/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 12:57:43,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 12:57:43,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 12:57:43,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 12:57:43,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 12:57:43,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 12:57:43,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 12:57:43,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 12:57:43,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 12:57:43,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 12:57:43,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 12:57:43,169 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 12:57:43,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 12:57:43,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 12:57:43,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 12:57:43,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 12:57:43,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 12:57:43,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 12:57:43,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 12:57:43,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 12:57:43,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 12:57:43,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 12:57:43,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 12:57:43,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 12:57:43,173 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 12:57:43,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 12:57:43,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 12:57:43,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 12:57:43,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 12:57:43,513 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 12:57:43,515 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 12:57:43,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl [2021-06-05 12:57:43,516 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/bigNumberOfThreads.bpl' [2021-06-05 12:57:43,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 12:57:43,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 12:57:43,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 12:57:43,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 12:57:43,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 12:57:43,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 12:57:43,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 12:57:43,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 12:57:43,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 12:57:43,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/1) ... [2021-06-05 12:57:43,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 12:57:43,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 12:57:43,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 12:57:43,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 12:57:43,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (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 12:57:43,657 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 12:57:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 12:57:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 12:57:43,658 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 12:57:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 12:57:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 12:57:43,659 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 12:57:43,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 12:57:43,792 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 12:57:43,794 INFO L202 PluginConnector]: Adding new model bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:57:43 BoogieIcfgContainer [2021-06-05 12:57:43,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 12:57:43,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 12:57:43,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 12:57:43,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 12:57:43,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 12:57:43" (1/2) ... [2021-06-05 12:57:43,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3727468 and model type bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 12:57:43, skipping insertion in model container [2021-06-05 12:57:43,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 12:57:43" (2/2) ... [2021-06-05 12:57:43,802 INFO L111 eAbstractionObserver]: Analyzing ICFG bigNumberOfThreads.bpl [2021-06-05 12:57:43,809 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 12:57:43,810 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 12:57:43,810 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 12:57:43,811 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 12:57:43,842 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 12:57:43,870 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:43,896 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:43,897 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:43,897 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:43,897 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:43,897 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:43,897 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:43,898 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:43,899 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:43,909 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 12 transitions, 29 flow [2021-06-05 12:57:43,921 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 31 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 12:57:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 31 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 12:57:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:57:43,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:43,928 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:57:43,929 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1386462, now seen corresponding path program 1 times [2021-06-05 12:57:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:43,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860460485] [2021-06-05 12:57:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,073 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 12:57:44,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860460485] [2021-06-05 12:57:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860460485] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:44,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:44,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:44,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049572171] [2021-06-05 12:57:44,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:44,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:44,095 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 31 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:44,137 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2021-06-05 12:57:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:57:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:44,146 INFO L225 Difference]: With dead ends: 28 [2021-06-05 12:57:44,146 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 12:57:44,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 12:57:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 12:57:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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 12:57:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-06-05 12:57:44,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 4 [2021-06-05 12:57:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:44,180 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-06-05 12:57:44,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-06-05 12:57:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:44,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:44,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:44,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 12:57:44,181 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:44,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1646156535, now seen corresponding path program 1 times [2021-06-05 12:57:44,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660330409] [2021-06-05 12:57:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:44,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660330409] [2021-06-05 12:57:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660330409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569407669] [2021-06-05 12:57:44,252 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 12:57:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569407669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129856035] [2021-06-05 12:57:44,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:44,393 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:44,402 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2021-06-05 12:57:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 12:57:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:44,403 INFO L225 Difference]: With dead ends: 10 [2021-06-05 12:57:44,403 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:57:44,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:57:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:57:44,404 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 12:57:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:57:44,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-06-05 12:57:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:44,405 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:57:44,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:57:44,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:57:44,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 12:57:44,629 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 12:57:44,630 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:44,631 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:44,631 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:44,631 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:44,631 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:44,631 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:44,631 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:44,631 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:44,631 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 12:57:44,632 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 12 transitions, 29 flow [2021-06-05 12:57:44,634 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 31 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 12:57:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 31 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 12:57:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:44,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:44,635 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-06-05 12:57:44,635 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 12:57:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1646156556, now seen corresponding path program 1 times [2021-06-05 12:57:44,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:44,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287504080] [2021-06-05 12:57:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:44,644 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:44,648 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:44,665 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 12:57:44,665 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 12:57:44,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 12:57:44,670 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 12:57:44,671 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 12:57:44,671 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 12:57:44,678 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 12:57:44,679 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:44,680 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:44,680 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:44,680 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:44,680 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:44,681 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:44,681 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:44,681 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:44,681 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:44,682 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 12:57:44,692 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 101 states, 94 states have (on average 2.148936170212766) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 94 states have (on average 2.148936170212766) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:57:44,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:44,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:57:44,694 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:44,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1848222, now seen corresponding path program 1 times [2021-06-05 12:57:44,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:44,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31131867] [2021-06-05 12:57:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,714 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 12:57:44,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:44,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31131867] [2021-06-05 12:57:44,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31131867] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:44,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:44,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:44,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560129351] [2021-06-05 12:57:44,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:44,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:44,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:44,717 INFO L87 Difference]: Start difference. First operand has 101 states, 94 states have (on average 2.148936170212766) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:44,732 INFO L93 Difference]: Finished difference Result 97 states and 198 transitions. [2021-06-05 12:57:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:44,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:57:44,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:44,734 INFO L225 Difference]: With dead ends: 97 [2021-06-05 12:57:44,735 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 12:57:44,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 12:57:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-06-05 12:57:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-06-05 12:57:44,744 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 4 [2021-06-05 12:57:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:44,744 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-06-05 12:57:44,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-06-05 12:57:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:44,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:44,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:44,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 12:57:44,745 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash -774691786, now seen corresponding path program 1 times [2021-06-05 12:57:44,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:44,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423616129] [2021-06-05 12:57:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:44,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:44,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423616129] [2021-06-05 12:57:44,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423616129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:44,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978668719] [2021-06-05 12:57:44,767 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 12:57:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:44,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978668719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:44,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:44,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408612617] [2021-06-05 12:57:44,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:44,817 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:44,831 INFO L93 Difference]: Finished difference Result 49 states and 94 transitions. [2021-06-05 12:57:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 12:57:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:44,832 INFO L225 Difference]: With dead ends: 49 [2021-06-05 12:57:44,832 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 12:57:44,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 12:57:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-06-05 12:57:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-06-05 12:57:44,839 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 7 [2021-06-05 12:57:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:44,840 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-06-05 12:57:44,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-06-05 12:57:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:44,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:44,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:45,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:45,049 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:45,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1984184067, now seen corresponding path program 1 times [2021-06-05 12:57:45,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:45,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007724748] [2021-06-05 12:57:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007724748] [2021-06-05 12:57:45,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007724748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765674973] [2021-06-05 12:57:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 12:57:45,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765674973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:45,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 12:57:45,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623029289] [2021-06-05 12:57:45,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:45,184 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:45,195 INFO L93 Difference]: Finished difference Result 31 states and 52 transitions. [2021-06-05 12:57:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 12:57:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:45,196 INFO L225 Difference]: With dead ends: 31 [2021-06-05 12:57:45,196 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:57:45,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:57:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:57:45,197 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 12:57:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:57:45,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-06-05 12:57:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:45,197 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:57:45,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:57:45,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:57:45,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:45,419 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 12:57:45,420 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:45,420 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:45,421 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:45,421 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:45,421 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:45,421 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:45,421 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:45,421 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:45,421 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 12:57:45,422 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-06-05 12:57:45,428 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 101 states, 94 states have (on average 2.148936170212766) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 94 states have (on average 2.148936170212766) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:45,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:45,429 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2021-06-05 12:57:45,429 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 12:57:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1984184086, now seen corresponding path program 1 times [2021-06-05 12:57:45,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:45,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294221455] [2021-06-05 12:57:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:45,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:45,458 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:45,460 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 12:57:45,460 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 12:57:45,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 12:57:45,460 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 12:57:45,460 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 12:57:45,460 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 12:57:45,499 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 12:57:45,500 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:45,501 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:45,501 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:45,501 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:45,501 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:45,501 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:45,501 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:45,501 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:45,501 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:45,502 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2021-06-05 12:57:45,517 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 308 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 307 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 307 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:57:45,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:45,518 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:57:45,518 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2402334, now seen corresponding path program 1 times [2021-06-05 12:57:45,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:45,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655143516] [2021-06-05 12:57:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,529 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 12:57:45,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:45,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655143516] [2021-06-05 12:57:45,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655143516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:45,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:45,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592598203] [2021-06-05 12:57:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:45,531 INFO L87 Difference]: Start difference. First operand has 308 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 307 states have internal predecessors, (811), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:45,547 INFO L93 Difference]: Finished difference Result 304 states and 807 transitions. [2021-06-05 12:57:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:57:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:45,551 INFO L225 Difference]: With dead ends: 304 [2021-06-05 12:57:45,552 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 12:57:45,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 12:57:45,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-06-05 12:57:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 169 states have (on average 2.5502958579881656) internal successors, (431), 171 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2021-06-05 12:57:45,569 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 4 [2021-06-05 12:57:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:45,569 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2021-06-05 12:57:45,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2021-06-05 12:57:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:45,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:45,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:45,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 12:57:45,571 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1446932922, now seen corresponding path program 1 times [2021-06-05 12:57:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:45,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834382517] [2021-06-05 12:57:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:45,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834382517] [2021-06-05 12:57:45,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834382517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618540736] [2021-06-05 12:57:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:57:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:45,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618540736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:45,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819098915] [2021-06-05 12:57:45,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:45,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:45,631 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:45,646 INFO L93 Difference]: Finished difference Result 166 states and 421 transitions. [2021-06-05 12:57:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 12:57:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:45,648 INFO L225 Difference]: With dead ends: 166 [2021-06-05 12:57:45,648 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 12:57:45,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 12:57:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-05 12:57:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 2.567073170731707) internal successors, (421), 165 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2021-06-05 12:57:45,660 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 7 [2021-06-05 12:57:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:45,661 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2021-06-05 12:57:45,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2021-06-05 12:57:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:45,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:45,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:45,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:45,877 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1287287939, now seen corresponding path program 1 times [2021-06-05 12:57:45,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:45,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432258066] [2021-06-05 12:57:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432258066] [2021-06-05 12:57:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432258066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876639124] [2021-06-05 12:57:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:57:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 12:57:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:45,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876639124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:45,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:45,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 12:57:45,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659264474] [2021-06-05 12:57:45,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:45,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:45,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:45,989 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:46,005 INFO L93 Difference]: Finished difference Result 148 states and 379 transitions. [2021-06-05 12:57:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 12:57:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:46,007 INFO L225 Difference]: With dead ends: 148 [2021-06-05 12:57:46,007 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 12:57:46,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 12:57:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-06-05 12:57:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.578231292517007) internal successors, (379), 147 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 379 transitions. [2021-06-05 12:57:46,017 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 379 transitions. Word has length 10 [2021-06-05 12:57:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 379 transitions. [2021-06-05 12:57:46,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 379 transitions. [2021-06-05 12:57:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 12:57:46,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:46,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:46,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 12:57:46,241 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash 167633733, now seen corresponding path program 1 times [2021-06-05 12:57:46,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:46,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102447039] [2021-06-05 12:57:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:46,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:46,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102447039] [2021-06-05 12:57:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102447039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746351604] [2021-06-05 12:57:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:57:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:46,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746351604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:46,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:46,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 12:57:46,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177484339] [2021-06-05 12:57:46,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:46,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:46,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:46,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:46,377 INFO L87 Difference]: Start difference. First operand 148 states and 379 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:46,391 INFO L93 Difference]: Finished difference Result 94 states and 217 transitions. [2021-06-05 12:57:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 12:57:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:46,392 INFO L225 Difference]: With dead ends: 94 [2021-06-05 12:57:46,392 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:57:46,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:57:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:57:46,392 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 12:57:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:57:46,392 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-06-05 12:57:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:46,393 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:57:46,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:57:46,393 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:57:46,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:46,616 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 12:57:46,617 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:46,617 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:46,617 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:46,617 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:46,617 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:46,617 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:46,617 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:46,618 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:46,618 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 12:57:46,618 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2021-06-05 12:57:46,625 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 308 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 307 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 307 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 12:57:46,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:46,627 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:46,627 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 12:57:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash 167633716, now seen corresponding path program 1 times [2021-06-05 12:57:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:46,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876035953] [2021-06-05 12:57:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:46,636 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:46,646 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:46,651 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 12:57:46,651 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 12:57:46,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 12:57:46,651 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 12:57:46,651 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 12:57:46,651 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 12:57:46,660 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 12:57:46,661 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:46,664 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:46,664 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:46,664 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:46,664 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:46,664 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:46,664 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:46,664 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:46,664 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:46,666 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 21 transitions, 74 flow [2021-06-05 12:57:46,698 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 929 states, 918 states have (on average 3.3246187363834423) internal successors, (3052), 928 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 929 states, 918 states have (on average 3.3246187363834423) internal successors, (3052), 928 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:57:46,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:46,701 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:57:46,701 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash 3048798, now seen corresponding path program 1 times [2021-06-05 12:57:46,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:46,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908836362] [2021-06-05 12:57:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:46,712 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 12:57:46,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908836362] [2021-06-05 12:57:46,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908836362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:46,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:46,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378235015] [2021-06-05 12:57:46,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:46,717 INFO L87 Difference]: Start difference. First operand has 929 states, 918 states have (on average 3.3246187363834423) internal successors, (3052), 928 states have internal predecessors, (3052), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:46,742 INFO L93 Difference]: Finished difference Result 925 states and 3048 transitions. [2021-06-05 12:57:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:57:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:46,751 INFO L225 Difference]: With dead ends: 925 [2021-06-05 12:57:46,752 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 12:57:46,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:46,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 12:57:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-06-05 12:57:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 519 states have (on average 3.1714836223506744) internal successors, (1646), 522 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1646 transitions. [2021-06-05 12:57:46,800 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1646 transitions. Word has length 4 [2021-06-05 12:57:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:46,801 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1646 transitions. [2021-06-05 12:57:46,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1646 transitions. [2021-06-05 12:57:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:46,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:46,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:46,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 12:57:46,802 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash 632087353, now seen corresponding path program 1 times [2021-06-05 12:57:46,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:46,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035764379] [2021-06-05 12:57:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:46,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035764379] [2021-06-05 12:57:46,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035764379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599486339] [2021-06-05 12:57:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:46,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599486339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:46,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:46,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:46,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545082627] [2021-06-05 12:57:46,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:46,898 INFO L87 Difference]: Start difference. First operand 523 states and 1646 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:46,925 INFO L93 Difference]: Finished difference Result 517 states and 1636 transitions. [2021-06-05 12:57:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 12:57:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:46,928 INFO L225 Difference]: With dead ends: 517 [2021-06-05 12:57:46,929 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 12:57:46,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 12:57:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2021-06-05 12:57:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 514 states have (on average 3.1828793774319064) internal successors, (1636), 516 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1636 transitions. [2021-06-05 12:57:46,948 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1636 transitions. Word has length 7 [2021-06-05 12:57:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:46,949 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1636 transitions. [2021-06-05 12:57:46,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1636 transitions. [2021-06-05 12:57:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:46,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:46,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:47,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 12:57:47,174 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:47,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1377396701, now seen corresponding path program 1 times [2021-06-05 12:57:47,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:47,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860175272] [2021-06-05 12:57:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:47,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860175272] [2021-06-05 12:57:47,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860175272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:47,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038994763] [2021-06-05 12:57:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order 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 12:57:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 12:57:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:47,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038994763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:47,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:47,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 12:57:47,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340337660] [2021-06-05 12:57:47,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:47,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:47,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:47,253 INFO L87 Difference]: Start difference. First operand 517 states and 1636 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:47,273 INFO L93 Difference]: Finished difference Result 499 states and 1594 transitions. [2021-06-05 12:57:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:47,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 12:57:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:47,276 INFO L225 Difference]: With dead ends: 499 [2021-06-05 12:57:47,276 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 12:57:47,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 12:57:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2021-06-05 12:57:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 497 states have (on average 3.2072434607645874) internal successors, (1594), 498 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1594 transitions. [2021-06-05 12:57:47,292 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1594 transitions. Word has length 10 [2021-06-05 12:57:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:47,292 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1594 transitions. [2021-06-05 12:57:47,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1594 transitions. [2021-06-05 12:57:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 12:57:47,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:47,293 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:47,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 12:57:47,516 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash -92707560, now seen corresponding path program 1 times [2021-06-05 12:57:47,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:47,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100845428] [2021-06-05 12:57:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:47,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:47,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100845428] [2021-06-05 12:57:47,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100845428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:47,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271749770] [2021-06-05 12:57:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:47,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:47,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271749770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:47,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:47,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 12:57:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934908710] [2021-06-05 12:57:47,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:47,651 INFO L87 Difference]: Start difference. First operand 499 states and 1594 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:47,679 INFO L93 Difference]: Finished difference Result 445 states and 1432 transitions. [2021-06-05 12:57:47,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:47,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 12:57:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:47,683 INFO L225 Difference]: With dead ends: 445 [2021-06-05 12:57:47,683 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 12:57:47,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 12:57:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2021-06-05 12:57:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.225225225225225) internal successors, (1432), 444 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1432 transitions. [2021-06-05 12:57:47,701 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1432 transitions. Word has length 13 [2021-06-05 12:57:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:47,702 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1432 transitions. [2021-06-05 12:57:47,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1432 transitions. [2021-06-05 12:57:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:47,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:47,704 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:47,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 12:57:47,928 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash -187199908, now seen corresponding path program 1 times [2021-06-05 12:57:47,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:47,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516224] [2021-06-05 12:57:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:47,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516224] [2021-06-05 12:57:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450360820] [2021-06-05 12:57:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-06-05 12:57:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:48,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 12:57:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450360820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 12:57:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104155028] [2021-06-05 12:57:48,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:48,056 INFO L87 Difference]: Start difference. First operand 445 states and 1432 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:48,077 INFO L93 Difference]: Finished difference Result 283 states and 838 transitions. [2021-06-05 12:57:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 12:57:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 12:57:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:48,078 INFO L225 Difference]: With dead ends: 283 [2021-06-05 12:57:48,078 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 12:57:48,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 12:57:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 12:57:48,079 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 12:57:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 12:57:48,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-06-05 12:57:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:48,079 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 12:57:48,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 12:57:48,080 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 12:57:48,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 12:57:48,300 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 12:57:48,300 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:48,301 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:48,301 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:48,302 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:48,302 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:48,302 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:48,302 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:48,302 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:48,302 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 12:57:48,302 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 21 transitions, 74 flow [2021-06-05 12:57:48,326 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 929 states, 918 states have (on average 3.3246187363834423) internal successors, (3052), 928 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 929 states, 918 states have (on average 3.3246187363834423) internal successors, (3052), 928 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:48,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:48,330 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:48,330 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 12:57:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash -187199923, now seen corresponding path program 1 times [2021-06-05 12:57:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:48,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644726524] [2021-06-05 12:57:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:48,338 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:48,342 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:48,344 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 12:57:48,344 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 12:57:48,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 12:57:48,345 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 12:57:48,345 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 12:57:48,345 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 12:57:48,353 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 12:57:48,353 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 12:57:48,354 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 12:57:48,354 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 12:57:48,354 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 12:57:48,354 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 12:57:48,354 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 12:57:48,354 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 12:57:48,355 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 12:57:48,355 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 12:57:48,355 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 24 transitions, 93 flow [2021-06-05 12:57:48,480 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2792 states, 2779 states have (on average 3.9643756747031307) internal successors, (11017), 2791 states have internal predecessors, (11017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 2792 states, 2779 states have (on average 3.9643756747031307) internal successors, (11017), 2791 states have internal predecessors, (11017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 12:57:48,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:48,500 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 12:57:48,501 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash 3787614, now seen corresponding path program 1 times [2021-06-05 12:57:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:48,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900619484] [2021-06-05 12:57:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:48,511 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 12:57:48,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:48,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900619484] [2021-06-05 12:57:48,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900619484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 12:57:48,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 12:57:48,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 12:57:48,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243521884] [2021-06-05 12:57:48,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 12:57:48,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 12:57:48,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:48,521 INFO L87 Difference]: Start difference. First operand has 2792 states, 2779 states have (on average 3.9643756747031307) internal successors, (11017), 2791 states have internal predecessors, (11017), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:48,560 INFO L93 Difference]: Finished difference Result 2788 states and 11013 transitions. [2021-06-05 12:57:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 12:57:48,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-06-05 12:57:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:48,572 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 12:57:48,572 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 12:57:48,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 12:57:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 12:57:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1576. [2021-06-05 12:57:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1571 states have (on average 3.8147676639083388) internal successors, (5993), 1575 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5993 transitions. [2021-06-05 12:57:48,630 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5993 transitions. Word has length 4 [2021-06-05 12:57:48,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:48,630 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5993 transitions. [2021-06-05 12:57:48,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5993 transitions. [2021-06-05 12:57:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 12:57:48,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:48,630 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:48,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 12:57:48,631 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1167401743, now seen corresponding path program 1 times [2021-06-05 12:57:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948017297] [2021-06-05 12:57:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:48,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948017297] [2021-06-05 12:57:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948017297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738751367] [2021-06-05 12:57:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:57:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 12:57:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738751367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:48,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:48,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 12:57:48,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028532699] [2021-06-05 12:57:48,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 12:57:48,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 12:57:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:48,700 INFO L87 Difference]: Start difference. First operand 1576 states and 5993 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:48,731 INFO L93 Difference]: Finished difference Result 1570 states and 5983 transitions. [2021-06-05 12:57:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 12:57:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 12:57:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:48,742 INFO L225 Difference]: With dead ends: 1570 [2021-06-05 12:57:48,742 INFO L226 Difference]: Without dead ends: 1570 [2021-06-05 12:57:48,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 12:57:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-06-05 12:57:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2021-06-05 12:57:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1566 states have (on average 3.8205619412515963) internal successors, (5983), 1569 states have internal predecessors, (5983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5983 transitions. [2021-06-05 12:57:48,805 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5983 transitions. Word has length 7 [2021-06-05 12:57:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:48,805 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5983 transitions. [2021-06-05 12:57:48,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5983 transitions. [2021-06-05 12:57:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 12:57:48,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:48,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:49,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:49,021 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1714902557, now seen corresponding path program 1 times [2021-06-05 12:57:49,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:49,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279423841] [2021-06-05 12:57:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:49,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279423841] [2021-06-05 12:57:49,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279423841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:49,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387653383] [2021-06-05 12:57:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 12:57:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:49,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387653383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:49,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:49,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 12:57:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931953619] [2021-06-05 12:57:49,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 12:57:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 12:57:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:49,120 INFO L87 Difference]: Start difference. First operand 1570 states and 5983 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:49,154 INFO L93 Difference]: Finished difference Result 1552 states and 5941 transitions. [2021-06-05 12:57:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 12:57:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 12:57:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:49,164 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 12:57:49,165 INFO L226 Difference]: Without dead ends: 1552 [2021-06-05 12:57:49,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 12:57:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-06-05 12:57:49,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1552. [2021-06-05 12:57:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1549 states have (on average 3.8353776630083924) internal successors, (5941), 1551 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5941 transitions. [2021-06-05 12:57:49,222 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5941 transitions. Word has length 10 [2021-06-05 12:57:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:49,223 INFO L482 AbstractCegarLoop]: Abstraction has 1552 states and 5941 transitions. [2021-06-05 12:57:49,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5941 transitions. [2021-06-05 12:57:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 12:57:49,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:49,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:49,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:49,448 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 25892014, now seen corresponding path program 1 times [2021-06-05 12:57:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345015959] [2021-06-05 12:57:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:49,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345015959] [2021-06-05 12:57:49,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345015959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932109652] [2021-06-05 12:57:49,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 12:57:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932109652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:49,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:49,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 12:57:49,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069867568] [2021-06-05 12:57:49,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 12:57:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 12:57:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:49,577 INFO L87 Difference]: Start difference. First operand 1552 states and 5941 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:49,623 INFO L93 Difference]: Finished difference Result 1498 states and 5779 transitions. [2021-06-05 12:57:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 12:57:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 12:57:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:49,637 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 12:57:49,638 INFO L226 Difference]: Without dead ends: 1498 [2021-06-05 12:57:49,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 12:57:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-06-05 12:57:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1498. [2021-06-05 12:57:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1496 states have (on average 3.8629679144385025) internal successors, (5779), 1497 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 5779 transitions. [2021-06-05 12:57:49,691 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 5779 transitions. Word has length 13 [2021-06-05 12:57:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:49,692 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 5779 transitions. [2021-06-05 12:57:49,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 5779 transitions. [2021-06-05 12:57:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 12:57:49,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:49,694 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:49,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 12:57:49,905 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1745292068, now seen corresponding path program 1 times [2021-06-05 12:57:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:49,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038926832] [2021-06-05 12:57:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:49,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 12:57:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038926832] [2021-06-05 12:57:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038926832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:49,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974567949] [2021-06-05 12:57:49,987 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 12:57:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 12:57:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 12:57:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 12:57:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 12:57:50,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974567949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 12:57:50,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 12:57:50,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 12:57:50,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761523976] [2021-06-05 12:57:50,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 12:57:50,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 12:57:50,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 12:57:50,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:50,057 INFO L87 Difference]: Start difference. First operand 1498 states and 5779 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 12:57:50,088 INFO L93 Difference]: Finished difference Result 1336 states and 5185 transitions. [2021-06-05 12:57:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 12:57:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 12:57:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 12:57:50,096 INFO L225 Difference]: With dead ends: 1336 [2021-06-05 12:57:50,097 INFO L226 Difference]: Without dead ends: 1336 [2021-06-05 12:57:50,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 12:57:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-05 12:57:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1336. [2021-06-05 12:57:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.8838951310861423) internal successors, (5185), 1335 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 5185 transitions. [2021-06-05 12:57:50,142 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 5185 transitions. Word has length 16 [2021-06-05 12:57:50,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 12:57:50,142 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 5185 transitions. [2021-06-05 12:57:50,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 12:57:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 5185 transitions. [2021-06-05 12:57:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 12:57:50,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 12:57:50,143 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 12:57:50,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 12:57:50,367 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 12:57:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 12:57:50,367 INFO L82 PathProgramCache]: Analyzing trace with hash 877949517, now seen corresponding path program 1 times [2021-06-05 12:57:50,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 12:57:50,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365870327] [2021-06-05 12:57:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 12:57:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:50,372 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 12:57:50,376 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 12:57:50,377 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 12:57:50,378 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 12:57:50,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 12:57:50,378 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2021-06-05 12:57:50,381 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-06-05 12:57:50,392 INFO L202 PluginConnector]: Adding new model bigNumberOfThreads.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 12:57:50 BasicIcfg [2021-06-05 12:57:50,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 12:57:50,392 INFO L168 Benchmark]: Toolchain (without parser) took 6836.30 ms. Allocated memory is still 373.3 MB. Free memory was 353.0 MB in the beginning and 285.9 MB in the end (delta: 67.2 MB). Peak memory consumption was 70.2 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:50,392 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 373.3 MB. Free memory is still 353.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 12:57:50,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.82 ms. Allocated memory is still 373.3 MB. Free memory was 352.9 MB in the beginning and 351.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:50,393 INFO L168 Benchmark]: Boogie Preprocessor took 12.60 ms. Allocated memory is still 373.3 MB. Free memory was 351.5 MB in the beginning and 350.5 MB in the end (delta: 966.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:50,393 INFO L168 Benchmark]: RCFGBuilder took 196.14 ms. Allocated memory is still 373.3 MB. Free memory was 350.5 MB in the beginning and 341.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:50,393 INFO L168 Benchmark]: TraceAbstraction took 6595.59 ms. Allocated memory is still 373.3 MB. Free memory was 341.0 MB in the beginning and 285.9 MB in the end (delta: 55.2 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.0 GB. [2021-06-05 12:57:50,409 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 0.12 ms. Allocated memory is still 373.3 MB. Free memory is still 353.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.82 ms. Allocated memory is still 373.3 MB. Free memory was 352.9 MB in the beginning and 351.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.60 ms. Allocated memory is still 373.3 MB. Free memory was 351.5 MB in the beginning and 350.5 MB in the end (delta: 966.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 196.14 ms. Allocated memory is still 373.3 MB. Free memory was 350.5 MB in the beginning and 341.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6595.59 ms. Allocated memory is still 373.3 MB. Free memory was 341.0 MB in the beginning and 285.9 MB in the end (delta: 55.2 MB). Peak memory consumption was 57.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: assertion can be violated assertion can be violated We found a FailurePath: [L26] 0 x := 0; VAL [x=0] [L27] 0 i := 0; VAL [i=0, x=0] [L29] COND TRUE 0 i < 5 VAL [i=0, x=0] [L30] FORK 0 fork i thread(); VAL [i=0, x=0] [L31] 0 i := i + 1; VAL [i=1, x=0] [L29] COND TRUE 0 i < 5 VAL [i=1, x=0] [L30] FORK 0 fork i thread(); VAL [i=1, x=0] [L31] 0 i := i + 1; VAL [i=2, x=0] [L29] COND TRUE 0 i < 5 VAL [i=2, x=0] [L30] FORK 0 fork i thread(); VAL [i=2, x=0] [L31] 0 i := i + 1; VAL [i=3, x=0] [L29] COND TRUE 0 i < 5 VAL [i=3, x=0] [L30] FORK 0 fork i thread(); VAL [i=3, x=0] [L31] 0 i := i + 1; VAL [i=4, x=0] [L29] COND TRUE 0 i < 5 VAL [i=4, x=0] [L30] FORK 0 fork i thread(); VAL [i=4, x=0] [L31] 0 i := i + 1; VAL [i=5, x=0] [L29] COND FALSE 0 !(i < 5) VAL [i=5, x=0] [L33] 0 assert x > 0; VAL [i=5, x=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 735.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 78.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 10 SDslu, 11 SDs, 0 SdLazy, 10 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.6ms SsaConstructionTime, 24.1ms SatisfiabilityAnalysisTime, 157.9ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 33 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 738.9ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 1.9ms, AutomataDifference: 49.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 30 SDslu, 31 SDs, 0 SdLazy, 25 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.5ms SsaConstructionTime, 14.0ms SatisfiabilityAnalysisTime, 137.8ms InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 79 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/12 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1115.6ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 2.8ms, AutomataDifference: 73.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44 SDtfs, 56 SDslu, 73 SDs, 0 SdLazy, 50 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.3ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.3ms SsaConstructionTime, 32.5ms SatisfiabilityAnalysisTime, 177.2ms InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 143 SizeOfPredicates, 0 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/36 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1637.2ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 7.3ms, AutomataDifference: 150.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 67 SDtfs, 96 SDslu, 140 SDs, 0 SdLazy, 86 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=929occurred in iteration=0, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 99.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.8ms SsaConstructionTime, 31.7ms SatisfiabilityAnalysisTime, 280.8ms InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/80 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 - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2023.7ms, OverallIterations: 6, TraceHistogramMax: 5, EmptinessCheckTime: 23.9ms, AutomataDifference: 251.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 125.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 83 SDtfs, 100 SDslu, 183 SDs, 0 SdLazy, 109 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2792occurred in iteration=0, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 273.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.2ms SsaConstructionTime, 25.1ms SatisfiabilityAnalysisTime, 268.6ms InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 SizeOfPredicates, 0 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/80 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.1ms, OverallIterations: 1, TraceHistogramMax: 2, EmptinessCheckTime: 0.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4ms SsaConstructionTime, 3.8ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.4ms, OverallIterations: 1, TraceHistogramMax: 3, EmptinessCheckTime: 1.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4ms SsaConstructionTime, 3.3ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 3 thread instances CFG has 5 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 34.0ms, OverallIterations: 1, TraceHistogramMax: 4, EmptinessCheckTime: 1.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5ms SsaConstructionTime, 3.6ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 4 thread instances CFG has 6 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 43.5ms, OverallIterations: 1, TraceHistogramMax: 5, EmptinessCheckTime: 3.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=929occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8ms SsaConstructionTime, 3.9ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 5 thread instances CFG has 7 procedures, 28 locations, 2 error locations. Started 0 CEGAR loops. No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...