/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-divine/condvar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 19:26:56,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 19:26:56,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 19:26:56,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 19:26:56,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 19:26:56,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 19:26:56,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 19:26:56,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 19:26:56,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 19:26:56,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 19:26:56,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 19:26:56,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 19:26:56,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 19:26:56,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 19:26:56,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 19:26:56,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 19:26:56,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 19:26:56,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 19:26:56,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 19:26:56,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 19:26:56,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 19:26:56,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 19:26:56,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 19:26:56,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 19:26:56,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 19:26:56,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 19:26:56,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 19:26:56,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 19:26:56,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 19:26:56,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 19:26:56,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 19:26:56,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 19:26:56,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 19:26:56,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 19:26:56,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 19:26:56,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 19:26:56,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 19:26:56,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 19:26:56,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 19:26:56,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 19:26:56,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 19:26:56,585 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 19:26:56,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 19:26:56,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 19:26:56,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 19:26:56,587 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 19:26:56,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 19:26:56,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 19:26:56,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 19:26:56,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 19:26:56,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 19:26:56,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 19:26:56,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 19:26:56,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 19:26:56,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 19:26:56,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 19:26:56,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 19:26:56,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 19:26:56,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 19:26:56,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 19:26:56,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 19:26:56,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 19:26:56,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 19:26:56,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 19:26:56,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 19:26:56,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 19:26:56,902 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 19:26:56,903 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/condvar.i [2020-10-11 19:26:56,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30df00d66/968434d5c40b478e9da02f95d747be76/FLAG539613d11 [2020-10-11 19:26:57,574 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 19:26:57,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/condvar.i [2020-10-11 19:26:57,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30df00d66/968434d5c40b478e9da02f95d747be76/FLAG539613d11 [2020-10-11 19:26:57,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30df00d66/968434d5c40b478e9da02f95d747be76 [2020-10-11 19:26:57,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 19:26:57,845 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 19:26:57,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 19:26:57,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 19:26:57,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 19:26:57,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:26:57" (1/1) ... [2020-10-11 19:26:57,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137570a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:57, skipping insertion in model container [2020-10-11 19:26:57,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:26:57" (1/1) ... [2020-10-11 19:26:57,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 19:26:57,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 19:26:58,078 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-11 19:26:58,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:26:58,401 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 19:26:58,428 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-11 19:26:58,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:26:58,548 INFO L208 MainTranslator]: Completed translation [2020-10-11 19:26:58,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58 WrapperNode [2020-10-11 19:26:58,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 19:26:58,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 19:26:58,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 19:26:58,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 19:26:58,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 19:26:58,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 19:26:58,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 19:26:58,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 19:26:58,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (1/1) ... [2020-10-11 19:26:58,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 19:26:58,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 19:26:58,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 19:26:58,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 19:26:58,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (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 [2020-10-11 19:26:58,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 19:26:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 19:26:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-11 19:26:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 19:26:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 19:26:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-11 19:26:58,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-11 19:26:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-11 19:26:58,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 19:26:58,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 19:26:58,704 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 19:26:59,061 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 19:26:59,062 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 19:26:59,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:26:59 BoogieIcfgContainer [2020-10-11 19:26:59,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 19:26:59,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 19:26:59,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 19:26:59,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 19:26:59,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:26:57" (1/3) ... [2020-10-11 19:26:59,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7823593d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:26:59, skipping insertion in model container [2020-10-11 19:26:59,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:26:58" (2/3) ... [2020-10-11 19:26:59,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7823593d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:26:59, skipping insertion in model container [2020-10-11 19:26:59,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:26:59" (3/3) ... [2020-10-11 19:26:59,073 INFO L111 eAbstractionObserver]: Analyzing ICFG condvar.i [2020-10-11 19:26:59,083 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 19:26:59,091 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 19:26:59,092 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 19:26:59,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,117 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,117 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,118 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,118 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,119 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,120 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,120 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,120 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,124 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,124 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,124 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,125 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,125 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,125 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:26:59,153 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 19:26:59,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 19:26:59,172 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 19:26:59,172 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 19:26:59,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 19:26:59,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 19:26:59,172 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 19:26:59,172 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 19:26:59,173 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 19:26:59,185 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2020-10-11 19:26:59,225 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-10-11 19:26:59,226 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:26:59,231 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-10-11 19:26:59,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2020-10-11 19:26:59,238 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 52 transitions, 107 flow [2020-10-11 19:26:59,255 INFO L129 PetriNetUnfolder]: 5/49 cut-off events. [2020-10-11 19:26:59,255 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:26:59,255 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:26:59,257 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:26:59,257 INFO L429 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:26:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:26:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1820809621, now seen corresponding path program 1 times [2020-10-11 19:26:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:26:59,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809420614] [2020-10-11 19:26:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:26:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:26:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:26:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809420614] [2020-10-11 19:26:59,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:26:59,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 19:26:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332460415] [2020-10-11 19:26:59,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 19:26:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:26:59,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 19:26:59,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 19:26:59,516 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 59 [2020-10-11 19:26:59,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 107 flow. Second operand 2 states. [2020-10-11 19:26:59,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:26:59,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 59 [2020-10-11 19:26:59,521 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:26:59,549 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2020-10-11 19:26:59,550 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:26:59,551 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 49 events. 2/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 49 event pairs, 0 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2020-10-11 19:26:59,555 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 0 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2020-10-11 19:26:59,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 101 flow [2020-10-11 19:26:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 19:26:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 19:26:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 115 transitions. [2020-10-11 19:26:59,575 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9745762711864406 [2020-10-11 19:26:59,576 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 115 transitions. [2020-10-11 19:26:59,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 115 transitions. [2020-10-11 19:26:59,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:26:59,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 115 transitions. [2020-10-11 19:26:59,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 19:26:59,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 19:26:59,590 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 19:26:59,593 INFO L185 Difference]: Start difference. First operand has 51 places, 52 transitions, 107 flow. Second operand 2 states and 115 transitions. [2020-10-11 19:26:59,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 101 flow [2020-10-11 19:26:59,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:26:59,604 INFO L241 Difference]: Finished difference. Result has 51 places, 49 transitions, 100 flow [2020-10-11 19:26:59,607 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2020-10-11 19:26:59,609 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2020-10-11 19:26:59,609 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 100 flow [2020-10-11 19:26:59,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 19:26:59,609 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:26:59,610 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:26:59,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 19:26:59,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:26:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:26:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1820808660, now seen corresponding path program 1 times [2020-10-11 19:26:59,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:26:59,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201799272] [2020-10-11 19:26:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:26:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:26:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:26:59,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201799272] [2020-10-11 19:26:59,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:26:59,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:26:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568983235] [2020-10-11 19:26:59,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:26:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:26:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:26:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:26:59,842 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2020-10-11 19:26:59,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 100 flow. Second operand 3 states. [2020-10-11 19:26:59,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:26:59,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2020-10-11 19:26:59,843 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:26:59,875 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2020-10-11 19:26:59,875 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:26:59,877 INFO L80 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 49 events. 2/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2020-10-11 19:26:59,877 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 1 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2020-10-11 19:26:59,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 106 flow [2020-10-11 19:26:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:26:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:26:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2020-10-11 19:26:59,890 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9209039548022598 [2020-10-11 19:26:59,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 163 transitions. [2020-10-11 19:26:59,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 163 transitions. [2020-10-11 19:26:59,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:26:59,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 163 transitions. [2020-10-11 19:26:59,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:26:59,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:26:59,898 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:26:59,898 INFO L185 Difference]: Start difference. First operand has 51 places, 49 transitions, 100 flow. Second operand 3 states and 163 transitions. [2020-10-11 19:26:59,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 106 flow [2020-10-11 19:26:59,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 19:26:59,908 INFO L241 Difference]: Finished difference. Result has 54 places, 45 transitions, 100 flow [2020-10-11 19:26:59,908 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2020-10-11 19:26:59,909 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2020-10-11 19:26:59,909 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 100 flow [2020-10-11 19:26:59,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:26:59,910 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:26:59,910 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:26:59,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 19:26:59,911 INFO L429 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:26:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:26:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash -574225388, now seen corresponding path program 1 times [2020-10-11 19:26:59,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:26:59,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173886054] [2020-10-11 19:26:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:26:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:26:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:26:59,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173886054] [2020-10-11 19:26:59,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:26:59,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:26:59,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121008162] [2020-10-11 19:26:59,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:26:59,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:26:59,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:26:59,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:27:00,016 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 59 [2020-10-11 19:27:00,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 100 flow. Second operand 3 states. [2020-10-11 19:27:00,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:27:00,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 59 [2020-10-11 19:27:00,017 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:27:00,033 INFO L129 PetriNetUnfolder]: 2/49 cut-off events. [2020-10-11 19:27:00,033 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:27:00,034 INFO L80 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 49 events. 2/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 1/50 useless extension candidates. Maximal degree in co-relation 60. Up to 5 conditions per place. [2020-10-11 19:27:00,034 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2020-10-11 19:27:00,035 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 112 flow [2020-10-11 19:27:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:27:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:27:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2020-10-11 19:27:00,038 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2020-10-11 19:27:00,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2020-10-11 19:27:00,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2020-10-11 19:27:00,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:27:00,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2020-10-11 19:27:00,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:27:00,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:27:00,041 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:27:00,042 INFO L185 Difference]: Start difference. First operand has 54 places, 45 transitions, 100 flow. Second operand 3 states and 162 transitions. [2020-10-11 19:27:00,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 112 flow [2020-10-11 19:27:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 19:27:00,044 INFO L241 Difference]: Finished difference. Result has 51 places, 46 transitions, 108 flow [2020-10-11 19:27:00,045 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2020-10-11 19:27:00,045 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2020-10-11 19:27:00,045 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 108 flow [2020-10-11 19:27:00,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:27:00,046 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:27:00,046 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:27:00,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 19:27:00,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:27:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:27:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash 557806982, now seen corresponding path program 1 times [2020-10-11 19:27:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:27:00,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298799130] [2020-10-11 19:27:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:27:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:27:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:27:00,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298799130] [2020-10-11 19:27:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977975565] [2020-10-11 19:27:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:27:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:27:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:27:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:27:00,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:27:00,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:27:00,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217116309] [2020-10-11 19:27:00,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:27:00,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:27:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:27:00,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:27:00,474 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 59 [2020-10-11 19:27:00,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 108 flow. Second operand 7 states. [2020-10-11 19:27:00,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:27:00,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 59 [2020-10-11 19:27:00,475 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:27:00,528 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2020-10-11 19:27:00,528 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-11 19:27:00,529 INFO L80 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 54 events. 2/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 75. Up to 7 conditions per place. [2020-10-11 19:27:00,530 INFO L132 encePairwiseOnDemand]: 54/59 looper letters, 6 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2020-10-11 19:27:00,530 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 140 flow [2020-10-11 19:27:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:27:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:27:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 312 transitions. [2020-10-11 19:27:00,533 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8813559322033898 [2020-10-11 19:27:00,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 312 transitions. [2020-10-11 19:27:00,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 312 transitions. [2020-10-11 19:27:00,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:27:00,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 312 transitions. [2020-10-11 19:27:00,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:27:00,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:27:00,537 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:27:00,538 INFO L185 Difference]: Start difference. First operand has 51 places, 46 transitions, 108 flow. Second operand 6 states and 312 transitions. [2020-10-11 19:27:00,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 140 flow [2020-10-11 19:27:00,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:27:00,541 INFO L241 Difference]: Finished difference. Result has 58 places, 49 transitions, 138 flow [2020-10-11 19:27:00,541 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2020-10-11 19:27:00,541 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2020-10-11 19:27:00,541 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 138 flow [2020-10-11 19:27:00,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:27:00,542 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:27:00,542 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:27:00,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:00,756 INFO L429 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:27:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:27:00,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1285720324, now seen corresponding path program 2 times [2020-10-11 19:27:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:27:00,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496678829] [2020-10-11 19:27:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:27:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:27:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:27:00,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496678829] [2020-10-11 19:27:00,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833950894] [2020-10-11 19:27:00,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:00,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:27:00,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:27:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:27:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:27:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:27:00,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:27:00,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-11 19:27:00,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508612369] [2020-10-11 19:27:00,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 19:27:00,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:27:00,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 19:27:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 19:27:01,080 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 59 [2020-10-11 19:27:01,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 138 flow. Second operand 9 states. [2020-10-11 19:27:01,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:27:01,081 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 59 [2020-10-11 19:27:01,081 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:27:01,168 INFO L129 PetriNetUnfolder]: 2/59 cut-off events. [2020-10-11 19:27:01,168 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-11 19:27:01,169 INFO L80 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 59 events. 2/59 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 99. Up to 7 conditions per place. [2020-10-11 19:27:01,170 INFO L132 encePairwiseOnDemand]: 54/59 looper letters, 6 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2020-10-11 19:27:01,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 53 transitions, 184 flow [2020-10-11 19:27:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 19:27:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 19:27:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 465 transitions. [2020-10-11 19:27:01,173 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8757062146892656 [2020-10-11 19:27:01,174 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 465 transitions. [2020-10-11 19:27:01,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 465 transitions. [2020-10-11 19:27:01,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:27:01,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 465 transitions. [2020-10-11 19:27:01,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 19:27:01,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 19:27:01,179 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 19:27:01,179 INFO L185 Difference]: Start difference. First operand has 58 places, 49 transitions, 138 flow. Second operand 9 states and 465 transitions. [2020-10-11 19:27:01,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 53 transitions, 184 flow [2020-10-11 19:27:01,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 178 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-11 19:27:01,183 INFO L241 Difference]: Finished difference. Result has 67 places, 52 transitions, 176 flow [2020-10-11 19:27:01,183 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2020-10-11 19:27:01,183 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2020-10-11 19:27:01,184 INFO L481 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 176 flow [2020-10-11 19:27:01,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 19:27:01,184 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:27:01,184 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:27:01,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:01,398 INFO L429 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 19:27:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:27:01,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2049627788, now seen corresponding path program 3 times [2020-10-11 19:27:01,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:27:01,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102501624] [2020-10-11 19:27:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:27:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:27:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:27:01,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102501624] [2020-10-11 19:27:01,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514092969] [2020-10-11 19:27:01,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:01,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 19:27:01,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:27:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 19:27:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:27:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-11 19:27:01,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 19:27:01,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2020-10-11 19:27:01,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554158281] [2020-10-11 19:27:01,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:27:01,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:27:01,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:27:01,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 19:27:01,694 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 59 [2020-10-11 19:27:01,694 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 176 flow. Second operand 7 states. [2020-10-11 19:27:01,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:27:01,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 59 [2020-10-11 19:27:01,695 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:27:01,810 INFO L129 PetriNetUnfolder]: 2/57 cut-off events. [2020-10-11 19:27:01,810 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2020-10-11 19:27:01,811 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 57 events. 2/57 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 119. Up to 5 conditions per place. [2020-10-11 19:27:01,811 INFO L132 encePairwiseOnDemand]: 51/59 looper letters, 0 selfloop transitions, 0 changer transitions 52/52 dead transitions. [2020-10-11 19:27:01,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 52 transitions, 212 flow [2020-10-11 19:27:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 19:27:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 19:27:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 417 transitions. [2020-10-11 19:27:01,814 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7853107344632768 [2020-10-11 19:27:01,814 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 417 transitions. [2020-10-11 19:27:01,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 417 transitions. [2020-10-11 19:27:01,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:27:01,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 417 transitions. [2020-10-11 19:27:01,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 19:27:01,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 19:27:01,817 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 19:27:01,817 INFO L185 Difference]: Start difference. First operand has 67 places, 52 transitions, 176 flow. Second operand 9 states and 417 transitions. [2020-10-11 19:27:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 52 transitions, 212 flow [2020-10-11 19:27:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 52 transitions, 194 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-11 19:27:01,820 INFO L241 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2020-10-11 19:27:01,821 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2020-10-11 19:27:01,821 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2020-10-11 19:27:01,821 INFO L481 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2020-10-11 19:27:01,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:27:02,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:27:02,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:27:02 BasicIcfg [2020-10-11 19:27:02,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 19:27:02,045 INFO L168 Benchmark]: Toolchain (without parser) took 4200.47 ms. Allocated memory was 249.6 MB in the beginning and 370.7 MB in the end (delta: 121.1 MB). Free memory was 204.7 MB in the beginning and 331.9 MB in the end (delta: -127.3 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:27:02,046 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 249.6 MB. Free memory was 227.6 MB in the beginning and 226.8 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. [2020-10-11 19:27:02,046 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.39 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 265.2 MB in the end (delta: -60.5 MB). Peak memory consumption was 27.8 MB. Max. memory is 14.2 GB. [2020-10-11 19:27:02,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 309.3 MB. Free memory was 265.2 MB in the beginning and 262.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:27:02,048 INFO L168 Benchmark]: Boogie Preprocessor took 28.89 ms. Allocated memory is still 309.3 MB. Free memory was 262.6 MB in the beginning and 261.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-11 19:27:02,049 INFO L168 Benchmark]: RCFGBuilder took 436.37 ms. Allocated memory is still 309.3 MB. Free memory was 261.0 MB in the beginning and 239.9 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. [2020-10-11 19:27:02,050 INFO L168 Benchmark]: TraceAbstraction took 2977.21 ms. Allocated memory was 309.3 MB in the beginning and 370.7 MB in the end (delta: 61.3 MB). Free memory was 239.0 MB in the beginning and 331.9 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:27:02,054 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 249.6 MB. Free memory was 227.6 MB in the beginning and 226.8 MB in the end (delta: 839.2 kB). Peak memory consumption was 839.2 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 703.39 ms. Allocated memory was 249.6 MB in the beginning and 309.3 MB in the end (delta: 59.8 MB). Free memory was 204.7 MB in the beginning and 265.2 MB in the end (delta: -60.5 MB). Peak memory consumption was 27.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 309.3 MB. Free memory was 265.2 MB in the beginning and 262.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.89 ms. Allocated memory is still 309.3 MB. Free memory was 262.6 MB in the beginning and 261.8 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * RCFGBuilder took 436.37 ms. Allocated memory is still 309.3 MB. Free memory was 261.0 MB in the beginning and 239.9 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2977.21 ms. Allocated memory was 309.3 MB in the beginning and 370.7 MB in the end (delta: 61.3 MB). Free memory was 239.0 MB in the beginning and 331.9 MB in the end (delta: -92.9 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 695]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 54 SDslu, 28 SDs, 0 SdLazy, 147 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 367 NumberOfCodeBlocks, 362 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 358 ConstructedInterpolants, 0 QuantifiedInterpolants, 22072 SizeOfPredicates, 12 NumberOfNonLiveVariables, 310 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 18/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...