/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:32:20,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:32:20,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:32:20,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 20:32:20,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 20:32:20,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 20:32:20,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 20:32:20,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 20:32:20,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 20:32:20,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 20:32:20,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 20:32:20,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 20:32:20,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 20:32:20,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 20:32:20,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 20:32:20,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 20:32:20,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 20:32:20,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 20:32:20,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 20:32:20,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 20:32:20,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 20:32:20,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 20:32:20,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 20:32:20,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 20:32:20,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 20:32:20,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 20:32:20,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 20:32:20,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 20:32:20,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 20:32:20,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 20:32:20,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 20:32:20,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 20:32:20,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 20:32:20,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 20:32:20,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 20:32:20,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 20:32:20,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 20:32:20,634 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:32:20,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:32:20,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:32:20,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:32:20,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:32:20,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:32:20,638 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:32:20,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:32:20,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:32:20,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:32:20,640 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:32:20,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:32:20,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:32:20,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:32:20,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:32:20,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:32:20,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:32:20,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:32:20,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:32:20,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:32:20,982 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:32:20,996 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:32:20,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl [2021-03-10 20:32:20,997 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_local.bpl' [2021-03-10 20:32:21,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:32:21,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:32:21,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:32:21,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:32:21,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:32:21,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:32:21,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:32:21,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:32:21,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:32:21,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... [2021-03-10 20:32:21,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:32:21,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:32:21,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:32:21,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:32:21,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:32:21,147 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:32:21,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:32:21,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:32:21,147 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-03-10 20:32:21,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-03-10 20:32:21,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-03-10 20:32:21,148 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:32:21,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:32:21,256 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-03-10 20:32:21,258 INFO L202 PluginConnector]: Adding new model fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:32:21 BoogieIcfgContainer [2021-03-10 20:32:21,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:32:21,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:32:21,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:32:21,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:32:21,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:32:21" (1/2) ... [2021-03-10 20:32:21,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ef08d8 and model type fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:32:21, skipping insertion in model container [2021-03-10 20:32:21,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_local.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:32:21" (2/2) ... [2021-03-10 20:32:21,265 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_local.bpl [2021-03-10 20:32:21,272 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:32:21,272 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:32:21,276 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:32:21,276 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:32:21,299 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,300 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,300 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,301 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,307 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,326 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:21,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:32:21,372 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:21,372 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:21,372 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:21,372 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:21,372 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:21,372 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:21,373 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:21,373 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:21,382 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 9 transitions, 23 flow [2021-03-10 20:32:21,392 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 16 states have (on average 1.875) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-03-10 20:32:21,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:21,399 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-03-10 20:32:21,400 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-10 20:32:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash 42154, now seen corresponding path program 1 times [2021-03-10 20:32:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:21,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953738048] [2021-03-10 20:32:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:21,477 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:21,487 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:21,501 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:32:21,502 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:32:21,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:32:21,504 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:32:21,504 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-10 20:32:21,514 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,514 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,516 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,516 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,518 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,518 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,519 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,520 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,521 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,524 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,527 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:21,527 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:32:21,530 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:21,530 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:21,530 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:21,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:21,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:21,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:21,531 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:21,531 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:21,532 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 42 flow [2021-03-10 20:32:21,548 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 123 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 122 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 112 states have (on average 2.4732142857142856) internal successors, (277), 122 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-03-10 20:32:21,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:21,552 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-03-10 20:32:21,552 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1773586, now seen corresponding path program 1 times [2021-03-10 20:32:21,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:21,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712012375] [2021-03-10 20:32:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:21,565 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:21,567 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:21,568 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:32:21,568 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:32:21,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:32:21,568 WARN L342 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:32:21,569 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-03-10 20:32:21,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,587 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,587 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,587 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,587 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,588 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,588 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,588 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,588 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,589 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,590 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,592 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:21,593 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:21,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 20:32:21,595 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:21,595 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:21,595 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:21,595 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:21,595 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:21,595 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:21,595 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:21,595 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:21,597 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 21 transitions, 63 flow [2021-03-10 20:32:21,634 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:32:21,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:21,637 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:32:21,637 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 75168682, now seen corresponding path program 1 times [2021-03-10 20:32:21,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:21,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153386898] [2021-03-10 20:32:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:21,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153386898] [2021-03-10 20:32:21,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:21,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:32:21,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642089195] [2021-03-10 20:32:21,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:32:21,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:21,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:32:21,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:21,747 INFO L87 Difference]: Start difference. First operand has 735 states, 712 states have (on average 3.186797752808989) internal successors, (2269), 734 states have internal predecessors, (2269), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:21,946 INFO L93 Difference]: Finished difference Result 1725 states and 4897 transitions. [2021-03-10 20:32:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:32:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-10 20:32:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:21,982 INFO L225 Difference]: With dead ends: 1725 [2021-03-10 20:32:21,982 INFO L226 Difference]: Without dead ends: 1629 [2021-03-10 20:32:21,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-03-10 20:32:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 993. [2021-03-10 20:32:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 975 states have (on average 3.0574358974358975) internal successors, (2981), 992 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2981 transitions. [2021-03-10 20:32:22,137 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2981 transitions. Word has length 5 [2021-03-10 20:32:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:22,138 INFO L480 AbstractCegarLoop]: Abstraction has 993 states and 2981 transitions. [2021-03-10 20:32:22,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2981 transitions. [2021-03-10 20:32:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:32:22,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:22,139 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:32:22,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:32:22,139 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash 75175629, now seen corresponding path program 1 times [2021-03-10 20:32:22,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:22,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87568236] [2021-03-10 20:32:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:22,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:22,147 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:22,148 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:32:22,148 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:32:22,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:32:22,149 WARN L342 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:32:22,149 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-03-10 20:32:22,153 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,153 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,154 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,154 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,154 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,154 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,154 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,155 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,155 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,155 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,155 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,155 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,156 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,156 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,156 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,156 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,157 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,158 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,159 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,159 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:22,160 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:22,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-10 20:32:22,161 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:22,161 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:22,161 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:22,161 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:22,161 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:22,162 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:22,162 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:22,162 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:22,163 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 27 transitions, 86 flow [2021-03-10 20:32:22,443 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:32:22,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:22,459 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:32:22,460 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash 101078907, now seen corresponding path program 1 times [2021-03-10 20:32:22,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:22,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680974012] [2021-03-10 20:32:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:22,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680974012] [2021-03-10 20:32:22,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:22,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:32:22,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276264644] [2021-03-10 20:32:22,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:32:22,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:22,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:32:22,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:22,504 INFO L87 Difference]: Start difference. First operand has 4407 states, 4360 states have (on average 3.963532110091743) internal successors, (17281), 4406 states have internal predecessors, (17281), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:22,724 INFO L93 Difference]: Finished difference Result 12381 states and 44365 transitions. [2021-03-10 20:32:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:32:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-10 20:32:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:22,859 INFO L225 Difference]: With dead ends: 12381 [2021-03-10 20:32:22,859 INFO L226 Difference]: Without dead ends: 12072 [2021-03-10 20:32:22,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2021-03-10 20:32:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 6974. [2021-03-10 20:32:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6933 states have (on average 3.8049906245492573) internal successors, (26380), 6973 states have internal predecessors, (26380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 26380 transitions. [2021-03-10 20:32:23,397 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 26380 transitions. Word has length 5 [2021-03-10 20:32:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:23,398 INFO L480 AbstractCegarLoop]: Abstraction has 6974 states and 26380 transitions. [2021-03-10 20:32:23,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 26380 transitions. [2021-03-10 20:32:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-10 20:32:23,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:23,401 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-10 20:32:23,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:32:23,401 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1160997765, now seen corresponding path program 1 times [2021-03-10 20:32:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:23,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449358398] [2021-03-10 20:32:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:23,410 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:23,425 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:23,426 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:32:23,426 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:32:23,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 20:32:23,426 WARN L342 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:32:23,427 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-03-10 20:32:23,436 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,437 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,438 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,439 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,440 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,442 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,443 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,445 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,445 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:23,446 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:23,446 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-03-10 20:32:23,448 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:23,448 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:23,448 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:23,448 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:23,448 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:23,448 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:23,448 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:23,448 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:23,451 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 33 transitions, 111 flow [2021-03-10 20:32:26,347 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:32:26,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:26,399 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:32:26,399 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash 132714962, now seen corresponding path program 1 times [2021-03-10 20:32:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:26,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815469254] [2021-03-10 20:32:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:32:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815469254] [2021-03-10 20:32:26,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:26,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:32:26,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409071441] [2021-03-10 20:32:26,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:32:26,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:32:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:26,480 INFO L87 Difference]: Start difference. First operand has 26439 states, 26344 states have (on average 4.771978439113271) internal successors, (125713), 26438 states have internal predecessors, (125713), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:27,619 INFO L93 Difference]: Finished difference Result 82189 states and 355977 transitions. [2021-03-10 20:32:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:32:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-10 20:32:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:28,300 INFO L225 Difference]: With dead ends: 82189 [2021-03-10 20:32:28,300 INFO L226 Difference]: Without dead ends: 81235 [2021-03-10 20:32:28,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81235 states. [2021-03-10 20:32:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81235 to 46277. [2021-03-10 20:32:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46189 states have (on average 4.551689796271839) internal successors, (210238), 46276 states have internal predecessors, (210238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 210238 transitions. [2021-03-10 20:32:31,921 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 210238 transitions. Word has length 5 [2021-03-10 20:32:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:31,921 INFO L480 AbstractCegarLoop]: Abstraction has 46277 states and 210238 transitions. [2021-03-10 20:32:31,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 210238 transitions. [2021-03-10 20:32:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-10 20:32:31,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:31,924 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-10 20:32:31,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 20:32:31,924 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:31,926 INFO L82 PathProgramCache]: Analyzing trace with hash -179995026, now seen corresponding path program 1 times [2021-03-10 20:32:31,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:31,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524258635] [2021-03-10 20:32:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:32:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:32:31,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524258635] [2021-03-10 20:32:31,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:32:31,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:32:31,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708717779] [2021-03-10 20:32:31,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:32:31,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:32:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:32:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:32:31,987 INFO L87 Difference]: Start difference. First operand 46277 states and 210238 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:32:33,261 INFO L93 Difference]: Finished difference Result 104662 states and 453119 transitions. [2021-03-10 20:32:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:32:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-10 20:32:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:32:33,781 INFO L225 Difference]: With dead ends: 104662 [2021-03-10 20:32:33,781 INFO L226 Difference]: Without dead ends: 104193 [2021-03-10 20:32:33,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:32:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104193 states. [2021-03-10 20:32:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104193 to 55726. [2021-03-10 20:32:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55726 states, 55638 states have (on average 4.55136777022898) internal successors, (253229), 55725 states have internal predecessors, (253229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55726 states to 55726 states and 253229 transitions. [2021-03-10 20:32:36,943 INFO L78 Accepts]: Start accepts. Automaton has 55726 states and 253229 transitions. Word has length 6 [2021-03-10 20:32:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:32:36,946 INFO L480 AbstractCegarLoop]: Abstraction has 55726 states and 253229 transitions. [2021-03-10 20:32:36,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:32:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 55726 states and 253229 transitions. [2021-03-10 20:32:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:32:36,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:32:36,947 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:32:36,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 20:32:36,947 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:32:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:32:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1284170360, now seen corresponding path program 1 times [2021-03-10 20:32:36,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:32:36,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245293217] [2021-03-10 20:32:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:32:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:36,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:32:36,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:32:36,954 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:32:36,954 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:32:36,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 20:32:36,955 WARN L342 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:32:36,955 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-03-10 20:32:36,960 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,960 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,960 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,961 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,961 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,961 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,961 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,961 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,963 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,964 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,965 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,966 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,967 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,967 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,968 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:32:36,969 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 20:32:36,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-03-10 20:32:36,970 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:32:36,970 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:32:36,970 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:32:36,970 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:32:36,970 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:32:36,970 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:32:36,970 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:32:36,970 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:32:36,971 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 39 transitions, 138 flow [2021-03-10 20:34:38,247 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:34:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:34:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-03-10 20:34:38,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:34:38,866 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-03-10 20:34:38,866 INFO L428 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:34:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:34:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash 170106637, now seen corresponding path program 1 times [2021-03-10 20:34:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:34:38,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054797141] [2021-03-10 20:34:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:34:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:34:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:34:38,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054797141] [2021-03-10 20:34:38,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:34:38,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:34:38,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390055968] [2021-03-10 20:34:38,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:34:38,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:34:38,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:34:38,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:34:39,244 INFO L87 Difference]: Start difference. First operand has 158631 states, 158440 states have (on average 5.594957081545064) internal successors, (886465), 158630 states have internal predecessors, (886465), 0 states have call successors, (0), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:34:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:34:45,150 INFO L93 Difference]: Finished difference Result 523661 states and 2660297 transitions. [2021-03-10 20:34:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:34:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-03-10 20:34:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:34:49,363 INFO L225 Difference]: With dead ends: 523661 [2021-03-10 20:34:49,364 INFO L226 Difference]: Without dead ends: 520766 [2021-03-10 20:34:49,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:35:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520766 states. [2021-03-10 20:35:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520766 to 297466. [2021-03-10 20:35:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297466 states, 297283 states have (on average 5.295597124625357) internal successors, (1574291), 297465 states have internal predecessors, (1574291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297466 states to 297466 states and 1574291 transitions. [2021-03-10 20:35:18,622 INFO L78 Accepts]: Start accepts. Automaton has 297466 states and 1574291 transitions. Word has length 5 [2021-03-10 20:35:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:35:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 297466 states and 1574291 transitions. [2021-03-10 20:35:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 297466 states and 1574291 transitions. [2021-03-10 20:35:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-10 20:35:18,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:35:18,623 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-10 20:35:18,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 20:35:18,623 INFO L428 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:35:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:35:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 978536248, now seen corresponding path program 1 times [2021-03-10 20:35:18,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:35:18,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601926516] [2021-03-10 20:35:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:35:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:35:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:35:18,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601926516] [2021-03-10 20:35:18,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:35:18,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:35:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945536981] [2021-03-10 20:35:18,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:35:18,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:35:18,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:35:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:35:18,656 INFO L87 Difference]: Start difference. First operand 297466 states and 1574291 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:35:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:35:27,270 INFO L93 Difference]: Finished difference Result 675048 states and 3430058 transitions. [2021-03-10 20:35:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:35:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-10 20:35:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:35:31,713 INFO L225 Difference]: With dead ends: 675048 [2021-03-10 20:35:31,714 INFO L226 Difference]: Without dead ends: 673610 [2021-03-10 20:35:31,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:35:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673610 states. [2021-03-10 20:36:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673610 to 359773. [2021-03-10 20:36:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359773 states, 359590 states have (on average 5.301006702077366) internal successors, (1906189), 359772 states have internal predecessors, (1906189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:36:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359773 states to 359773 states and 1906189 transitions. [2021-03-10 20:36:13,185 INFO L78 Accepts]: Start accepts. Automaton has 359773 states and 1906189 transitions. Word has length 6 [2021-03-10 20:36:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:36:13,185 INFO L480 AbstractCegarLoop]: Abstraction has 359773 states and 1906189 transitions. [2021-03-10 20:36:13,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:36:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 359773 states and 1906189 transitions. [2021-03-10 20:36:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-10 20:36:13,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:36:13,186 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:36:13,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 20:36:13,187 INFO L428 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:36:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:36:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash 270378104, now seen corresponding path program 1 times [2021-03-10 20:36:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:36:13,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928923347] [2021-03-10 20:36:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:36:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:36:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 20:36:13,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928923347] [2021-03-10 20:36:13,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:36:13,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:36:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283530942] [2021-03-10 20:36:13,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:36:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:36:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:36:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:36:13,230 INFO L87 Difference]: Start difference. First operand 359773 states and 1906189 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-03-10 20:36:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:36:24,437 INFO L93 Difference]: Finished difference Result 825165 states and 4206398 transitions. [2021-03-10 20:36:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:36:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2021-03-10 20:36:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:36:33,767 INFO L225 Difference]: With dead ends: 825165 [2021-03-10 20:36:33,768 INFO L226 Difference]: Without dead ends: 823264 [2021-03-10 20:36:33,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:36:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823264 states. [2021-03-10 20:37:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823264 to 437066. [2021-03-10 20:37:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437066 states, 436883 states have (on average 5.306926568440521) internal successors, (2318506), 437065 states have internal predecessors, (2318506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:37:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437066 states to 437066 states and 2318506 transitions. [2021-03-10 20:37:16,796 INFO L78 Accepts]: Start accepts. Automaton has 437066 states and 2318506 transitions. Word has length 7 [2021-03-10 20:37:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:37:16,796 INFO L480 AbstractCegarLoop]: Abstraction has 437066 states and 2318506 transitions. [2021-03-10 20:37:16,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2021-03-10 20:37:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 437066 states and 2318506 transitions. [2021-03-10 20:37:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:37:16,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:37:16,799 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:37:16,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 20:37:16,800 INFO L428 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:37:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:37:16,802 INFO L82 PathProgramCache]: Analyzing trace with hash -414268605, now seen corresponding path program 1 times [2021-03-10 20:37:16,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:37:16,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617037423] [2021-03-10 20:37:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:37:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:37:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:37:16,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617037423] [2021-03-10 20:37:16,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:37:16,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:37:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167972282] [2021-03-10 20:37:16,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:37:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:37:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:37:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:37:16,911 INFO L87 Difference]: Start difference. First operand 437066 states and 2318506 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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)