/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/regression/showcase/Fischer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:13:35,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:13:35,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:13:35,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:13:35,445 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 13:13:35,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:13:35,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:13:35,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:13:35,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:13:35,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:13:35,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:13:35,471 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:13:35,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:13:35,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:13:35,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:13:35,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:13:35,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:13:35,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:13:35,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:13:35,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:13:35,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:13:35,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:13:35,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:13:35,474 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:13:35,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:13:35,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:13:35,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:13:35,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:13:35,776 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:13:35,777 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:13:35,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl [2021-06-05 13:13:35,778 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl' [2021-06-05 13:13:35,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:13:35,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:13:35,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:35,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:13:35,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:13:35,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:13:35,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:13:35,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:13:35,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:13:35,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/1) ... [2021-06-05 13:13:35,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:13:35,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:13:35,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:13:35,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:13:35,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (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 13:13:35,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process2 given in one single declaration [2021-06-05 13:13:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure Process2 [2021-06-05 13:13:35,926 INFO L138 BoogieDeclarations]: Found implementation of procedure Process2 [2021-06-05 13:13:35,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-05 13:13:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-05 13:13:35,926 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-05 13:13:35,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:13:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:13:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:13:35,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Clock given in one single declaration [2021-06-05 13:13:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure Clock [2021-06-05 13:13:35,927 INFO L138 BoogieDeclarations]: Found implementation of procedure Clock [2021-06-05 13:13:35,928 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 13:13:36,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:13:36,126 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 13:13:36,127 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:36 BoogieIcfgContainer [2021-06-05 13:13:36,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:13:36,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:13:36,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:13:36,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:13:36,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:13:35" (1/2) ... [2021-06-05 13:13:36,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8099e1 and model type Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:13:36, skipping insertion in model container [2021-06-05 13:13:36,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:13:36" (2/2) ... [2021-06-05 13:13:36,143 INFO L111 eAbstractionObserver]: Analyzing ICFG Fischer.bpl [2021-06-05 13:13:36,148 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:13:36,160 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:13:36,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 13:13:36,162 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:13:36,199 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,200 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,201 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,201 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,201 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,201 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,202 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,202 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,203 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,203 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,204 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,204 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,205 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,205 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,205 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,205 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,226 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,227 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:13:36,229 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:13:36,256 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 13:13:36,288 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:13:36,288 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:13:36,288 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:13:36,288 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:13:36,288 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:13:36,288 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:13:36,289 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:13:36,289 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:13:36,304 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 13:13:36,403 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:13:36,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:36,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:36,417 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -559778971, now seen corresponding path program 1 times [2021-06-05 13:13:36,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:36,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666399049] [2021-06-05 13:13:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:36,538 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 13:13:36,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:36,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666399049] [2021-06-05 13:13:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666399049] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:36,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:36,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 13:13:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816419225] [2021-06-05 13:13:36,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,558 INFO L87 Difference]: Start difference. First operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 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, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:36,627 INFO L93 Difference]: Finished difference Result 398 states and 1386 transitions. [2021-06-05 13:13:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:36,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:13:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:36,644 INFO L225 Difference]: With dead ends: 398 [2021-06-05 13:13:36,644 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 13:13:36,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 13:13:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 394. [2021-06-05 13:13:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 394 states have (on average 3.482233502538071) internal successors, (1372), 393 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1372 transitions. [2021-06-05 13:13:36,734 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1372 transitions. Word has length 8 [2021-06-05 13:13:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:36,735 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1372 transitions. [2021-06-05 13:13:36,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1372 transitions. [2021-06-05 13:13:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:13:36,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:36,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:36,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:13:36,738 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash 403321209, now seen corresponding path program 1 times [2021-06-05 13:13:36,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:36,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002038972] [2021-06-05 13:13:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:36,769 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 13:13:36,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002038972] [2021-06-05 13:13:36,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002038972] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:36,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:36,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:36,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416195118] [2021-06-05 13:13:36,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:36,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:36,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:36,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,773 INFO L87 Difference]: Start difference. First operand 394 states and 1372 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:36,811 INFO L93 Difference]: Finished difference Result 619 states and 2131 transitions. [2021-06-05 13:13:36,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:13:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:36,817 INFO L225 Difference]: With dead ends: 619 [2021-06-05 13:13:36,817 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 13:13:36,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 13:13:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 403. [2021-06-05 13:13:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 403 states have (on average 3.332506203473945) internal successors, (1343), 402 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1343 transitions. [2021-06-05 13:13:36,847 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1343 transitions. Word has length 12 [2021-06-05 13:13:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:36,847 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1343 transitions. [2021-06-05 13:13:36,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1343 transitions. [2021-06-05 13:13:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:13:36,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:36,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:13:36,850 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1014480893, now seen corresponding path program 1 times [2021-06-05 13:13:36,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:36,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530272549] [2021-06-05 13:13:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:36,870 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 13:13:36,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:36,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530272549] [2021-06-05 13:13:36,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530272549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:36,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:36,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:36,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370986514] [2021-06-05 13:13:36,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,873 INFO L87 Difference]: Start difference. First operand 403 states and 1343 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:36,924 INFO L93 Difference]: Finished difference Result 511 states and 1701 transitions. [2021-06-05 13:13:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:36,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:13:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:36,928 INFO L225 Difference]: With dead ends: 511 [2021-06-05 13:13:36,928 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 13:13:36,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 13:13:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 459. [2021-06-05 13:13:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 459 states have (on average 3.318082788671024) internal successors, (1523), 458 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1523 transitions. [2021-06-05 13:13:36,965 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1523 transitions. Word has length 12 [2021-06-05 13:13:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1523 transitions. [2021-06-05 13:13:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1523 transitions. [2021-06-05 13:13:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:13:36,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:36,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:36,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:13:36,968 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1612610670, now seen corresponding path program 1 times [2021-06-05 13:13:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:36,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482716930] [2021-06-05 13:13:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,008 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 13:13:37,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482716930] [2021-06-05 13:13:37,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482716930] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:37,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008986624] [2021-06-05 13:13:37,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:37,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:37,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:37,012 INFO L87 Difference]: Start difference. First operand 459 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,051 INFO L93 Difference]: Finished difference Result 531 states and 1759 transitions. [2021-06-05 13:13:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:13:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,056 INFO L225 Difference]: With dead ends: 531 [2021-06-05 13:13:37,056 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 13:13:37,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 13:13:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 507. [2021-06-05 13:13:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 507 states have (on average 3.3037475345167655) internal successors, (1675), 506 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1675 transitions. [2021-06-05 13:13:37,078 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1675 transitions. Word has length 19 [2021-06-05 13:13:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,078 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1675 transitions. [2021-06-05 13:13:37,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1675 transitions. [2021-06-05 13:13:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:13:37,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:37,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:37,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:13:37,084 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -654209534, now seen corresponding path program 1 times [2021-06-05 13:13:37,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:37,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192055972] [2021-06-05 13:13:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,129 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 13:13:37,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192055972] [2021-06-05 13:13:37,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192055972] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:13:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216657535] [2021-06-05 13:13:37,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:13:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:13:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:37,137 INFO L87 Difference]: Start difference. First operand 507 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,170 INFO L93 Difference]: Finished difference Result 543 states and 1776 transitions. [2021-06-05 13:13:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:13:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 13:13:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,173 INFO L225 Difference]: With dead ends: 543 [2021-06-05 13:13:37,173 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 13:13:37,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:13:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 13:13:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 423. [2021-06-05 13:13:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 423 states have (on average 3.224586288416076) internal successors, (1364), 422 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1364 transitions. [2021-06-05 13:13:37,191 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1364 transitions. Word has length 19 [2021-06-05 13:13:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,192 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1364 transitions. [2021-06-05 13:13:37,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1364 transitions. [2021-06-05 13:13:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 13:13:37,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:37,194 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:37,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:13:37,194 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2077228235, now seen corresponding path program 1 times [2021-06-05 13:13:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:37,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360243355] [2021-06-05 13:13:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,264 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 13:13:37,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360243355] [2021-06-05 13:13:37,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360243355] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:37,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64574049] [2021-06-05 13:13:37,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:13:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:13:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:13:37,270 INFO L87 Difference]: Start difference. First operand 423 states and 1364 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,309 INFO L93 Difference]: Finished difference Result 444 states and 1408 transitions. [2021-06-05 13:13:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:13:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 13:13:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,313 INFO L225 Difference]: With dead ends: 444 [2021-06-05 13:13:37,314 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 13:13:37,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 13:13:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-06-05 13:13:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 444 states have (on average 3.171171171171171) internal successors, (1408), 443 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1408 transitions. [2021-06-05 13:13:37,328 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1408 transitions. Word has length 26 [2021-06-05 13:13:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,329 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1408 transitions. [2021-06-05 13:13:37,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1408 transitions. [2021-06-05 13:13:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:13:37,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:37,331 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:37,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:13:37,331 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:37,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1176227774, now seen corresponding path program 1 times [2021-06-05 13:13:37,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:37,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633514471] [2021-06-05 13:13:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,393 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 13:13:37,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633514471] [2021-06-05 13:13:37,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633514471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:37,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413644921] [2021-06-05 13:13:37,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:13:37,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:13:37,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:37,396 INFO L87 Difference]: Start difference. First operand 444 states and 1408 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,491 INFO L93 Difference]: Finished difference Result 514 states and 1595 transitions. [2021-06-05 13:13:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:13:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:13:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,494 INFO L225 Difference]: With dead ends: 514 [2021-06-05 13:13:37,494 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 13:13:37,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:13:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 13:13:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2021-06-05 13:13:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 430 states have (on average 3.1790697674418604) internal successors, (1367), 429 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1367 transitions. [2021-06-05 13:13:37,509 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1367 transitions. Word has length 27 [2021-06-05 13:13:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,509 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1367 transitions. [2021-06-05 13:13:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1367 transitions. [2021-06-05 13:13:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:13:37,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:37,511 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:37,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:13:37,511 INFO L430 AbstractCegarLoop]: === Iteration 8 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash 505032694, now seen corresponding path program 2 times [2021-06-05 13:13:37,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:37,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901885434] [2021-06-05 13:13:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,560 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 13:13:37,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901885434] [2021-06-05 13:13:37,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901885434] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:13:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788896286] [2021-06-05 13:13:37,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:13:37,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:13:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:13:37,566 INFO L87 Difference]: Start difference. First operand 430 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,592 INFO L93 Difference]: Finished difference Result 450 states and 1409 transitions. [2021-06-05 13:13:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:13:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:13:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,596 INFO L225 Difference]: With dead ends: 450 [2021-06-05 13:13:37,596 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 13:13:37,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:13:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 13:13:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2021-06-05 13:13:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 450 states have (on average 3.131111111111111) internal successors, (1409), 449 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1409 transitions. [2021-06-05 13:13:37,611 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1409 transitions. Word has length 27 [2021-06-05 13:13:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,613 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1409 transitions. [2021-06-05 13:13:37,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1409 transitions. [2021-06-05 13:13:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 13:13:37,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:37,615 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:37,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:13:37,615 INFO L430 AbstractCegarLoop]: === Iteration 9 === [Process1Err0ASSERT_VIOLATIONASSERT, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process2Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:13:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2085574249, now seen corresponding path program 3 times [2021-06-05 13:13:37,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:37,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324836719] [2021-06-05 13:13:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:13:37,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324836719] [2021-06-05 13:13:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324836719] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:37,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:37,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:37,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23282603] [2021-06-05 13:13:37,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:13:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:37,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:13:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:13:37,673 INFO L87 Difference]: Start difference. First operand 450 states and 1409 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:37,767 INFO L93 Difference]: Finished difference Result 244 states and 724 transitions. [2021-06-05 13:13:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:13:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 13:13:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:37,772 INFO L225 Difference]: With dead ends: 244 [2021-06-05 13:13:37,772 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:13:37,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:13:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:13:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:13:37,778 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 13:13:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:13:37,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-05 13:13:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:37,778 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:13:37,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:13:37,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:13:37,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:13:37,781 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:13:37,784 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:13:37 BasicIcfg [2021-06-05 13:13:37,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:13:37,786 INFO L168 Benchmark]: Toolchain (without parser) took 1968.42 ms. Allocated memory is still 362.8 MB. Free memory was 342.8 MB in the beginning and 172.2 MB in the end (delta: 170.6 MB). Peak memory consumption was 172.0 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:37,786 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 343.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:13:37,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.02 ms. Allocated memory is still 362.8 MB. Free memory was 342.7 MB in the beginning and 341.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:37,789 INFO L168 Benchmark]: Boogie Preprocessor took 16.71 ms. Allocated memory is still 362.8 MB. Free memory was 341.3 MB in the beginning and 340.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:13:37,790 INFO L168 Benchmark]: RCFGBuilder took 279.45 ms. Allocated memory is still 362.8 MB. Free memory was 340.2 MB in the beginning and 327.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:37,791 INFO L168 Benchmark]: TraceAbstraction took 1646.25 ms. Allocated memory is still 362.8 MB. Free memory was 327.2 MB in the beginning and 172.2 MB in the end (delta: 155.1 MB). Peak memory consumption was 155.2 MB. Max. memory is 16.0 GB. [2021-06-05 13:13:37,793 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 343.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.02 ms. Allocated memory is still 362.8 MB. Free memory was 342.7 MB in the beginning and 341.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.71 ms. Allocated memory is still 362.8 MB. Free memory was 341.3 MB in the beginning and 340.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 279.45 ms. Allocated memory is still 362.8 MB. Free memory was 340.2 MB in the beginning and 327.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1646.25 ms. Allocated memory is still 362.8 MB. Free memory was 327.2 MB in the beginning and 172.2 MB in the end (delta: 155.1 MB). Peak memory consumption was 155.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 57]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 78]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1493.6ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 27.6ms, AutomataDifference: 572.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 114.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 412 SDtfs, 276 SDslu, 369 SDs, 0 SdLazy, 210 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 212.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 148.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 222.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 224 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.7ms SsaConstructionTime, 124.8ms SatisfiabilityAnalysisTime, 249.0ms InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 427 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...