:40:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:40:15,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:40:15,666 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:40:15,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4159,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:40:15,866 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:40:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:40:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1862437440, now seen corresponding path program 262 times [2021-03-10 22:40:15,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:40:15,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206375850] [2021-03-10 22:40:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:40:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:40:16,054 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 15 [2021-03-10 22:40:27,717 WARN L205 SmtUtils]: Spent 11.50 s on a formula simplification. DAG size of input: 101 DAG size of output: 24 [2021-03-10 22:40:39,238 WARN L205 SmtUtils]: Spent 11.48 s on a formula simplification. DAG size of input: 101 DAG size of output: 17 [2021-03-10 22:40:50,366 WARN L205 SmtUtils]: Spent 11.08 s on a formula simplification. DAG size of input: 104 DAG size of output: 25 [2021-03-10 22:40:57,826 WARN L205 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 107 DAG size of output: 21 [2021-03-10 22:40:59,756 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 81 DAG size of output: 10 [2021-03-10 22:40:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:40:59,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206375850] [2021-03-10 22:40:59,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197770090] [2021-03-10 22:40:59,796 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:40:59,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:40:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:40:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:40:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:41:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:00,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:41:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:41:00,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49190238] [2021-03-10 22:41:00,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:41:00,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:41:00,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:41:00,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:41:00,441 INFO L87 Difference]: Start difference. First operand 2882 states and 7177 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:41:01,837 INFO L93 Difference]: Finished difference Result 3376 states and 8352 transitions. [2021-03-10 22:41:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:41:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:41:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:41:01,841 INFO L225 Difference]: With dead ends: 3376 [2021-03-10 22:41:01,841 INFO L226 Difference]: Without dead ends: 3346 [2021-03-10 22:41:01,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2005.3ms TimeCoverageRelationStatistics Valid=529, Invalid=1823, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:41:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-03-10 22:41:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2914. [2021-03-10 22:41:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2913 states have (on average 2.49124613800206) internal successors, (7257), 2913 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 7257 transitions. [2021-03-10 22:41:01,867 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 7257 transitions. Word has length 34 [2021-03-10 22:41:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:41:01,868 INFO L480 AbstractCegarLoop]: Abstraction has 2914 states and 7257 transitions. [2021-03-10 22:41:01,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 7257 transitions. [2021-03-10 22:41:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:41:01,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:41:01,870 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:41:02,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4181 [2021-03-10 22:41:02,070 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:41:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:41:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash -470005244, now seen corresponding path program 263 times [2021-03-10 22:41:02,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:41:02,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456830149] [2021-03-10 22:41:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:41:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:41:14,900 WARN L205 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 89 DAG size of output: 7 [2021-03-10 22:41:27,503 WARN L205 SmtUtils]: Spent 12.59 s on a formula simplification. DAG size of input: 88 DAG size of output: 17 [2021-03-10 22:41:33,153 WARN L205 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 103 DAG size of output: 10 [2021-03-10 22:41:43,579 WARN L205 SmtUtils]: Spent 10.41 s on a formula simplification. DAG size of input: 110 DAG size of output: 9 [2021-03-10 22:41:45,773 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 78 DAG size of output: 10 [2021-03-10 22:41:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:45,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456830149] [2021-03-10 22:41:45,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108647475] [2021-03-10 22:41:45,815 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:45,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 22:41:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:41:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:41:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:41:46,378 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:41:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:46,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:41:46,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:41:46,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94429990] [2021-03-10 22:41:46,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:41:46,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:41:46,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:41:46,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:41:46,539 INFO L87 Difference]: Start difference. First operand 2914 states and 7257 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:47,218 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-03-10 22:41:47,479 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 22:41:47,682 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:41:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:41:47,990 INFO L93 Difference]: Finished difference Result 3278 states and 8107 transitions. [2021-03-10 22:41:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:41:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:41:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:41:47,994 INFO L225 Difference]: With dead ends: 3278 [2021-03-10 22:41:47,994 INFO L226 Difference]: Without dead ends: 3248 [2021-03-10 22:41:47,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1942.6ms TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 22:41:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-03-10 22:41:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2938. [2021-03-10 22:41:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.491317671092952) internal successors, (7317), 2937 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 7317 transitions. [2021-03-10 22:41:48,019 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 7317 transitions. Word has length 34 [2021-03-10 22:41:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:41:48,019 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 7317 transitions. [2021-03-10 22:41:48,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 7317 transitions. [2021-03-10 22:41:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:41:48,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:41:48,021 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:41:48,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4203,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:48,221 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:41:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:41:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2094192320, now seen corresponding path program 264 times [2021-03-10 22:41:48,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:41:48,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365340607] [2021-03-10 22:41:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:41:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:41:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365340607] [2021-03-10 22:41:48,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284545104] [2021-03-10 22:41:48,495 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:48,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 22:41:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:41:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:41:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:41:49,054 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:41:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:49,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:41:49,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:41:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483045999] [2021-03-10 22:41:49,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:41:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:41:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:41:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:41:49,246 INFO L87 Difference]: Start difference. First operand 2938 states and 7317 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:49,577 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-10 22:41:49,859 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-10 22:41:50,143 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 22:41:50,554 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:41:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:41:50,757 INFO L93 Difference]: Finished difference Result 3256 states and 8096 transitions. [2021-03-10 22:41:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:41:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:41:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:41:50,761 INFO L225 Difference]: With dead ends: 3256 [2021-03-10 22:41:50,761 INFO L226 Difference]: Without dead ends: 3226 [2021-03-10 22:41:50,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1967.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:41:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-03-10 22:41:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2954. [2021-03-10 22:41:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 2.491364713850322) internal successors, (7357), 2953 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 7357 transitions. [2021-03-10 22:41:50,787 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 7357 transitions. Word has length 34 [2021-03-10 22:41:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:41:50,787 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 7357 transitions. [2021-03-10 22:41:50,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 7357 transitions. [2021-03-10 22:41:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:41:50,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:41:50,789 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:41:50,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4229,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:50,989 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:41:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:41:50,990 INFO L82 PathProgramCache]: Analyzing trace with hash -516270400, now seen corresponding path program 265 times [2021-03-10 22:41:50,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:41:50,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416936041] [2021-03-10 22:41:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:41:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:41:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416936041] [2021-03-10 22:41:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280119514] [2021-03-10 22:41:51,606 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:41:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 22:41:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:41:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:41:52,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:41:52,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 22:41:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064482955] [2021-03-10 22:41:52,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 22:41:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:41:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 22:41:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:41:52,262 INFO L87 Difference]: Start difference. First operand 2954 states and 7357 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:41:53,459 INFO L93 Difference]: Finished difference Result 3388 states and 8372 transitions. [2021-03-10 22:41:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:41:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 22:41:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:41:53,463 INFO L225 Difference]: With dead ends: 3388 [2021-03-10 22:41:53,463 INFO L226 Difference]: Without dead ends: 3346 [2021-03-10 22:41:53,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1902.0ms TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 22:41:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-03-10 22:41:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2986. [2021-03-10 22:41:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.4914572864321607) internal successors, (7437), 2985 states have internal predecessors, (7437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 7437 transitions. [2021-03-10 22:41:53,491 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 7437 transitions. Word has length 34 [2021-03-10 22:41:53,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:41:53,491 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 7437 transitions. [2021-03-10 22:41:53,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:41:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 7437 transitions. [2021-03-10 22:41:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 22:41:53,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:41:53,493 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:41:53,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4250,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:41:53,694 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:41:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:41:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash 876161796, now seen corresponding path program 266 times [2021-03-10 22:41:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:41:53,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717085854] [2021-03-10 22:41:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:41:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:42:05,343 WARN L205 SmtUtils]: Spent 11.51 s on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-03-10 22:42:29,916 WARN L205 SmtUtils]: Spent 24.49 s on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-03-10 22:42:54,433 WARN L205 SmtUtils]: Spent 24.43 s on a formula simplification. DAG size of input: 80 DAG size of output: 25 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown