/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-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-18 22:05:59,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 22:05:59,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 22:05:59,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 22:05:59,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 22:05:59,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 22:05:59,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 22:05:59,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 22:05:59,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 22:05:59,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 22:05:59,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 22:05:59,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 22:05:59,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 22:05:59,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 22:05:59,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 22:05:59,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 22:05:59,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 22:05:59,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 22:05:59,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 22:05:59,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 22:05:59,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 22:05:59,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 22:05:59,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 22:05:59,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 22:05:59,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 22:05:59,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 22:05:59,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 22:05:59,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 22:05:59,700 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-PN-NoLbe.epf [2022-01-18 22:05:59,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 22:05:59,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 22:05:59,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 22:05:59,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 22:05:59,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 22:05:59,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 22:05:59,727 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 22:05:59,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 22:05:59,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 22:05:59,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 22:05:59,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 22:05:59,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 22:05:59,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 22:05:59,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 22:05:59,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 22:05:59,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 22:05:59,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 22:05:59,731 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 22:05:59,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-18 22:05:59,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 22:05:59,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 22:05:59,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 22:05:59,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 22:05:59,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-18 22:05:59,971 INFO L275 PluginConnector]: CDTParser initialized [2022-01-18 22:05:59,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-01-18 22:06:00,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ecce180/9cdeb9d6edec48178c144a00b964c5cb/FLAGd56bb62b4 [2022-01-18 22:06:00,481 INFO L306 CDTParser]: Found 1 translation units. [2022-01-18 22:06:00,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-01-18 22:06:00,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ecce180/9cdeb9d6edec48178c144a00b964c5cb/FLAGd56bb62b4 [2022-01-18 22:06:00,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2ecce180/9cdeb9d6edec48178c144a00b964c5cb [2022-01-18 22:06:00,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 22:06:00,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-18 22:06:00,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-18 22:06:00,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-18 22:06:00,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-18 22:06:00,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.01 10:06:00" (1/1) ... [2022-01-18 22:06:00,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@400dca6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:00, skipping insertion in model container [2022-01-18 22:06:00,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.01 10:06:00" (1/1) ... [2022-01-18 22:06:00,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-18 22:06:00,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-18 22:06:01,159 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2022-01-18 22:06:01,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-18 22:06:01,169 INFO L203 MainTranslator]: Completed pre-run [2022-01-18 22:06:01,213 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2022-01-18 22:06:01,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-18 22:06:01,242 INFO L208 MainTranslator]: Completed translation [2022-01-18 22:06:01,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01 WrapperNode [2022-01-18 22:06:01,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-18 22:06:01,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 22:06:01,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 22:06:01,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 22:06:01,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,294 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-18 22:06:01,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 22:06:01,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 22:06:01,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 22:06:01,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 22:06:01,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 22:06:01,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 22:06:01,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 22:06:01,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 22:06:01,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (1/1) ... [2022-01-18 22:06:01,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 22:06:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:01,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 22:06:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 22:06:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-01-18 22:06:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-01-18 22:06:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-01-18 22:06:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-18 22:06:01,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 22:06:01,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 22:06:01,402 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 22:06:01,485 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 22:06:01,486 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 22:06:01,590 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 22:06:01,595 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 22:06:01,595 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 22:06:01,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 10:06:01 BoogieIcfgContainer [2022-01-18 22:06:01,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 22:06:01,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 22:06:01,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 22:06:01,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 22:06:01,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.01 10:06:00" (1/3) ... [2022-01-18 22:06:01,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26851d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 10:06:01, skipping insertion in model container [2022-01-18 22:06:01,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:06:01" (2/3) ... [2022-01-18 22:06:01,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26851d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 10:06:01, skipping insertion in model container [2022-01-18 22:06:01,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 10:06:01" (3/3) ... [2022-01-18 22:06:01,619 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2022-01-18 22:06:01,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 22:06:01,623 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 22:06:01,623 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 22:06:01,664 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,664 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,665 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,666 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,666 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,666 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,666 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,667 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,667 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,667 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,667 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,668 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,668 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,669 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,669 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,669 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,669 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,669 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,670 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,671 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,672 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,672 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,672 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,673 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,673 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,673 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,673 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,674 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,674 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,674 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,674 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,674 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,675 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,675 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,675 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,675 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,675 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,676 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,676 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,678 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,678 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,679 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,679 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,679 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,679 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,681 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,681 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,681 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,681 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,682 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,682 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:06:01,682 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 22:06:01,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 22:06:01,741 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 22:06:01,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 22:06:01,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-01-18 22:06:01,780 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-18 22:06:01,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-18 22:06:01,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-01-18 22:06:01,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-01-18 22:06:01,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-01-18 22:06:01,804 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-01-18 22:06:01,805 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-18 22:06:01,805 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:01,806 INFO L254 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] [2022-01-18 22:06:01,806 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-01-18 22:06:01,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:01,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545945979] [2022-01-18 22:06:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:01,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:02,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545945979] [2022-01-18 22:06:02,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545945979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:02,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:02,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:06:02,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081908892] [2022-01-18 22:06:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:02,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:06:02,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:06:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:06:02,303 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:02,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:02,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:02,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:02,515 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2022-01-18 22:06:02,515 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-18 22:06:02,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2022-01-18 22:06:02,521 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-01-18 22:06:02,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-01-18 22:06:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 22:06:02,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-18 22:06:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-01-18 22:06:02,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-01-18 22:06:02,539 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-01-18 22:06:02,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-01-18 22:06:02,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:02,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-01-18 22:06:02,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,584 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,585 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-01-18 22:06:02,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-01-18 22:06:02,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-18 22:06:02,607 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-01-18 22:06:02,608 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-01-18 22:06:02,611 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-01-18 22:06:02,612 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-01-18 22:06:02,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:02,612 INFO L254 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] [2022-01-18 22:06:02,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 22:06:02,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-01-18 22:06:02,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:02,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151261991] [2022-01-18 22:06:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:02,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151261991] [2022-01-18 22:06:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151261991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:02,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:06:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140782871] [2022-01-18 22:06:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:02,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:06:02,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:06:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:06:02,782 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:02,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:02,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:02,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:02,923 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2022-01-18 22:06:02,923 INFO L130 PetriNetUnfolder]: For 111/114 co-relation queries the response was YES. [2022-01-18 22:06:02,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 848 event pairs, 0 based on Foata normal form. 3/205 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2022-01-18 22:06:02,925 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-01-18 22:06:02,925 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-01-18 22:06:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 22:06:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-18 22:06:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-01-18 22:06:02,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-01-18 22:06:02,927 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-01-18 22:06:02,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-01-18 22:06:02,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:02,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-01-18 22:06:02,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,930 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,930 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-01-18 22:06:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-01-18 22:06:02,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-18 22:06:02,935 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-01-18 22:06:02,935 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-01-18 22:06:02,936 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-18 22:06:02,936 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-01-18 22:06:02,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:02,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:02,937 INFO L254 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] [2022-01-18 22:06:02,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 22:06:02,937 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-01-18 22:06:02,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:02,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117801722] [2022-01-18 22:06:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:02,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:03,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:03,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117801722] [2022-01-18 22:06:03,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117801722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:03,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:03,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:06:03,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232006990] [2022-01-18 22:06:03,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:03,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:06:03,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:06:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:06:03,015 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:03,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:03,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:03,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:03,086 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2022-01-18 22:06:03,086 INFO L130 PetriNetUnfolder]: For 251/258 co-relation queries the response was YES. [2022-01-18 22:06:03,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 251/258 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 602 event pairs, 0 based on Foata normal form. 10/180 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2022-01-18 22:06:03,088 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-01-18 22:06:03,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-01-18 22:06:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 22:06:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-18 22:06:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-01-18 22:06:03,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-01-18 22:06:03,090 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-01-18 22:06:03,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-01-18 22:06:03,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:03,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-01-18 22:06:03,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,094 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,094 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-01-18 22:06:03,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-01-18 22:06:03,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-01-18 22:06:03,098 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-01-18 22:06:03,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-01-18 22:06:03,099 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-01-18 22:06:03,099 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-01-18 22:06:03,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:03,100 INFO L254 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] [2022-01-18 22:06:03,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 22:06:03,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-01-18 22:06:03,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029862133] [2022-01-18 22:06:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:03,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:03,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:03,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029862133] [2022-01-18 22:06:03,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029862133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:03,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:03,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:06:03,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555114574] [2022-01-18 22:06:03,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:03,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:06:03,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:06:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:06:03,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:03,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:03,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:03,178 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:03,268 INFO L129 PetriNetUnfolder]: 30/177 cut-off events. [2022-01-18 22:06:03,268 INFO L130 PetriNetUnfolder]: For 232/248 co-relation queries the response was YES. [2022-01-18 22:06:03,269 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 177 events. 30/177 cut-off events. For 232/248 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 550 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 365. Up to 32 conditions per place. [2022-01-18 22:06:03,270 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-01-18 22:06:03,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-01-18 22:06:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 22:06:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-18 22:06:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-01-18 22:06:03,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-01-18 22:06:03,272 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-01-18 22:06:03,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-01-18 22:06:03,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:03,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-01-18 22:06:03,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,276 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,276 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-01-18 22:06:03,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-01-18 22:06:03,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-01-18 22:06:03,283 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-01-18 22:06:03,283 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-01-18 22:06:03,285 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-01-18 22:06:03,285 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-01-18 22:06:03,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:03,285 INFO L254 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, 1, 1, 1] [2022-01-18 22:06:03,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 22:06:03,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1734522485, now seen corresponding path program 1 times [2022-01-18 22:06:03,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080875102] [2022-01-18 22:06:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:03,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:03,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:03,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080875102] [2022-01-18 22:06:03,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080875102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:03,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:03,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-18 22:06:03,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782252628] [2022-01-18 22:06:03,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:03,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 22:06:03,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 22:06:03,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 22:06:03,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:03,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:03,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:03,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:03,569 INFO L129 PetriNetUnfolder]: 32/173 cut-off events. [2022-01-18 22:06:03,569 INFO L130 PetriNetUnfolder]: For 432/450 co-relation queries the response was YES. [2022-01-18 22:06:03,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 173 events. 32/173 cut-off events. For 432/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 1 based on Foata normal form. 15/173 useless extension candidates. Maximal degree in co-relation 404. Up to 36 conditions per place. [2022-01-18 22:06:03,571 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 19 changer transitions 8/91 dead transitions. [2022-01-18 22:06:03,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 584 flow [2022-01-18 22:06:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 22:06:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-18 22:06:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-01-18 22:06:03,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-18 22:06:03,574 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-01-18 22:06:03,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-01-18 22:06:03,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:03,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-01-18 22:06:03,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,578 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,578 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 638 transitions. [2022-01-18 22:06:03,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 584 flow [2022-01-18 22:06:03,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 498 flow, removed 30 selfloop flow, removed 10 redundant places. [2022-01-18 22:06:03,583 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 390 flow [2022-01-18 22:06:03,583 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2022-01-18 22:06:03,585 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-18 22:06:03,585 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 390 flow [2022-01-18 22:06:03,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,586 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:03,586 INFO L254 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, 1, 1, 1] [2022-01-18 22:06:03,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 22:06:03,586 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 2 times [2022-01-18 22:06:03,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:03,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813496891] [2022-01-18 22:06:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:03,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:03,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813496891] [2022-01-18 22:06:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813496891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:03,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:06:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-18 22:06:03,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184403171] [2022-01-18 22:06:03,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 22:06:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:03,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 22:06:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 22:06:03,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:03,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:03,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:03,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:03,838 INFO L129 PetriNetUnfolder]: 33/189 cut-off events. [2022-01-18 22:06:03,838 INFO L130 PetriNetUnfolder]: For 497/515 co-relation queries the response was YES. [2022-01-18 22:06:03,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 189 events. 33/189 cut-off events. For 497/515 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 665 event pairs, 0 based on Foata normal form. 16/188 useless extension candidates. Maximal degree in co-relation 473. Up to 38 conditions per place. [2022-01-18 22:06:03,840 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 22 selfloop transitions, 17 changer transitions 5/89 dead transitions. [2022-01-18 22:06:03,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 604 flow [2022-01-18 22:06:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 22:06:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-01-18 22:06:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-01-18 22:06:03,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-01-18 22:06:03,843 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-01-18 22:06:03,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-01-18 22:06:03,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:03,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-01-18 22:06:03,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,848 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,848 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 390 flow. Second operand 12 states and 695 transitions. [2022-01-18 22:06:03,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 604 flow [2022-01-18 22:06:03,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 563 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-01-18 22:06:03,855 INFO L242 Difference]: Finished difference. Result has 102 places, 80 transitions, 442 flow [2022-01-18 22:06:03,855 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=102, PETRI_TRANSITIONS=80} [2022-01-18 22:06:03,857 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2022-01-18 22:06:03,857 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 80 transitions, 442 flow [2022-01-18 22:06:03,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:03,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:03,859 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:03,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 22:06:03,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1110018853, now seen corresponding path program 1 times [2022-01-18 22:06:03,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:03,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649879633] [2022-01-18 22:06:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:03,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:03,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:03,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649879633] [2022-01-18 22:06:03,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649879633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:03,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494656493] [2022-01-18 22:06:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:03,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:03,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:03,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 22:06:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 22:06:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:04,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:04,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494656493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:04,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:04,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 22:06:04,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260278741] [2022-01-18 22:06:04,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:04,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 22:06:04,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:04,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 22:06:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 22:06:04,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:04,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 80 transitions, 442 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:04,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:04,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:04,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:04,784 INFO L129 PetriNetUnfolder]: 51/288 cut-off events. [2022-01-18 22:06:04,784 INFO L130 PetriNetUnfolder]: For 900/931 co-relation queries the response was YES. [2022-01-18 22:06:04,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 288 events. 51/288 cut-off events. For 900/931 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1073 event pairs, 1 based on Foata normal form. 19/279 useless extension candidates. Maximal degree in co-relation 752. Up to 60 conditions per place. [2022-01-18 22:06:04,787 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 26 selfloop transitions, 34 changer transitions 14/119 dead transitions. [2022-01-18 22:06:04,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 1052 flow [2022-01-18 22:06:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 22:06:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-18 22:06:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-01-18 22:06:04,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-01-18 22:06:04,790 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-01-18 22:06:04,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-01-18 22:06:04,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:04,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-01-18 22:06:04,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:04,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:04,795 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:04,795 INFO L186 Difference]: Start difference. First operand has 102 places, 80 transitions, 442 flow. Second operand 20 states and 1159 transitions. [2022-01-18 22:06:04,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 1052 flow [2022-01-18 22:06:04,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 119 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-01-18 22:06:04,801 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 736 flow [2022-01-18 22:06:04,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=736, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2022-01-18 22:06:04,802 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2022-01-18 22:06:04,802 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 736 flow [2022-01-18 22:06:04,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:04,803 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:04,803 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:04,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:05,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:05,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 936563082, now seen corresponding path program 1 times [2022-01-18 22:06:05,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163097513] [2022-01-18 22:06:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:05,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:05,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163097513] [2022-01-18 22:06:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163097513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001798208] [2022-01-18 22:06:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:05,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:05,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:05,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:05,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 22:06:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:06:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:05,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:05,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001798208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:05,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:05,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 22:06:05,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731832314] [2022-01-18 22:06:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 22:06:05,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 22:06:05,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 22:06:05,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:05,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 736 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:05,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:05,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:05,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:06,030 INFO L129 PetriNetUnfolder]: 73/413 cut-off events. [2022-01-18 22:06:06,030 INFO L130 PetriNetUnfolder]: For 2658/2717 co-relation queries the response was YES. [2022-01-18 22:06:06,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 413 events. 73/413 cut-off events. For 2658/2717 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1616 event pairs, 0 based on Foata normal form. 23/395 useless extension candidates. Maximal degree in co-relation 1341. Up to 96 conditions per place. [2022-01-18 22:06:06,036 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 55 selfloop transitions, 25 changer transitions 26/151 dead transitions. [2022-01-18 22:06:06,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1856 flow [2022-01-18 22:06:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 22:06:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-18 22:06:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-01-18 22:06:06,040 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-18 22:06:06,040 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-01-18 22:06:06,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-01-18 22:06:06,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:06,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-01-18 22:06:06,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:06,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:06,051 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:06,051 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 736 flow. Second operand 25 states and 1450 transitions. [2022-01-18 22:06:06,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1856 flow [2022-01-18 22:06:06,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1453 flow, removed 180 selfloop flow, removed 13 redundant places. [2022-01-18 22:06:06,066 INFO L242 Difference]: Finished difference. Result has 147 places, 110 transitions, 841 flow [2022-01-18 22:06:06,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=841, PETRI_PLACES=147, PETRI_TRANSITIONS=110} [2022-01-18 22:06:06,068 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2022-01-18 22:06:06,068 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 110 transitions, 841 flow [2022-01-18 22:06:06,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:06,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:06,069 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:06,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:06,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-18 22:06:06,284 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-01-18 22:06:06,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:06,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828486831] [2022-01-18 22:06:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:06,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:06,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828486831] [2022-01-18 22:06:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828486831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405708048] [2022-01-18 22:06:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 22:06:06,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:06,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:06,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 22:06:06,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 22:06:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:06:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:06,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405708048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:06,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:06,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 22:06:06,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576566684] [2022-01-18 22:06:06,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 22:06:06,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 22:06:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 22:06:06,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:06,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 110 transitions, 841 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:06,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:06,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:06,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:07,343 INFO L129 PetriNetUnfolder]: 129/779 cut-off events. [2022-01-18 22:06:07,343 INFO L130 PetriNetUnfolder]: For 12717/12861 co-relation queries the response was YES. [2022-01-18 22:06:07,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 779 events. 129/779 cut-off events. For 12717/12861 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4531 event pairs, 0 based on Foata normal form. 31/731 useless extension candidates. Maximal degree in co-relation 3104. Up to 160 conditions per place. [2022-01-18 22:06:07,353 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 81 changer transitions 26/210 dead transitions. [2022-01-18 22:06:07,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 3273 flow [2022-01-18 22:06:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 22:06:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-18 22:06:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-01-18 22:06:07,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-01-18 22:06:07,358 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-01-18 22:06:07,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-01-18 22:06:07,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:07,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-01-18 22:06:07,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:07,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:07,368 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:07,368 INFO L186 Difference]: Start difference. First operand has 147 places, 110 transitions, 841 flow. Second operand 33 states and 1915 transitions. [2022-01-18 22:06:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 3273 flow [2022-01-18 22:06:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2697 flow, removed 280 selfloop flow, removed 13 redundant places. [2022-01-18 22:06:07,395 INFO L242 Difference]: Finished difference. Result has 180 places, 156 transitions, 1674 flow [2022-01-18 22:06:07,395 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1674, PETRI_PLACES=180, PETRI_TRANSITIONS=156} [2022-01-18 22:06:07,396 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2022-01-18 22:06:07,396 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 156 transitions, 1674 flow [2022-01-18 22:06:07,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:07,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:07,396 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:07,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:07,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:07,619 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:07,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2022-01-18 22:06:07,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:07,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926247970] [2022-01-18 22:06:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:07,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:07,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926247970] [2022-01-18 22:06:07,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926247970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137803477] [2022-01-18 22:06:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 22:06:07,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:07,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:07,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 22:06:07,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 22:06:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:06:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:07,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:08,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137803477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:08,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:08,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 22:06:08,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254188683] [2022-01-18 22:06:08,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:08,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 22:06:08,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 22:06:08,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 22:06:08,122 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:08,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 156 transitions, 1674 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:08,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:08,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:08,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:08,841 INFO L129 PetriNetUnfolder]: 167/1049 cut-off events. [2022-01-18 22:06:08,841 INFO L130 PetriNetUnfolder]: For 33425/33642 co-relation queries the response was YES. [2022-01-18 22:06:08,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1049 events. 167/1049 cut-off events. For 33425/33642 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7171 event pairs, 0 based on Foata normal form. 44/987 useless extension candidates. Maximal degree in co-relation 5048. Up to 212 conditions per place. [2022-01-18 22:06:08,856 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 128 changer transitions 31/266 dead transitions. [2022-01-18 22:06:08,856 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 5247 flow [2022-01-18 22:06:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 22:06:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-01-18 22:06:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2022-01-18 22:06:08,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-01-18 22:06:08,859 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2022-01-18 22:06:08,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2022-01-18 22:06:08,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:08,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2022-01-18 22:06:08,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:08,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:08,871 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:08,871 INFO L186 Difference]: Start difference. First operand has 180 places, 156 transitions, 1674 flow. Second operand 36 states and 2085 transitions. [2022-01-18 22:06:08,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 5247 flow [2022-01-18 22:06:08,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 4417 flow, removed 399 selfloop flow, removed 18 redundant places. [2022-01-18 22:06:08,930 INFO L242 Difference]: Finished difference. Result has 210 places, 203 transitions, 2651 flow [2022-01-18 22:06:08,930 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2651, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2022-01-18 22:06:08,931 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 140 predicate places. [2022-01-18 22:06:08,931 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 2651 flow [2022-01-18 22:06:08,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:08,931 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:08,932 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-01-18 22:06:08,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:09,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:09,147 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1986094188, now seen corresponding path program 4 times [2022-01-18 22:06:09,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751693772] [2022-01-18 22:06:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:09,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:09,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:09,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751693772] [2022-01-18 22:06:09,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751693772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572481666] [2022-01-18 22:06:09,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 22:06:09,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:09,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:09,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 22:06:09,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 22:06:09,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 22:06:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:09,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572481666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:09,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:09,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-01-18 22:06:09,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060489503] [2022-01-18 22:06:09,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:09,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 22:06:09,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 22:06:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-01-18 22:06:09,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:09,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 2651 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:09,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:09,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:09,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:11,128 INFO L129 PetriNetUnfolder]: 264/1583 cut-off events. [2022-01-18 22:06:11,128 INFO L130 PetriNetUnfolder]: For 83404/83722 co-relation queries the response was YES. [2022-01-18 22:06:11,141 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 1583 events. 264/1583 cut-off events. For 83404/83722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10973 event pairs, 1 based on Foata normal form. 57/1480 useless extension candidates. Maximal degree in co-relation 9623. Up to 330 conditions per place. [2022-01-18 22:06:11,156 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 222 changer transitions 38/376 dead transitions. [2022-01-18 22:06:11,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 10583 flow [2022-01-18 22:06:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 22:06:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-01-18 22:06:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3011 transitions. [2022-01-18 22:06:11,161 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271978021978021 [2022-01-18 22:06:11,161 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3011 transitions. [2022-01-18 22:06:11,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3011 transitions. [2022-01-18 22:06:11,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:11,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3011 transitions. [2022-01-18 22:06:11,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.90384615384615) internal successors, (3011), 52 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:11,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:11,172 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:11,172 INFO L186 Difference]: Start difference. First operand has 210 places, 203 transitions, 2651 flow. Second operand 52 states and 3011 transitions. [2022-01-18 22:06:11,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 10583 flow [2022-01-18 22:06:11,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 376 transitions, 8479 flow, removed 1021 selfloop flow, removed 21 redundant places. [2022-01-18 22:06:11,261 INFO L242 Difference]: Finished difference. Result has 263 places, 313 transitions, 5525 flow [2022-01-18 22:06:11,261 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5525, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2022-01-18 22:06:11,262 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 193 predicate places. [2022-01-18 22:06:11,262 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 5525 flow [2022-01-18 22:06:11,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:11,263 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:11,263 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:11,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 22:06:11,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 22:06:11,483 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash -285761002, now seen corresponding path program 5 times [2022-01-18 22:06:11,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:11,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806952827] [2022-01-18 22:06:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:11,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:11,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806952827] [2022-01-18 22:06:11,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806952827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:11,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636988425] [2022-01-18 22:06:11,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 22:06:11,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:11,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:11,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:11,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 22:06:11,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 22:06:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 22:06:11,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:12,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636988425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:12,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:12,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2022-01-18 22:06:12,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780584480] [2022-01-18 22:06:12,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:12,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 22:06:12,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 22:06:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-01-18 22:06:12,872 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:12,873 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 5525 flow. Second operand has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:12,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:12,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:12,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:13,780 INFO L129 PetriNetUnfolder]: 274/1803 cut-off events. [2022-01-18 22:06:13,780 INFO L130 PetriNetUnfolder]: For 125520/125685 co-relation queries the response was YES. [2022-01-18 22:06:13,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11240 conditions, 1803 events. 274/1803 cut-off events. For 125520/125685 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12412 event pairs, 0 based on Foata normal form. 28/1637 useless extension candidates. Maximal degree in co-relation 11114. Up to 372 conditions per place. [2022-01-18 22:06:13,810 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 271 selfloop transitions, 47 changer transitions 26/389 dead transitions. [2022-01-18 22:06:13,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 10759 flow [2022-01-18 22:06:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 22:06:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-18 22:06:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2022-01-18 22:06:13,814 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2022-01-18 22:06:13,814 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2022-01-18 22:06:13,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2022-01-18 22:06:13,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:13,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2022-01-18 22:06:13,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:13,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:13,822 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:13,822 INFO L186 Difference]: Start difference. First operand has 263 places, 313 transitions, 5525 flow. Second operand 37 states and 2134 transitions. [2022-01-18 22:06:13,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 10759 flow [2022-01-18 22:06:13,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 389 transitions, 7120 flow, removed 1795 selfloop flow, removed 20 redundant places. [2022-01-18 22:06:13,998 INFO L242 Difference]: Finished difference. Result has 285 places, 331 transitions, 4313 flow [2022-01-18 22:06:13,999 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4313, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2022-01-18 22:06:13,999 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 215 predicate places. [2022-01-18 22:06:13,999 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4313 flow [2022-01-18 22:06:14,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:14,000 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:14,000 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:14,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:14,213 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash -983699664, now seen corresponding path program 6 times [2022-01-18 22:06:14,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464912525] [2022-01-18 22:06:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:14,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:14,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464912525] [2022-01-18 22:06:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464912525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:14,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386163797] [2022-01-18 22:06:14,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 22:06:14,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:14,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:14,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 22:06:14,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-18 22:06:14,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 22:06:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:14,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:15,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386163797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:15,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:15,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2022-01-18 22:06:15,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165080523] [2022-01-18 22:06:15,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:15,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 22:06:15,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 22:06:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-18 22:06:15,516 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:15,518 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4313 flow. Second operand has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:15,518 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:15,518 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:15,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:16,420 INFO L129 PetriNetUnfolder]: 332/2277 cut-off events. [2022-01-18 22:06:16,421 INFO L130 PetriNetUnfolder]: For 122119/122479 co-relation queries the response was YES. [2022-01-18 22:06:16,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2277 events. 332/2277 cut-off events. For 122119/122479 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16998 event pairs, 0 based on Foata normal form. 42/2077 useless extension candidates. Maximal degree in co-relation 11378. Up to 340 conditions per place. [2022-01-18 22:06:16,455 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 235 selfloop transitions, 169 changer transitions 26/475 dead transitions. [2022-01-18 22:06:16,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 9585 flow [2022-01-18 22:06:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 22:06:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-01-18 22:06:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2022-01-18 22:06:16,459 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2022-01-18 22:06:16,459 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2022-01-18 22:06:16,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2022-01-18 22:06:16,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:16,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2022-01-18 22:06:16,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:16,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:16,469 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:16,469 INFO L186 Difference]: Start difference. First operand has 285 places, 331 transitions, 4313 flow. Second operand 45 states and 2593 transitions. [2022-01-18 22:06:16,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 9585 flow [2022-01-18 22:06:16,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 475 transitions, 8826 flow, removed 354 selfloop flow, removed 23 redundant places. [2022-01-18 22:06:16,658 INFO L242 Difference]: Finished difference. Result has 318 places, 388 transitions, 5550 flow [2022-01-18 22:06:16,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5550, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2022-01-18 22:06:16,659 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2022-01-18 22:06:16,659 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 5550 flow [2022-01-18 22:06:16,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:16,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:16,660 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:16,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:16,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1731536892, now seen corresponding path program 7 times [2022-01-18 22:06:16,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893675864] [2022-01-18 22:06:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:16,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:17,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893675864] [2022-01-18 22:06:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893675864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681077907] [2022-01-18 22:06:17,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 22:06:17,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:17,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:17,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 22:06:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 22:06:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:17,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:18,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681077907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:18,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:18,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-01-18 22:06:18,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152595187] [2022-01-18 22:06:18,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:18,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 22:06:18,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 22:06:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 22:06:18,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:18,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 5550 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:18,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:18,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:18,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:19,645 INFO L129 PetriNetUnfolder]: 397/2805 cut-off events. [2022-01-18 22:06:19,645 INFO L130 PetriNetUnfolder]: For 184595/184879 co-relation queries the response was YES. [2022-01-18 22:06:19,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2805 events. 397/2805 cut-off events. For 184595/184879 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 22325 event pairs, 0 based on Foata normal form. 51/2560 useless extension candidates. Maximal degree in co-relation 15027. Up to 416 conditions per place. [2022-01-18 22:06:19,695 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 122 selfloop transitions, 348 changer transitions 26/541 dead transitions. [2022-01-18 22:06:19,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 541 transitions, 12338 flow [2022-01-18 22:06:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 22:06:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-01-18 22:06:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2022-01-18 22:06:19,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2022-01-18 22:06:19,699 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2022-01-18 22:06:19,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2022-01-18 22:06:19,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:19,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2022-01-18 22:06:19,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:19,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:19,708 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:19,708 INFO L186 Difference]: Start difference. First operand has 318 places, 388 transitions, 5550 flow. Second operand 51 states and 2942 transitions. [2022-01-18 22:06:19,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 541 transitions, 12338 flow [2022-01-18 22:06:19,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 541 transitions, 11012 flow, removed 576 selfloop flow, removed 31 redundant places. [2022-01-18 22:06:19,946 INFO L242 Difference]: Finished difference. Result has 352 places, 458 transitions, 7401 flow [2022-01-18 22:06:19,947 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7401, PETRI_PLACES=352, PETRI_TRANSITIONS=458} [2022-01-18 22:06:19,947 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 282 predicate places. [2022-01-18 22:06:19,947 INFO L470 AbstractCegarLoop]: Abstraction has has 352 places, 458 transitions, 7401 flow [2022-01-18 22:06:19,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:19,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:19,948 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:19,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:20,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 22:06:20,149 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -693522108, now seen corresponding path program 8 times [2022-01-18 22:06:20,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:20,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546537602] [2022-01-18 22:06:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:20,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 22:06:20,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:20,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546537602] [2022-01-18 22:06:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546537602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422415509] [2022-01-18 22:06:20,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 22:06:20,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:20,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:20,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:20,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 22:06:20,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 22:06:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 22:06:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 22:06:20,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 22:06:21,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422415509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:21,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:21,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-01-18 22:06:21,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327270586] [2022-01-18 22:06:21,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:21,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 22:06:21,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 22:06:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 22:06:21,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:21,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 458 transitions, 7401 flow. Second operand has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:21,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:21,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:21,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:22,853 INFO L129 PetriNetUnfolder]: 494/3392 cut-off events. [2022-01-18 22:06:22,853 INFO L130 PetriNetUnfolder]: For 296375/296794 co-relation queries the response was YES. [2022-01-18 22:06:22,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20583 conditions, 3392 events. 494/3392 cut-off events. For 296375/296794 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 27950 event pairs, 0 based on Foata normal form. 65/3099 useless extension candidates. Maximal degree in co-relation 20421. Up to 510 conditions per place. [2022-01-18 22:06:22,908 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 125 selfloop transitions, 443 changer transitions 26/639 dead transitions. [2022-01-18 22:06:22,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 639 transitions, 15782 flow [2022-01-18 22:06:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 22:06:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-01-18 22:06:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3356 transitions. [2022-01-18 22:06:22,913 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8266009852216749 [2022-01-18 22:06:22,913 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3356 transitions. [2022-01-18 22:06:22,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3356 transitions. [2022-01-18 22:06:22,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:22,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3356 transitions. [2022-01-18 22:06:22,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 57.86206896551724) internal successors, (3356), 58 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:22,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:22,924 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 70.0) internal successors, (4130), 59 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:22,925 INFO L186 Difference]: Start difference. First operand has 352 places, 458 transitions, 7401 flow. Second operand 58 states and 3356 transitions. [2022-01-18 22:06:22,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 639 transitions, 15782 flow [2022-01-18 22:06:23,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 639 transitions, 13590 flow, removed 1047 selfloop flow, removed 22 redundant places. [2022-01-18 22:06:23,384 INFO L242 Difference]: Finished difference. Result has 403 places, 538 transitions, 9409 flow [2022-01-18 22:06:23,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9409, PETRI_PLACES=403, PETRI_TRANSITIONS=538} [2022-01-18 22:06:23,385 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 333 predicate places. [2022-01-18 22:06:23,385 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 538 transitions, 9409 flow [2022-01-18 22:06:23,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:23,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:23,385 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:23,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 22:06:23,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1774382462, now seen corresponding path program 9 times [2022-01-18 22:06:23,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:23,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049909872] [2022-01-18 22:06:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:23,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:23,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:23,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049909872] [2022-01-18 22:06:23,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049909872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:23,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927779652] [2022-01-18 22:06:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 22:06:23,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:23,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:23,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 22:06:23,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-18 22:06:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 22:06:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:06:24,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927779652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:24,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:24,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2022-01-18 22:06:24,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047090100] [2022-01-18 22:06:24,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:24,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 22:06:24,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:24,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 22:06:24,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-01-18 22:06:24,464 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:24,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 538 transitions, 9409 flow. Second operand has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:24,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:24,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:24,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:25,876 INFO L129 PetriNetUnfolder]: 518/3513 cut-off events. [2022-01-18 22:06:25,876 INFO L130 PetriNetUnfolder]: For 363973/364322 co-relation queries the response was YES. [2022-01-18 22:06:25,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23062 conditions, 3513 events. 518/3513 cut-off events. For 363973/364322 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29048 event pairs, 1 based on Foata normal form. 73/3217 useless extension candidates. Maximal degree in co-relation 22883. Up to 544 conditions per place. [2022-01-18 22:06:26,021 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 104 selfloop transitions, 455 changer transitions 14/618 dead transitions. [2022-01-18 22:06:26,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 15889 flow [2022-01-18 22:06:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 22:06:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-18 22:06:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2887 transitions. [2022-01-18 22:06:26,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8248571428571428 [2022-01-18 22:06:26,026 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2887 transitions. [2022-01-18 22:06:26,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2887 transitions. [2022-01-18 22:06:26,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:26,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2887 transitions. [2022-01-18 22:06:26,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.74) internal successors, (2887), 50 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:26,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:26,034 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:26,035 INFO L186 Difference]: Start difference. First operand has 403 places, 538 transitions, 9409 flow. Second operand 50 states and 2887 transitions. [2022-01-18 22:06:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 15889 flow [2022-01-18 22:06:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 618 transitions, 13835 flow, removed 776 selfloop flow, removed 38 redundant places. [2022-01-18 22:06:26,580 INFO L242 Difference]: Finished difference. Result has 418 places, 561 transitions, 10008 flow [2022-01-18 22:06:26,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10008, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2022-01-18 22:06:26,581 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 348 predicate places. [2022-01-18 22:06:26,582 INFO L470 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 10008 flow [2022-01-18 22:06:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.370370370370374) internal successors, (1522), 27 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:26,582 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:26,582 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:26,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 22:06:26,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 22:06:26,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -341929228, now seen corresponding path program 10 times [2022-01-18 22:06:26,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451723478] [2022-01-18 22:06:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:26,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:27,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451723478] [2022-01-18 22:06:27,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451723478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713135087] [2022-01-18 22:06:27,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 22:06:27,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:27,050 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:27,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 22:06:27,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 22:06:27,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 22:06:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:06:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:06:27,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713135087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:06:27,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:06:27,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2022-01-18 22:06:27,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124062854] [2022-01-18 22:06:27,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:06:27,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 22:06:27,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 22:06:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-01-18 22:06:27,671 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:06:27,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 10008 flow. Second operand has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:27,672 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:27,672 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:06:27,672 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:29,557 INFO L129 PetriNetUnfolder]: 513/3563 cut-off events. [2022-01-18 22:06:29,557 INFO L130 PetriNetUnfolder]: For 392835/393119 co-relation queries the response was YES. [2022-01-18 22:06:29,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23441 conditions, 3563 events. 513/3563 cut-off events. For 392835/393119 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 29666 event pairs, 0 based on Foata normal form. 89/3278 useless extension candidates. Maximal degree in co-relation 23259. Up to 540 conditions per place. [2022-01-18 22:06:29,617 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 115 selfloop transitions, 484 changer transitions 31/675 dead transitions. [2022-01-18 22:06:29,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 675 transitions, 17970 flow [2022-01-18 22:06:29,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 22:06:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-01-18 22:06:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3405 transitions. [2022-01-18 22:06:29,621 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8244552058111381 [2022-01-18 22:06:29,621 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3405 transitions. [2022-01-18 22:06:29,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3405 transitions. [2022-01-18 22:06:29,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:29,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3405 transitions. [2022-01-18 22:06:29,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.71186440677966) internal successors, (3405), 59 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:29,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:29,630 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 70.0) internal successors, (4200), 60 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:29,630 INFO L186 Difference]: Start difference. First operand has 418 places, 561 transitions, 10008 flow. Second operand 59 states and 3405 transitions. [2022-01-18 22:06:29,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 675 transitions, 17970 flow [2022-01-18 22:06:30,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 16525 flow, removed 558 selfloop flow, removed 24 redundant places. [2022-01-18 22:06:30,212 INFO L242 Difference]: Finished difference. Result has 464 places, 574 transitions, 11051 flow [2022-01-18 22:06:30,212 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=11051, PETRI_PLACES=464, PETRI_TRANSITIONS=574} [2022-01-18 22:06:30,212 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 394 predicate places. [2022-01-18 22:06:30,213 INFO L470 AbstractCegarLoop]: Abstraction has has 464 places, 574 transitions, 11051 flow [2022-01-18 22:06:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.333333333333336) internal successors, (1690), 30 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:30,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:06:30,213 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:06:30,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 22:06:30,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 22:06:30,422 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:06:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:06:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1673947068, now seen corresponding path program 11 times [2022-01-18 22:06:30,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:06:30,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891085788] [2022-01-18 22:06:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:06:30,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:06:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:06:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 368 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-18 22:06:30,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:06:30,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891085788] [2022-01-18 22:06:30,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891085788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:06:30,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420259300] [2022-01-18 22:06:30,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 22:06:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:06:30,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:06:30,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:06:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 22:06:30,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-18 22:06:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:06:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 22:06:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:06:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-18 22:06:31,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 22:06:31,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420259300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:06:31,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 22:06:31,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-01-18 22:06:31,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761076713] [2022-01-18 22:06:31,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:06:31,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 22:06:31,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:06:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 22:06:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-01-18 22:06:31,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-01-18 22:06:31,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 574 transitions, 11051 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:31,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:06:31,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-01-18 22:06:31,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:06:35,644 INFO L129 PetriNetUnfolder]: 2729/14107 cut-off events. [2022-01-18 22:06:35,644 INFO L130 PetriNetUnfolder]: For 1261836/1262063 co-relation queries the response was YES. [2022-01-18 22:06:35,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83067 conditions, 14107 events. 2729/14107 cut-off events. For 1261836/1262063 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 167496 event pairs, 648 based on Foata normal form. 79/12622 useless extension candidates. Maximal degree in co-relation 82906. Up to 1994 conditions per place. [2022-01-18 22:06:35,813 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 614/614 dead transitions. [2022-01-18 22:06:35,814 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 614 transitions, 9999 flow [2022-01-18 22:06:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 22:06:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-18 22:06:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2022-01-18 22:06:35,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2022-01-18 22:06:35,816 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2022-01-18 22:06:35,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2022-01-18 22:06:35,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:06:35,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2022-01-18 22:06:35,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:35,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:35,822 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:35,822 INFO L186 Difference]: Start difference. First operand has 464 places, 574 transitions, 11051 flow. Second operand 33 states and 2000 transitions. [2022-01-18 22:06:35,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 614 transitions, 9999 flow [2022-01-18 22:06:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 614 transitions, 8386 flow, removed 197 selfloop flow, removed 73 redundant places. [2022-01-18 22:06:36,675 INFO L242 Difference]: Finished difference. Result has 407 places, 0 transitions, 0 flow [2022-01-18 22:06:36,675 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=407, PETRI_TRANSITIONS=0} [2022-01-18 22:06:36,675 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 337 predicate places. [2022-01-18 22:06:36,675 INFO L470 AbstractCegarLoop]: Abstraction has has 407 places, 0 transitions, 0 flow [2022-01-18 22:06:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:06:36,677 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-18 22:06:36,678 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 22:06:36,678 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 22:06:36,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 22:06:36,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 22:06:36,887 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1] [2022-01-18 22:06:36,889 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 22:06:36,889 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 22:06:36,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 10:06:36 BasicIcfg [2022-01-18 22:06:36,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 22:06:36,891 INFO L158 Benchmark]: Toolchain (without parser) took 36067.02ms. Allocated memory was 373.3MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 319.5MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 934.8MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,892 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 373.3MB. Free memory is still 337.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 22:06:36,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.18ms. Allocated memory is still 373.3MB. Free memory was 319.3MB in the beginning and 338.2MB in the end (delta: -18.9MB). Peak memory consumption was 17.5MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.99ms. Allocated memory is still 373.3MB. Free memory was 338.2MB in the beginning and 336.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,892 INFO L158 Benchmark]: Boogie Preprocessor took 30.88ms. Allocated memory is still 373.3MB. Free memory was 336.6MB in the beginning and 335.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,893 INFO L158 Benchmark]: RCFGBuilder took 270.95ms. Allocated memory is still 373.3MB. Free memory was 335.1MB in the beginning and 323.5MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,893 INFO L158 Benchmark]: TraceAbstraction took 35292.91ms. Allocated memory was 373.3MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 323.1MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 940.4MB. Max. memory is 16.0GB. [2022-01-18 22:06:36,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 373.3MB. Free memory is still 337.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 415.18ms. Allocated memory is still 373.3MB. Free memory was 319.3MB in the beginning and 338.2MB in the end (delta: -18.9MB). Peak memory consumption was 17.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.99ms. Allocated memory is still 373.3MB. Free memory was 338.2MB in the beginning and 336.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.88ms. Allocated memory is still 373.3MB. Free memory was 336.6MB in the beginning and 335.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 270.95ms. Allocated memory is still 373.3MB. Free memory was 335.1MB in the beginning and 323.5MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 35292.91ms. Allocated memory was 373.3MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 323.1MB in the beginning and 1.5GB in the end (delta: -1.1GB). Peak memory consumption was 940.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 35.2s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 20.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1063 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1063 mSDsluCounter, 312 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 1624 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2890 IncrementalHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1624 mSolverCounterUnsat, 87 mSDtfsCounter, 2890 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 2184 SyntacticMatches, 2 SemanticMatches, 748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11982 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11051occurred in iteration=17, InterpolantAutomatonStates: 558, 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 2640 NumberOfCodeBlocks, 2635 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3662 ConstructedInterpolants, 0 QuantifiedInterpolants, 14332 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2624 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 941/7204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-18 22:06:36,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...