/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-3-extended.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:26:40,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:26:40,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:26:40,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:26:40,112 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 [2021-06-05 22:26:40,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:26:40,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:26:40,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:26:40,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:26:40,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:26:40,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:26:40,149 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:26:40,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:26:40,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:26:40,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:26:40,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:26:40,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:26:40,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:26:40,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:26:40,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:26:40,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:26:40,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:26:40,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:26:40,153 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:26:40,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:26:40,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:26:40,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:26:40,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:26:40,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:26:40,442 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:26:40,443 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:26:40,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl [2021-06-05 22:26:40,445 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-3-extended.wvr.bpl' [2021-06-05 22:26:40,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:26:40,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:26:40,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:26:40,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:26:40,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:26:40,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:26:40,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:26:40,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:26:40,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:26:40,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... [2021-06-05 22:26:40,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:26:40,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:26:40,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:26:40,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:26:40,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:26:40,616 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:26:40,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:26:40,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:26:40,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:26:40,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:26:40,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:26:40,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:26:40,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:26:40,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:26:40,618 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:26:40,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:26:40,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:26:40,619 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:26:40,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:26:40,862 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:26:40,863 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:26:40 BoogieIcfgContainer [2021-06-05 22:26:40,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:26:40,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:26:40,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:26:40,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:26:40,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:26:40" (1/2) ... [2021-06-05 22:26:40,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db66963 and model type misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:26:40, skipping insertion in model container [2021-06-05 22:26:40,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:26:40" (2/2) ... [2021-06-05 22:26:40,885 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-3-extended.wvr.bpl [2021-06-05 22:26:40,890 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:26:40,890 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:26:40,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:26:40,891 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:26:40,960 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:26:40,990 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:26:41,006 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:26:41,006 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:26:41,006 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:26:41,006 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:26:41,006 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:26:41,006 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:26:41,007 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:26:41,007 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:26:41,015 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 50 transitions, 124 flow [2021-06-05 22:26:41,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:26:41,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,123 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:41,124 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -932509886, now seen corresponding path program 1 times [2021-06-05 22:26:41,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70155844] [2021-06-05 22:26:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:41,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70155844] [2021-06-05 22:26:41,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70155844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:41,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:41,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:26:41,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923196785] [2021-06-05 22:26:41,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:26:41,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:26:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,277 INFO L87 Difference]: Start difference. First operand has 916 states, 914 states have (on average 3.8938730853391683) internal successors, (3559), 915 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,336 INFO L93 Difference]: Finished difference Result 1005 states and 3886 transitions. [2021-06-05 22:26:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:26:41,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:26:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,363 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 22:26:41,363 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 22:26:41,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 22:26:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2021-06-05 22:26:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.8705179282868527) internal successors, (3886), 1004 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3886 transitions. [2021-06-05 22:26:41,488 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3886 transitions. Word has length 15 [2021-06-05 22:26:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,488 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3886 transitions. [2021-06-05 22:26:41,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3886 transitions. [2021-06-05 22:26:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:26:41,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,492 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:41,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:26:41,493 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,499 INFO L82 PathProgramCache]: Analyzing trace with hash -406691327, now seen corresponding path program 1 times [2021-06-05 22:26:41,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266911304] [2021-06-05 22:26:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:41,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266911304] [2021-06-05 22:26:41,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266911304] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:41,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:41,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:26:41,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097317971] [2021-06-05 22:26:41,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:26:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:26:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,531 INFO L87 Difference]: Start difference. First operand 1005 states and 3886 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,552 INFO L93 Difference]: Finished difference Result 1114 states and 4276 transitions. [2021-06-05 22:26:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:26:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:26:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,560 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 22:26:41,560 INFO L226 Difference]: Without dead ends: 1114 [2021-06-05 22:26:41,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-05 22:26:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-06-05 22:26:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.8418688230008984) internal successors, (4276), 1113 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 4276 transitions. [2021-06-05 22:26:41,601 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 4276 transitions. Word has length 21 [2021-06-05 22:26:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,602 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 4276 transitions. [2021-06-05 22:26:41,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 4276 transitions. [2021-06-05 22:26:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:26:41,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,607 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:41,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:26:41,607 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1420660192, now seen corresponding path program 1 times [2021-06-05 22:26:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704774407] [2021-06-05 22:26:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:41,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704774407] [2021-06-05 22:26:41,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704774407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:41,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:41,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:26:41,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781657252] [2021-06-05 22:26:41,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:41,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:41,660 INFO L87 Difference]: Start difference. First operand 1114 states and 4276 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,694 INFO L93 Difference]: Finished difference Result 1550 states and 5618 transitions. [2021-06-05 22:26:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:26:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:26:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,705 INFO L225 Difference]: With dead ends: 1550 [2021-06-05 22:26:41,705 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 22:26:41,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 22:26:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1550. [2021-06-05 22:26:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.6268560361523563) internal successors, (5618), 1549 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5618 transitions. [2021-06-05 22:26:41,757 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5618 transitions. Word has length 27 [2021-06-05 22:26:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,758 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5618 transitions. [2021-06-05 22:26:41,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5618 transitions. [2021-06-05 22:26:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:26:41,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,762 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:41,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:26:41,762 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 530548488, now seen corresponding path program 1 times [2021-06-05 22:26:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343037217] [2021-06-05 22:26:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:26:41,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343037217] [2021-06-05 22:26:41,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343037217] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:41,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:41,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:26:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001617498] [2021-06-05 22:26:41,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:26:41,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:26:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,815 INFO L87 Difference]: Start difference. First operand 1550 states and 5618 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:41,842 INFO L93 Difference]: Finished difference Result 1705 states and 6135 transitions. [2021-06-05 22:26:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:26:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 22:26:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:41,853 INFO L225 Difference]: With dead ends: 1705 [2021-06-05 22:26:41,853 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 22:26:41,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 22:26:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2021-06-05 22:26:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.6003521126760565) internal successors, (6135), 1704 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6135 transitions. [2021-06-05 22:26:41,905 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6135 transitions. Word has length 32 [2021-06-05 22:26:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:41,906 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 6135 transitions. [2021-06-05 22:26:41,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:41,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6135 transitions. [2021-06-05 22:26:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:26:41,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:41,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:41,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:26:41,913 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1222758273, now seen corresponding path program 1 times [2021-06-05 22:26:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:41,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572793686] [2021-06-05 22:26:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:26:41,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:41,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572793686] [2021-06-05 22:26:41,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572793686] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:41,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:41,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:26:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565735685] [2021-06-05 22:26:41,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:26:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:26:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:41,966 INFO L87 Difference]: Start difference. First operand 1705 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,002 INFO L93 Difference]: Finished difference Result 2170 states and 7686 transitions. [2021-06-05 22:26:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:26:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 22:26:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,015 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 22:26:42,016 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 22:26:42,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:26:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 22:26:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 2015. [2021-06-05 22:26:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5595829195630584) internal successors, (7169), 2014 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7169 transitions. [2021-06-05 22:26:42,080 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7169 transitions. Word has length 38 [2021-06-05 22:26:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,081 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7169 transitions. [2021-06-05 22:26:42,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7169 transitions. [2021-06-05 22:26:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 22:26:42,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:42,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:26:42,090 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1485994045, now seen corresponding path program 1 times [2021-06-05 22:26:42,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432689198] [2021-06-05 22:26:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:26:42,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:42,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432689198] [2021-06-05 22:26:42,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432689198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082482219] [2021-06-05 22:26:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 22:26:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:26:42,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082482219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:42,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:42,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 22:26:42,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144532000] [2021-06-05 22:26:42,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:42,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:42,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:42,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,323 INFO L87 Difference]: Start difference. First operand 2015 states and 7169 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,404 INFO L93 Difference]: Finished difference Result 2747 states and 9215 transitions. [2021-06-05 22:26:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:26:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 22:26:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,420 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 22:26:42,420 INFO L226 Difference]: Without dead ends: 2747 [2021-06-05 22:26:42,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-06-05 22:26:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-06-05 22:26:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2746 states have (on average 3.3557902403495996) internal successors, (9215), 2746 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 9215 transitions. [2021-06-05 22:26:42,495 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 9215 transitions. Word has length 38 [2021-06-05 22:26:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,495 INFO L482 AbstractCegarLoop]: Abstraction has 2747 states and 9215 transitions. [2021-06-05 22:26:42,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 9215 transitions. [2021-06-05 22:26:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:26:42,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:42,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 22:26:42,717 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1462810483, now seen corresponding path program 1 times [2021-06-05 22:26:42,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393605105] [2021-06-05 22:26:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 22:26:42,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:42,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393605105] [2021-06-05 22:26:42,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393605105] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:26:42,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:26:42,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:26:42,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878369818] [2021-06-05 22:26:42,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:26:42,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:42,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:26:42,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,759 INFO L87 Difference]: Start difference. First operand 2747 states and 9215 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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) [2021-06-05 22:26:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:42,793 INFO L93 Difference]: Finished difference Result 3169 states and 10115 transitions. [2021-06-05 22:26:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:26:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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 43 [2021-06-05 22:26:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:42,809 INFO L225 Difference]: With dead ends: 3169 [2021-06-05 22:26:42,810 INFO L226 Difference]: Without dead ends: 3169 [2021-06-05 22:26:42,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:26:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-05 22:26:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3169. [2021-06-05 22:26:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3168 states have (on average 3.1928661616161618) internal successors, (10115), 3168 states have internal predecessors, (10115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 10115 transitions. [2021-06-05 22:26:42,897 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 10115 transitions. Word has length 43 [2021-06-05 22:26:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 3169 states and 10115 transitions. [2021-06-05 22:26:42,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 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) [2021-06-05 22:26:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 10115 transitions. [2021-06-05 22:26:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:42,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:42,906 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:42,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:26:42,907 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:42,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1025488637, now seen corresponding path program 1 times [2021-06-05 22:26:42,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:42,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318113423] [2021-06-05 22:26:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:43,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:43,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318113423] [2021-06-05 22:26:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318113423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010333914] [2021-06-05 22:26:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:43,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010333914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:43,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 22:26:43,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403324957] [2021-06-05 22:26:43,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:26:43,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:26:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,341 INFO L87 Difference]: Start difference. First operand 3169 states and 10115 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:43,421 INFO L93 Difference]: Finished difference Result 5225 states and 16762 transitions. [2021-06-05 22:26:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:26:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:43,452 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 22:26:43,452 INFO L226 Difference]: Without dead ends: 5074 [2021-06-05 22:26:43,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:26:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-06-05 22:26:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 4826. [2021-06-05 22:26:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 3.2426943005181346) internal successors, (15646), 4825 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 15646 transitions. [2021-06-05 22:26:43,585 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 15646 transitions. Word has length 48 [2021-06-05 22:26:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:43,587 INFO L482 AbstractCegarLoop]: Abstraction has 4826 states and 15646 transitions. [2021-06-05 22:26:43,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 15646 transitions. [2021-06-05 22:26:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:43,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:43,598 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:43,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:43,821 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1806127869, now seen corresponding path program 2 times [2021-06-05 22:26:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:43,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038080256] [2021-06-05 22:26:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:43,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:43,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038080256] [2021-06-05 22:26:43,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038080256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446737097] [2021-06-05 22:26:43,930 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:43,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446737097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:44,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909643323] [2021-06-05 22:26:44,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:44,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,134 INFO L87 Difference]: Start difference. First operand 4826 states and 15646 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:44,221 INFO L93 Difference]: Finished difference Result 6962 states and 22532 transitions. [2021-06-05 22:26:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:44,239 INFO L225 Difference]: With dead ends: 6962 [2021-06-05 22:26:44,240 INFO L226 Difference]: Without dead ends: 6313 [2021-06-05 22:26:44,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2021-06-05 22:26:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 4631. [2021-06-05 22:26:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 3.2323974082073432) internal successors, (14966), 4630 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 14966 transitions. [2021-06-05 22:26:44,405 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 14966 transitions. Word has length 48 [2021-06-05 22:26:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:44,406 INFO L482 AbstractCegarLoop]: Abstraction has 4631 states and 14966 transitions. [2021-06-05 22:26:44,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 14966 transitions. [2021-06-05 22:26:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:44,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:44,417 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:44,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:44,633 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 492650975, now seen corresponding path program 3 times [2021-06-05 22:26:44,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:44,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065541167] [2021-06-05 22:26:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:44,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:44,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065541167] [2021-06-05 22:26:44,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065541167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155009562] [2021-06-05 22:26:44,699 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 [2021-06-05 22:26:44,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:44,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:44,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155009562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:44,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 22:26:44,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593755793] [2021-06-05 22:26:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:26:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:26:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:44,905 INFO L87 Difference]: Start difference. First operand 4631 states and 14966 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:44,996 INFO L93 Difference]: Finished difference Result 8195 states and 26626 transitions. [2021-06-05 22:26:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:26:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:45,019 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 22:26:45,019 INFO L226 Difference]: Without dead ends: 7472 [2021-06-05 22:26:45,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:26:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7472 states. [2021-06-05 22:26:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7472 to 6998. [2021-06-05 22:26:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6997 states have (on average 3.2722595398027727) internal successors, (22896), 6997 states have internal predecessors, (22896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 22896 transitions. [2021-06-05 22:26:45,207 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 22896 transitions. Word has length 48 [2021-06-05 22:26:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:45,207 INFO L482 AbstractCegarLoop]: Abstraction has 6998 states and 22896 transitions. [2021-06-05 22:26:45,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 22896 transitions. [2021-06-05 22:26:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:45,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:45,225 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:45,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:45,441 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -647503601, now seen corresponding path program 4 times [2021-06-05 22:26:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683706545] [2021-06-05 22:26:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:45,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683706545] [2021-06-05 22:26:45,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683706545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787692204] [2021-06-05 22:26:45,531 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:45,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:45,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:26:45,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787692204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:45,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:45,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900408809] [2021-06-05 22:26:45,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:45,693 INFO L87 Difference]: Start difference. First operand 6998 states and 22896 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:45,819 INFO L93 Difference]: Finished difference Result 9603 states and 31287 transitions. [2021-06-05 22:26:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 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 48 [2021-06-05 22:26:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:45,841 INFO L225 Difference]: With dead ends: 9603 [2021-06-05 22:26:45,841 INFO L226 Difference]: Without dead ends: 8352 [2021-06-05 22:26:45,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-06-05 22:26:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6644. [2021-06-05 22:26:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6643 states have (on average 3.2599729038085203) internal successors, (21656), 6643 states have internal predecessors, (21656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 21656 transitions. [2021-06-05 22:26:45,994 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 21656 transitions. Word has length 48 [2021-06-05 22:26:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:45,995 INFO L482 AbstractCegarLoop]: Abstraction has 6644 states and 21656 transitions. [2021-06-05 22:26:45,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 21656 transitions. [2021-06-05 22:26:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:46,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:46,016 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:46,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 22:26:46,229 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1805099289, now seen corresponding path program 5 times [2021-06-05 22:26:46,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:46,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553314009] [2021-06-05 22:26:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:26:46,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:46,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553314009] [2021-06-05 22:26:46,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553314009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863732043] [2021-06-05 22:26:46,293 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:46,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:26:46,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863732043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:46,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:46,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247412847] [2021-06-05 22:26:46,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:46,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:46,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:46,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:46,451 INFO L87 Difference]: Start difference. First operand 6644 states and 21656 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:46,546 INFO L93 Difference]: Finished difference Result 8899 states and 28902 transitions. [2021-06-05 22:26:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:46,566 INFO L225 Difference]: With dead ends: 8899 [2021-06-05 22:26:46,567 INFO L226 Difference]: Without dead ends: 8464 [2021-06-05 22:26:46,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2021-06-05 22:26:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 6769. [2021-06-05 22:26:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 3.255171394799054) internal successors, (22031), 6768 states have internal predecessors, (22031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 22031 transitions. [2021-06-05 22:26:46,712 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 22031 transitions. Word has length 48 [2021-06-05 22:26:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:46,712 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 22031 transitions. [2021-06-05 22:26:46,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 22031 transitions. [2021-06-05 22:26:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:46,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:46,726 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:46,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1316032927, now seen corresponding path program 6 times [2021-06-05 22:26:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:46,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486635279] [2021-06-05 22:26:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:26:47,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:47,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486635279] [2021-06-05 22:26:47,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486635279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886061215] [2021-06-05 22:26:47,017 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:47,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:47,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:47,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:26:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886061215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:47,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 22:26:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513280963] [2021-06-05 22:26:47,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:26:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:26:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:47,157 INFO L87 Difference]: Start difference. First operand 6769 states and 22031 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:47,282 INFO L93 Difference]: Finished difference Result 11547 states and 37607 transitions. [2021-06-05 22:26:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:26:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:47,310 INFO L225 Difference]: With dead ends: 11547 [2021-06-05 22:26:47,310 INFO L226 Difference]: Without dead ends: 11400 [2021-06-05 22:26:47,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:26:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11400 states. [2021-06-05 22:26:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11400 to 10354. [2021-06-05 22:26:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10354 states, 10353 states have (on average 3.3118902733507194) internal successors, (34288), 10353 states have internal predecessors, (34288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10354 states to 10354 states and 34288 transitions. [2021-06-05 22:26:47,525 INFO L78 Accepts]: Start accepts. Automaton has 10354 states and 34288 transitions. Word has length 48 [2021-06-05 22:26:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:47,525 INFO L482 AbstractCegarLoop]: Abstraction has 10354 states and 34288 transitions. [2021-06-05 22:26:47,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 10354 states and 34288 transitions. [2021-06-05 22:26:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:47,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:47,547 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:47,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:47,761 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -45523527, now seen corresponding path program 7 times [2021-06-05 22:26:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:47,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978353132] [2021-06-05 22:26:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978353132] [2021-06-05 22:26:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978353132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905182756] [2021-06-05 22:26:47,833 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905182756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:47,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706050896] [2021-06-05 22:26:47,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:47,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:47,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:47,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:47,972 INFO L87 Difference]: Start difference. First operand 10354 states and 34288 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:48,106 INFO L93 Difference]: Finished difference Result 13296 states and 43632 transitions. [2021-06-05 22:26:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:48,130 INFO L225 Difference]: With dead ends: 13296 [2021-06-05 22:26:48,130 INFO L226 Difference]: Without dead ends: 11854 [2021-06-05 22:26:48,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11854 states. [2021-06-05 22:26:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11854 to 7019. [2021-06-05 22:26:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7019 states, 7018 states have (on average 3.2460815047021945) internal successors, (22781), 7018 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7019 states to 7019 states and 22781 transitions. [2021-06-05 22:26:48,375 INFO L78 Accepts]: Start accepts. Automaton has 7019 states and 22781 transitions. Word has length 48 [2021-06-05 22:26:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:48,375 INFO L482 AbstractCegarLoop]: Abstraction has 7019 states and 22781 transitions. [2021-06-05 22:26:48,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7019 states and 22781 transitions. [2021-06-05 22:26:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:48,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:48,393 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:26:48,625 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2094008463, now seen corresponding path program 8 times [2021-06-05 22:26:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:48,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515260444] [2021-06-05 22:26:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:48,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515260444] [2021-06-05 22:26:48,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515260444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720760720] [2021-06-05 22:26:48,760 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:48,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:48,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:48,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:48,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720760720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:48,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:48,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37434837] [2021-06-05 22:26:48,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:48,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:48,937 INFO L87 Difference]: Start difference. First operand 7019 states and 22781 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:49,063 INFO L93 Difference]: Finished difference Result 10813 states and 35013 transitions. [2021-06-05 22:26:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:49,084 INFO L225 Difference]: With dead ends: 10813 [2021-06-05 22:26:49,084 INFO L226 Difference]: Without dead ends: 10186 [2021-06-05 22:26:49,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-06-05 22:26:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 7527. [2021-06-05 22:26:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 7526 states have (on average 3.233723093276641) internal successors, (24337), 7526 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 24337 transitions. [2021-06-05 22:26:49,278 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 24337 transitions. Word has length 48 [2021-06-05 22:26:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:49,279 INFO L482 AbstractCegarLoop]: Abstraction has 7527 states and 24337 transitions. [2021-06-05 22:26:49,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 24337 transitions. [2021-06-05 22:26:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:49,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:49,291 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:49,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:26:49,505 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 839402379, now seen corresponding path program 9 times [2021-06-05 22:26:49,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:49,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321963945] [2021-06-05 22:26:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:49,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:49,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321963945] [2021-06-05 22:26:49,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321963945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229833581] [2021-06-05 22:26:49,636 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:49,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:26:49,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:49,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229833581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:49,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:49,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192944361] [2021-06-05 22:26:49,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:49,768 INFO L87 Difference]: Start difference. First operand 7527 states and 24337 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:49,908 INFO L93 Difference]: Finished difference Result 12429 states and 40214 transitions. [2021-06-05 22:26:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:49,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:49,933 INFO L225 Difference]: With dead ends: 12429 [2021-06-05 22:26:49,933 INFO L226 Difference]: Without dead ends: 12276 [2021-06-05 22:26:49,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2021-06-05 22:26:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 12112. [2021-06-05 22:26:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12112 states, 12111 states have (on average 3.2449838989348527) internal successors, (39300), 12111 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12112 states to 12112 states and 39300 transitions. [2021-06-05 22:26:50,246 INFO L78 Accepts]: Start accepts. Automaton has 12112 states and 39300 transitions. Word has length 48 [2021-06-05 22:26:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:50,246 INFO L482 AbstractCegarLoop]: Abstraction has 12112 states and 39300 transitions. [2021-06-05 22:26:50,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 12112 states and 39300 transitions. [2021-06-05 22:26:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:50,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:50,278 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:50,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:26:50,493 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -396921487, now seen corresponding path program 10 times [2021-06-05 22:26:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:50,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561007366] [2021-06-05 22:26:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:50,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:50,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561007366] [2021-06-05 22:26:50,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561007366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340267354] [2021-06-05 22:26:50,570 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:50,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:50,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:50,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340267354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:50,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:50,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062809210] [2021-06-05 22:26:50,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:50,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:50,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:50,757 INFO L87 Difference]: Start difference. First operand 12112 states and 39300 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:50,913 INFO L93 Difference]: Finished difference Result 21741 states and 70711 transitions. [2021-06-05 22:26:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:50,946 INFO L225 Difference]: With dead ends: 21741 [2021-06-05 22:26:50,946 INFO L226 Difference]: Without dead ends: 19893 [2021-06-05 22:26:50,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-06-05 22:26:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 18976. [2021-06-05 22:26:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18976 states, 18975 states have (on average 3.25965744400527) internal successors, (61852), 18975 states have internal predecessors, (61852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18976 states to 18976 states and 61852 transitions. [2021-06-05 22:26:51,414 INFO L78 Accepts]: Start accepts. Automaton has 18976 states and 61852 transitions. Word has length 48 [2021-06-05 22:26:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:51,414 INFO L482 AbstractCegarLoop]: Abstraction has 18976 states and 61852 transitions. [2021-06-05 22:26:51,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 18976 states and 61852 transitions. [2021-06-05 22:26:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:51,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:51,440 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:51,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:26:51,645 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1705288085, now seen corresponding path program 11 times [2021-06-05 22:26:51,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:51,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779810222] [2021-06-05 22:26:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:51,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:51,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779810222] [2021-06-05 22:26:51,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779810222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:51,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951273987] [2021-06-05 22:26:51,723 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:51,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:26:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:51,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:51,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951273987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:51,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:51,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:51,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969653583] [2021-06-05 22:26:51,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:51,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:51,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:51,851 INFO L87 Difference]: Start difference. First operand 18976 states and 61852 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:52,121 INFO L93 Difference]: Finished difference Result 34095 states and 111504 transitions. [2021-06-05 22:26:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:52,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:52,179 INFO L225 Difference]: With dead ends: 34095 [2021-06-05 22:26:52,180 INFO L226 Difference]: Without dead ends: 30605 [2021-06-05 22:26:52,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-06-05 22:26:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 29305. [2021-06-05 22:26:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29305 states, 29304 states have (on average 3.2807125307125307) internal successors, (96138), 29304 states have internal predecessors, (96138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29305 states to 29305 states and 96138 transitions. [2021-06-05 22:26:52,912 INFO L78 Accepts]: Start accepts. Automaton has 29305 states and 96138 transitions. Word has length 48 [2021-06-05 22:26:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:52,912 INFO L482 AbstractCegarLoop]: Abstraction has 29305 states and 96138 transitions. [2021-06-05 22:26:52,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:52,912 INFO L276 IsEmpty]: Start isEmpty. Operand 29305 states and 96138 transitions. [2021-06-05 22:26:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 22:26:52,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:52,994 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:53,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:26:53,196 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash 574504397, now seen corresponding path program 12 times [2021-06-05 22:26:53,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:53,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203554176] [2021-06-05 22:26:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:53,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:53,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203554176] [2021-06-05 22:26:53,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203554176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:53,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031691240] [2021-06-05 22:26:53,254 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:53,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:26:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031691240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:53,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:53,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 22:26:53,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771394916] [2021-06-05 22:26:53,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:26:53,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:26:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:53,372 INFO L87 Difference]: Start difference. First operand 29305 states and 96138 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:53,695 INFO L93 Difference]: Finished difference Result 46568 states and 152448 transitions. [2021-06-05 22:26:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:26:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 22:26:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:53,783 INFO L225 Difference]: With dead ends: 46568 [2021-06-05 22:26:53,783 INFO L226 Difference]: Without dead ends: 44858 [2021-06-05 22:26:53,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:26:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44858 states. [2021-06-05 22:26:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44858 to 44258. [2021-06-05 22:26:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44258 states, 44257 states have (on average 3.277741374245882) internal successors, (145063), 44257 states have internal predecessors, (145063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44258 states to 44258 states and 145063 transitions. [2021-06-05 22:26:54,605 INFO L78 Accepts]: Start accepts. Automaton has 44258 states and 145063 transitions. Word has length 48 [2021-06-05 22:26:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:54,605 INFO L482 AbstractCegarLoop]: Abstraction has 44258 states and 145063 transitions. [2021-06-05 22:26:54,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 44258 states and 145063 transitions. [2021-06-05 22:26:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 22:26:54,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:54,857 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:55,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:55,081 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2122818921, now seen corresponding path program 1 times [2021-06-05 22:26:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:55,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535625434] [2021-06-05 22:26:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:55,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535625434] [2021-06-05 22:26:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535625434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760798435] [2021-06-05 22:26:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:55,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:26:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:26:55,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760798435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:55,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:55,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 22:26:55,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973385535] [2021-06-05 22:26:55,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:26:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:26:55,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:55,296 INFO L87 Difference]: Start difference. First operand 44258 states and 145063 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:55,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:55,539 INFO L93 Difference]: Finished difference Result 44256 states and 145061 transitions. [2021-06-05 22:26:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:26:55,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 22:26:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:55,540 INFO L225 Difference]: With dead ends: 44256 [2021-06-05 22:26:55,540 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 22:26:55,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:26:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 22:26:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 22:26:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 22:26:55,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-06-05 22:26:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:55,540 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 22:26:55,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 22:26:55,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:26:55,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:55,743 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:26:55,745 INFO L202 PluginConnector]: Adding new model misc-3-extended.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:26:55 BasicIcfg [2021-06-05 22:26:55,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:26:55,745 INFO L168 Benchmark]: Toolchain (without parser) took 15230.31 ms. Allocated memory was 364.9 MB in the beginning and 6.5 GB in the end (delta: 6.1 GB). Free memory was 343.8 MB in the beginning and 5.7 GB in the end (delta: -5.3 GB). Peak memory consumption was 759.2 MB. Max. memory is 16.0 GB. [2021-06-05 22:26:55,745 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory is still 344.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:26:55,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.08 ms. Allocated memory is still 364.9 MB. Free memory was 343.8 MB in the beginning and 342.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:26:55,745 INFO L168 Benchmark]: Boogie Preprocessor took 12.25 ms. Allocated memory is still 364.9 MB. Free memory was 342.3 MB in the beginning and 341.3 MB in the end (delta: 948.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:26:55,745 INFO L168 Benchmark]: RCFGBuilder took 313.73 ms. Allocated memory is still 364.9 MB. Free memory was 341.2 MB in the beginning and 328.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:26:55,746 INFO L168 Benchmark]: TraceAbstraction took 14880.04 ms. Allocated memory was 364.9 MB in the beginning and 6.5 GB in the end (delta: 6.1 GB). Free memory was 327.9 MB in the beginning and 5.7 GB in the end (delta: -5.4 GB). Peak memory consumption was 744.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:26:55,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory is still 344.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.08 ms. Allocated memory is still 364.9 MB. Free memory was 343.8 MB in the beginning and 342.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.25 ms. Allocated memory is still 364.9 MB. Free memory was 342.3 MB in the beginning and 341.3 MB in the end (delta: 948.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 313.73 ms. Allocated memory is still 364.9 MB. Free memory was 341.2 MB in the beginning and 328.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 14880.04 ms. Allocated memory was 364.9 MB in the beginning and 6.5 GB in the end (delta: 6.1 GB). Free memory was 327.9 MB in the beginning and 5.7 GB in the end (delta: -5.4 GB). Peak memory consumption was 744.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 100]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 69 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14737.4ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 580.4ms, AutomataDifference: 2822.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2083 SDtfs, 1333 SDslu, 7964 SDs, 0 SdLazy, 1605 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 779.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 782 GetRequests, 677 SyntacticMatches, 26 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 553.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44258occurred in iteration=19, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4246.1ms AutomataMinimizationTime, 20 MinimizatonAttempts, 17483 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 172.1ms SsaConstructionTime, 339.6ms SatisfiabilityAnalysisTime, 2892.9ms InterpolantComputationTime, 1522 NumberOfCodeBlocks, 1514 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1488 ConstructedInterpolants, 0 QuantifiedInterpolants, 8806 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1124 ConjunctsInSsa, 202 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 97/565 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...