/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-Before.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 08:04:45,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 08:04:45,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 08:04:45,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 08:04:45,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 08:04:46,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 08:04:46,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 08:04:46,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 08:04:46,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 08:04:46,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 08:04:46,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 08:04:46,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 08:04:46,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 08:04:46,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 08:04:46,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 08:04:46,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 08:04:46,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 08:04:46,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 08:04:46,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 08:04:46,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 08:04:46,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 08:04:46,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 08:04:46,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 08:04:46,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 08:04:46,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 08:04:46,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 08:04:46,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 08:04:46,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 08:04:46,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 08:04:46,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 08:04:46,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 08:04:46,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 08:04:46,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 08:04:46,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 08:04:46,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 08:04:46,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 08:04:46,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 08:04:46,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 08:04:46,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 08:04:46,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 08:04:46,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 08:04:46,041 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-Before.epf [2022-01-19 08:04:46,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 08:04:46,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 08:04:46,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 08:04:46,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 08:04:46,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 08:04:46,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 08:04:46,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 08:04:46,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 08:04:46,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:04:46,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 08:04:46,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 08:04:46,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 08:04:46,080 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 08:04:46,080 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 08:04:46,080 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 08:04:46,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 08:04:46,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 08:04:46,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 08:04:46,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 08:04:46,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 08:04:46,338 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 08:04:46,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-01-19 08:04:46,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb901e8b1/a045a3c1f1ed4e96a40cff69c56cfae5/FLAG387cd14b7 [2022-01-19 08:04:46,801 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 08:04:46,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2022-01-19 08:04:46,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb901e8b1/a045a3c1f1ed4e96a40cff69c56cfae5/FLAG387cd14b7 [2022-01-19 08:04:46,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb901e8b1/a045a3c1f1ed4e96a40cff69c56cfae5 [2022-01-19 08:04:46,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 08:04:46,834 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 08:04:46,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 08:04:46,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 08:04:46,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 08:04:46,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:04:46" (1/1) ... [2022-01-19 08:04:46,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23208438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:46, skipping insertion in model container [2022-01-19 08:04:46,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 08:04:46" (1/1) ... [2022-01-19 08:04:46,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 08:04:46,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 08:04:47,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-01-19 08:04:47,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:04:47,044 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 08:04:47,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-01-19 08:04:47,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 08:04:47,080 INFO L208 MainTranslator]: Completed translation [2022-01-19 08:04:47,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47 WrapperNode [2022-01-19 08:04:47,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 08:04:47,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 08:04:47,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 08:04:47,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 08:04:47,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,119 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-01-19 08:04:47,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 08:04:47,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 08:04:47,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 08:04:47,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 08:04:47,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 08:04:47,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 08:04:47,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 08:04:47,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 08:04:47,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (1/1) ... [2022-01-19 08:04:47,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 08:04:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:47,199 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) [2022-01-19 08:04:47,212 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 [2022-01-19 08:04:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 08:04:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 08:04:47,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 08:04:47,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 08:04:47,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 08:04:47,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 08:04:47,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 08:04:47,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 08:04:47,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 08:04:47,236 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-19 08:04:47,321 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 08:04:47,323 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 08:04:47,631 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 08:04:47,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 08:04:47,836 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-19 08:04:47,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:04:47 BoogieIcfgContainer [2022-01-19 08:04:47,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 08:04:47,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 08:04:47,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 08:04:47,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 08:04:47,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 08:04:46" (1/3) ... [2022-01-19 08:04:47,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302d4ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:04:47, skipping insertion in model container [2022-01-19 08:04:47,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 08:04:47" (2/3) ... [2022-01-19 08:04:47,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302d4ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 08:04:47, skipping insertion in model container [2022-01-19 08:04:47,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 08:04:47" (3/3) ... [2022-01-19 08:04:47,849 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-01-19 08:04:47,854 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 08:04:47,854 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 08:04:47,854 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 08:04:47,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,903 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,904 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,905 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,906 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,907 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,908 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,909 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,910 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,911 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,914 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,915 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,916 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~short4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,922 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~short11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,925 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 08:04:47,927 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 08:04:47,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 08:04:47,973 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 [2022-01-19 08:04:47,974 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 08:04:47,985 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-01-19 08:04:48,041 INFO L129 PetriNetUnfolder]: 13/163 cut-off events. [2022-01-19 08:04:48,042 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:04:48,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 84 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-01-19 08:04:48,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-01-19 08:04:48,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-01-19 08:04:48,113 INFO L129 PetriNetUnfolder]: 13/153 cut-off events. [2022-01-19 08:04:48,113 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 08:04:48,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:48,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:48,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash -971864850, now seen corresponding path program 1 times [2022-01-19 08:04:48,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:48,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233242732] [2022-01-19 08:04:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:48,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233242732] [2022-01-19 08:04:48,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233242732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:48,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:48,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:48,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923965430] [2022-01-19 08:04:48,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:48,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:48,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:48,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-01-19 08:04:48,618 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:48,619 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:48,619 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-01-19 08:04:48,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:48,790 INFO L129 PetriNetUnfolder]: 14/195 cut-off events. [2022-01-19 08:04:48,791 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-01-19 08:04:48,792 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 195 events. 14/195 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 261 event pairs, 0 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 150. Up to 23 conditions per place. [2022-01-19 08:04:48,794 INFO L132 encePairwiseOnDemand]: 145/165 looper letters, 28 selfloop transitions, 3 changer transitions 10/154 dead transitions. [2022-01-19 08:04:48,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 411 flow [2022-01-19 08:04:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-19 08:04:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-01-19 08:04:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 915 transitions. [2022-01-19 08:04:48,810 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-01-19 08:04:48,811 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 915 transitions. [2022-01-19 08:04:48,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 915 transitions. [2022-01-19 08:04:48,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:48,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 915 transitions. [2022-01-19 08:04:48,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:48,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:48,829 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:48,831 INFO L186 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 7 states and 915 transitions. [2022-01-19 08:04:48,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 411 flow [2022-01-19 08:04:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 154 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 08:04:48,838 INFO L242 Difference]: Finished difference. Result has 153 places, 142 transitions, 307 flow [2022-01-19 08:04:48,840 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-01-19 08:04:48,843 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2022-01-19 08:04:48,843 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 307 flow [2022-01-19 08:04:48,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:48,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:48,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:48,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 08:04:48,845 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash 202378132, now seen corresponding path program 1 times [2022-01-19 08:04:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933165335] [2022-01-19 08:04:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:48,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:49,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:49,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933165335] [2022-01-19 08:04:49,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933165335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779153092] [2022-01-19 08:04:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:49,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:49,036 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) [2022-01-19 08:04:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-19 08:04:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 08:04:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 08:04:49,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:04:49,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779153092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:49,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:04:49,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-01-19 08:04:49,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427806310] [2022-01-19 08:04:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:49,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 08:04:49,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 08:04:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:04:49,766 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-01-19 08:04:49,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:49,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:49,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-01-19 08:04:49,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:49,935 INFO L129 PetriNetUnfolder]: 15/265 cut-off events. [2022-01-19 08:04:49,936 INFO L130 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2022-01-19 08:04:49,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 509 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-01-19 08:04:49,938 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2022-01-19 08:04:49,938 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 467 flow [2022-01-19 08:04:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-19 08:04:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-19 08:04:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2022-01-19 08:04:49,942 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2022-01-19 08:04:49,942 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2022-01-19 08:04:49,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2022-01-19 08:04:49,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:49,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2022-01-19 08:04:49,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:49,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:49,949 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:49,949 INFO L186 Difference]: Start difference. First operand has 153 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2022-01-19 08:04:49,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 467 flow [2022-01-19 08:04:49,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 08:04:49,954 INFO L242 Difference]: Finished difference. Result has 152 places, 143 transitions, 332 flow [2022-01-19 08:04:49,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2022-01-19 08:04:49,955 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2022-01-19 08:04:49,955 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 332 flow [2022-01-19 08:04:49,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:49,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:49,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:49,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-19 08:04:50,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:50,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:50,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:50,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1935558459, now seen corresponding path program 1 times [2022-01-19 08:04:50,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:50,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048903333] [2022-01-19 08:04:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:50,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:50,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048903333] [2022-01-19 08:04:50,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048903333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:50,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:50,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:50,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11686271] [2022-01-19 08:04:50,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:50,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:50,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:50,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:50,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:50,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:50,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:50,378 INFO L129 PetriNetUnfolder]: 118/434 cut-off events. [2022-01-19 08:04:50,379 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-01-19 08:04:50,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 434 events. 118/434 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1592 event pairs, 37 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 662. Up to 126 conditions per place. [2022-01-19 08:04:50,383 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 36 selfloop transitions, 5 changer transitions 4/168 dead transitions. [2022-01-19 08:04:50,384 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 168 transitions, 491 flow [2022-01-19 08:04:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:04:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:04:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 864 transitions. [2022-01-19 08:04:50,386 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8727272727272727 [2022-01-19 08:04:50,386 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 864 transitions. [2022-01-19 08:04:50,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 864 transitions. [2022-01-19 08:04:50,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:50,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 864 transitions. [2022-01-19 08:04:50,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,391 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,392 INFO L186 Difference]: Start difference. First operand has 152 places, 143 transitions, 332 flow. Second operand 6 states and 864 transitions. [2022-01-19 08:04:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 168 transitions, 491 flow [2022-01-19 08:04:50,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 168 transitions, 475 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-01-19 08:04:50,397 INFO L242 Difference]: Finished difference. Result has 152 places, 145 transitions, 342 flow [2022-01-19 08:04:50,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2022-01-19 08:04:50,399 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2022-01-19 08:04:50,399 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 342 flow [2022-01-19 08:04:50,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:50,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:50,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 08:04:50,401 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -774645913, now seen corresponding path program 2 times [2022-01-19 08:04:50,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:50,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731648390] [2022-01-19 08:04:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:50,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:50,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731648390] [2022-01-19 08:04:50,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731648390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228203622] [2022-01-19 08:04:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:04:50,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:50,508 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) [2022-01-19 08:04:50,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-19 08:04:50,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:04:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:04:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:04:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:50,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228203622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:50,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:50,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 08:04:50,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876969491] [2022-01-19 08:04:50,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:50,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 08:04:50,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:50,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 08:04:50,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 08:04:50,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:50,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 342 flow. Second operand has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:50,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:50,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:50,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:51,219 INFO L129 PetriNetUnfolder]: 192/589 cut-off events. [2022-01-19 08:04:51,219 INFO L130 PetriNetUnfolder]: For 182/182 co-relation queries the response was YES. [2022-01-19 08:04:51,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 589 events. 192/589 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2561 event pairs, 7 based on Foata normal form. 9/593 useless extension candidates. Maximal degree in co-relation 1152. Up to 71 conditions per place. [2022-01-19 08:04:51,225 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 72 selfloop transitions, 31 changer transitions 1/227 dead transitions. [2022-01-19 08:04:51,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 227 transitions, 842 flow [2022-01-19 08:04:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 08:04:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 08:04:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2008 transitions. [2022-01-19 08:04:51,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8692640692640693 [2022-01-19 08:04:51,232 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2008 transitions. [2022-01-19 08:04:51,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2008 transitions. [2022-01-19 08:04:51,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:51,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2008 transitions. [2022-01-19 08:04:51,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.42857142857142) internal successors, (2008), 14 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:51,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:51,242 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:51,242 INFO L186 Difference]: Start difference. First operand has 152 places, 145 transitions, 342 flow. Second operand 14 states and 2008 transitions. [2022-01-19 08:04:51,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 227 transitions, 842 flow [2022-01-19 08:04:51,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 227 transitions, 815 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-01-19 08:04:51,250 INFO L242 Difference]: Finished difference. Result has 168 places, 177 transitions, 554 flow [2022-01-19 08:04:51,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=554, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2022-01-19 08:04:51,252 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 20 predicate places. [2022-01-19 08:04:51,252 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 554 flow [2022-01-19 08:04:51,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.66666666666666) internal successors, (1257), 9 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:51,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:51,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:51,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-19 08:04:51,471 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,SelfDestructingSolverStorable3 [2022-01-19 08:04:51,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1462097601, now seen corresponding path program 1 times [2022-01-19 08:04:51,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212947390] [2022-01-19 08:04:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:51,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:51,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:51,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212947390] [2022-01-19 08:04:51,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212947390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:51,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118145829] [2022-01-19 08:04:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:51,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:51,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:51,536 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) [2022-01-19 08:04:51,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-19 08:04:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 08:04:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:52,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 08:04:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118145829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:52,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 08:04:52,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-01-19 08:04:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680580533] [2022-01-19 08:04:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 08:04:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 08:04:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:04:52,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-01-19 08:04:52,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:52,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-01-19 08:04:52,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:52,143 INFO L129 PetriNetUnfolder]: 68/475 cut-off events. [2022-01-19 08:04:52,143 INFO L130 PetriNetUnfolder]: For 284/300 co-relation queries the response was YES. [2022-01-19 08:04:52,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 475 events. 68/475 cut-off events. For 284/300 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1986 event pairs, 14 based on Foata normal form. 12/475 useless extension candidates. Maximal degree in co-relation 817. Up to 76 conditions per place. [2022-01-19 08:04:52,147 INFO L132 encePairwiseOnDemand]: 155/165 looper letters, 34 selfloop transitions, 7 changer transitions 5/186 dead transitions. [2022-01-19 08:04:52,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 186 transitions, 668 flow [2022-01-19 08:04:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 08:04:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 08:04:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2022-01-19 08:04:52,150 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7674242424242425 [2022-01-19 08:04:52,150 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2022-01-19 08:04:52,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2022-01-19 08:04:52,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:52,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2022-01-19 08:04:52,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,155 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,155 INFO L186 Difference]: Start difference. First operand has 168 places, 177 transitions, 554 flow. Second operand 8 states and 1013 transitions. [2022-01-19 08:04:52,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 186 transitions, 668 flow [2022-01-19 08:04:52,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 186 transitions, 666 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-01-19 08:04:52,162 INFO L242 Difference]: Finished difference. Result has 177 places, 178 transitions, 578 flow [2022-01-19 08:04:52,162 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=177, PETRI_TRANSITIONS=178} [2022-01-19 08:04:52,164 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 29 predicate places. [2022-01-19 08:04:52,164 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 178 transitions, 578 flow [2022-01-19 08:04:52,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,165 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:52,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:52,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:52,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:52,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash -533874036, now seen corresponding path program 1 times [2022-01-19 08:04:52,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597657082] [2022-01-19 08:04:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:52,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:52,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597657082] [2022-01-19 08:04:52,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597657082] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:52,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:52,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:52,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44193287] [2022-01-19 08:04:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:52,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:52,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:52,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:52,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 178 transitions, 578 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:52,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:52,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:52,578 INFO L129 PetriNetUnfolder]: 216/682 cut-off events. [2022-01-19 08:04:52,579 INFO L130 PetriNetUnfolder]: For 818/833 co-relation queries the response was YES. [2022-01-19 08:04:52,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 682 events. 216/682 cut-off events. For 818/833 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3308 event pairs, 80 based on Foata normal form. 8/678 useless extension candidates. Maximal degree in co-relation 1693. Up to 229 conditions per place. [2022-01-19 08:04:52,584 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 69 selfloop transitions, 16 changer transitions 1/210 dead transitions. [2022-01-19 08:04:52,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 914 flow [2022-01-19 08:04:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:04:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:04:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 737 transitions. [2022-01-19 08:04:52,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2022-01-19 08:04:52,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 737 transitions. [2022-01-19 08:04:52,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 737 transitions. [2022-01-19 08:04:52,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:52,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 737 transitions. [2022-01-19 08:04:52,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,592 INFO L186 Difference]: Start difference. First operand has 177 places, 178 transitions, 578 flow. Second operand 5 states and 737 transitions. [2022-01-19 08:04:52,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 914 flow [2022-01-19 08:04:52,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 210 transitions, 890 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-01-19 08:04:52,599 INFO L242 Difference]: Finished difference. Result has 176 places, 185 transitions, 665 flow [2022-01-19 08:04:52,600 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=665, PETRI_PLACES=176, PETRI_TRANSITIONS=185} [2022-01-19 08:04:52,602 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 28 predicate places. [2022-01-19 08:04:52,602 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 185 transitions, 665 flow [2022-01-19 08:04:52,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:52,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:52,603 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-19 08:04:52,603 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1873111084, now seen corresponding path program 2 times [2022-01-19 08:04:52,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121941392] [2022-01-19 08:04:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:52,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:52,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121941392] [2022-01-19 08:04:52,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121941392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:52,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491589095] [2022-01-19 08:04:52,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:04:52,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:52,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:52,675 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) [2022-01-19 08:04:52,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-19 08:04:52,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:04:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:04:52,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:04:52,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:53,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:53,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491589095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:53,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:53,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 08:04:53,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902476463] [2022-01-19 08:04:53,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:53,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:04:53,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:53,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:04:53,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:04:53,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:53,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 185 transitions, 665 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:53,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:53,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:53,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:53,390 INFO L129 PetriNetUnfolder]: 228/776 cut-off events. [2022-01-19 08:04:53,390 INFO L130 PetriNetUnfolder]: For 1144/1148 co-relation queries the response was YES. [2022-01-19 08:04:53,393 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 776 events. 228/776 cut-off events. For 1144/1148 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4130 event pairs, 38 based on Foata normal form. 12/781 useless extension candidates. Maximal degree in co-relation 1959. Up to 137 conditions per place. [2022-01-19 08:04:53,397 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 74 selfloop transitions, 48 changer transitions 1/247 dead transitions. [2022-01-19 08:04:53,397 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 247 transitions, 1212 flow [2022-01-19 08:04:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 08:04:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 08:04:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1308 transitions. [2022-01-19 08:04:53,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8808080808080808 [2022-01-19 08:04:53,401 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1308 transitions. [2022-01-19 08:04:53,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1308 transitions. [2022-01-19 08:04:53,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:53,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1308 transitions. [2022-01-19 08:04:53,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.33333333333334) internal successors, (1308), 9 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:53,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:53,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:53,407 INFO L186 Difference]: Start difference. First operand has 176 places, 185 transitions, 665 flow. Second operand 9 states and 1308 transitions. [2022-01-19 08:04:53,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 247 transitions, 1212 flow [2022-01-19 08:04:53,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 1200 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 08:04:53,416 INFO L242 Difference]: Finished difference. Result has 188 places, 205 transitions, 945 flow [2022-01-19 08:04:53,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=945, PETRI_PLACES=188, PETRI_TRANSITIONS=205} [2022-01-19 08:04:53,416 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 40 predicate places. [2022-01-19 08:04:53,417 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 205 transitions, 945 flow [2022-01-19 08:04:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:53,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:53,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:53,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:53,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:53,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1869100938, now seen corresponding path program 1 times [2022-01-19 08:04:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148446336] [2022-01-19 08:04:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:53,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:53,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148446336] [2022-01-19 08:04:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148446336] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110404708] [2022-01-19 08:04:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:53,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:53,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:53,686 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) [2022-01-19 08:04:53,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-19 08:04:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:04:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:54,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:54,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110404708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:54,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:54,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-01-19 08:04:54,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887415526] [2022-01-19 08:04:54,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:54,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 08:04:54,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 08:04:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-19 08:04:54,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:54,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 205 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:54,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:54,197 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:54,451 INFO L129 PetriNetUnfolder]: 260/848 cut-off events. [2022-01-19 08:04:54,452 INFO L130 PetriNetUnfolder]: For 1943/1943 co-relation queries the response was YES. [2022-01-19 08:04:54,455 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 848 events. 260/848 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4670 event pairs, 27 based on Foata normal form. 5/846 useless extension candidates. Maximal degree in co-relation 2471. Up to 109 conditions per place. [2022-01-19 08:04:54,459 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 87 selfloop transitions, 75 changer transitions 0/286 dead transitions. [2022-01-19 08:04:54,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 286 transitions, 1760 flow [2022-01-19 08:04:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-19 08:04:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-01-19 08:04:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2004 transitions. [2022-01-19 08:04:54,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8675324675324675 [2022-01-19 08:04:54,464 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2004 transitions. [2022-01-19 08:04:54,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2004 transitions. [2022-01-19 08:04:54,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:54,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2004 transitions. [2022-01-19 08:04:54,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,473 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,473 INFO L186 Difference]: Start difference. First operand has 188 places, 205 transitions, 945 flow. Second operand 14 states and 2004 transitions. [2022-01-19 08:04:54,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 286 transitions, 1760 flow [2022-01-19 08:04:54,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 286 transitions, 1726 flow, removed 17 selfloop flow, removed 0 redundant places. [2022-01-19 08:04:54,487 INFO L242 Difference]: Finished difference. Result has 205 places, 237 transitions, 1402 flow [2022-01-19 08:04:54,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1402, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2022-01-19 08:04:54,488 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 57 predicate places. [2022-01-19 08:04:54,488 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 1402 flow [2022-01-19 08:04:54,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:54,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:54,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:54,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:54,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash -89082242, now seen corresponding path program 2 times [2022-01-19 08:04:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316020979] [2022-01-19 08:04:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:54,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:54,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:54,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316020979] [2022-01-19 08:04:54,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316020979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:54,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:54,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:54,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962799926] [2022-01-19 08:04:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:54,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:54,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:54,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:54,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 1402 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:54,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:54,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:54,920 INFO L129 PetriNetUnfolder]: 260/873 cut-off events. [2022-01-19 08:04:54,920 INFO L130 PetriNetUnfolder]: For 2861/2863 co-relation queries the response was YES. [2022-01-19 08:04:54,924 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 873 events. 260/873 cut-off events. For 2861/2863 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4959 event pairs, 91 based on Foata normal form. 2/865 useless extension candidates. Maximal degree in co-relation 2765. Up to 282 conditions per place. [2022-01-19 08:04:54,928 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 110 selfloop transitions, 24 changer transitions 6/264 dead transitions. [2022-01-19 08:04:54,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 264 transitions, 1905 flow [2022-01-19 08:04:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:04:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:04:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-01-19 08:04:54,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-01-19 08:04:54,931 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-01-19 08:04:54,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-01-19 08:04:54,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:54,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-01-19 08:04:54,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,935 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,935 INFO L186 Difference]: Start difference. First operand has 205 places, 237 transitions, 1402 flow. Second operand 6 states and 865 transitions. [2022-01-19 08:04:54,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 264 transitions, 1905 flow [2022-01-19 08:04:54,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 264 transitions, 1777 flow, removed 38 selfloop flow, removed 3 redundant places. [2022-01-19 08:04:54,954 INFO L242 Difference]: Finished difference. Result has 209 places, 237 transitions, 1343 flow [2022-01-19 08:04:54,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1343, PETRI_PLACES=209, PETRI_TRANSITIONS=237} [2022-01-19 08:04:54,955 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 61 predicate places. [2022-01-19 08:04:54,955 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 237 transitions, 1343 flow [2022-01-19 08:04:54,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:54,956 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:54,956 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:54,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-19 08:04:54,956 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:54,957 INFO L85 PathProgramCache]: Analyzing trace with hash -552919854, now seen corresponding path program 3 times [2022-01-19 08:04:54,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:54,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188605737] [2022-01-19 08:04:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:54,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:55,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188605737] [2022-01-19 08:04:55,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188605737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067847777] [2022-01-19 08:04:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:04:55,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:55,022 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) [2022-01-19 08:04:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-19 08:04:55,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:04:55,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:04:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:04:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:55,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067847777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:55,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:55,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 08:04:55,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063475899] [2022-01-19 08:04:55,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:55,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:04:55,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:04:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:04:55,451 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:55,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 237 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:55,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:55,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:55,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:55,679 INFO L129 PetriNetUnfolder]: 268/907 cut-off events. [2022-01-19 08:04:55,679 INFO L130 PetriNetUnfolder]: For 2753/2753 co-relation queries the response was YES. [2022-01-19 08:04:55,683 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2870 conditions, 907 events. 268/907 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5293 event pairs, 78 based on Foata normal form. 5/901 useless extension candidates. Maximal degree in co-relation 2767. Up to 182 conditions per place. [2022-01-19 08:04:55,687 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 108 selfloop transitions, 55 changer transitions 1/288 dead transitions. [2022-01-19 08:04:55,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 1966 flow [2022-01-19 08:04:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 08:04:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 08:04:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1307 transitions. [2022-01-19 08:04:55,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8801346801346801 [2022-01-19 08:04:55,738 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1307 transitions. [2022-01-19 08:04:55,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1307 transitions. [2022-01-19 08:04:55,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:55,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1307 transitions. [2022-01-19 08:04:55,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.22222222222223) internal successors, (1307), 9 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:55,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:55,744 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:55,744 INFO L186 Difference]: Start difference. First operand has 209 places, 237 transitions, 1343 flow. Second operand 9 states and 1307 transitions. [2022-01-19 08:04:55,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 1966 flow [2022-01-19 08:04:55,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 288 transitions, 1938 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-01-19 08:04:55,760 INFO L242 Difference]: Finished difference. Result has 217 places, 249 transitions, 1610 flow [2022-01-19 08:04:55,761 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=217, PETRI_TRANSITIONS=249} [2022-01-19 08:04:55,761 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 69 predicate places. [2022-01-19 08:04:55,761 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 249 transitions, 1610 flow [2022-01-19 08:04:55,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:55,762 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:55,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:55,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:55,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:55,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1815906442, now seen corresponding path program 3 times [2022-01-19 08:04:55,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:55,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963133902] [2022-01-19 08:04:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:55,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:56,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963133902] [2022-01-19 08:04:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963133902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516489383] [2022-01-19 08:04:56,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:04:56,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:56,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:56,065 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) [2022-01-19 08:04:56,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-19 08:04:56,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:04:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:04:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 08:04:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:56,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:56,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516489383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:56,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:56,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-19 08:04:56,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993769352] [2022-01-19 08:04:56,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:56,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-19 08:04:56,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-19 08:04:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-19 08:04:56,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:56,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 249 transitions, 1610 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:56,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:56,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:56,862 INFO L129 PetriNetUnfolder]: 306/1052 cut-off events. [2022-01-19 08:04:56,863 INFO L130 PetriNetUnfolder]: For 4008/4008 co-relation queries the response was YES. [2022-01-19 08:04:56,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3447 conditions, 1052 events. 306/1052 cut-off events. For 4008/4008 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6595 event pairs, 40 based on Foata normal form. 6/1048 useless extension candidates. Maximal degree in co-relation 3343. Up to 139 conditions per place. [2022-01-19 08:04:56,872 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 109 selfloop transitions, 80 changer transitions 2/315 dead transitions. [2022-01-19 08:04:56,873 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 2365 flow [2022-01-19 08:04:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-19 08:04:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-01-19 08:04:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1877 transitions. [2022-01-19 08:04:56,876 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875058275058275 [2022-01-19 08:04:56,877 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1877 transitions. [2022-01-19 08:04:56,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1877 transitions. [2022-01-19 08:04:56,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:56,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1877 transitions. [2022-01-19 08:04:56,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 144.3846153846154) internal successors, (1877), 13 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,884 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,884 INFO L186 Difference]: Start difference. First operand has 217 places, 249 transitions, 1610 flow. Second operand 13 states and 1877 transitions. [2022-01-19 08:04:56,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 2365 flow [2022-01-19 08:04:56,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 315 transitions, 2202 flow, removed 25 selfloop flow, removed 6 redundant places. [2022-01-19 08:04:56,903 INFO L242 Difference]: Finished difference. Result has 225 places, 259 transitions, 1736 flow [2022-01-19 08:04:56,903 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1736, PETRI_PLACES=225, PETRI_TRANSITIONS=259} [2022-01-19 08:04:56,904 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 77 predicate places. [2022-01-19 08:04:56,904 INFO L470 AbstractCegarLoop]: Abstraction has has 225 places, 259 transitions, 1736 flow [2022-01-19 08:04:56,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:56,904 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:56,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:56,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-19 08:04:57,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:57,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1175586544, now seen corresponding path program 4 times [2022-01-19 08:04:57,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:57,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589721050] [2022-01-19 08:04:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:57,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:57,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:57,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589721050] [2022-01-19 08:04:57,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589721050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:57,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:57,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:57,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759779457] [2022-01-19 08:04:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:57,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:57,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:57,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:57,178 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:57,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 259 transitions, 1736 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:57,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:57,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:57,361 INFO L129 PetriNetUnfolder]: 295/971 cut-off events. [2022-01-19 08:04:57,362 INFO L130 PetriNetUnfolder]: For 3657/3661 co-relation queries the response was YES. [2022-01-19 08:04:57,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 971 events. 295/971 cut-off events. For 3657/3661 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5764 event pairs, 94 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 3157. Up to 371 conditions per place. [2022-01-19 08:04:57,371 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 129 selfloop transitions, 29 changer transitions 9/291 dead transitions. [2022-01-19 08:04:57,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 291 transitions, 2330 flow [2022-01-19 08:04:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:04:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:04:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-01-19 08:04:57,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2022-01-19 08:04:57,374 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-01-19 08:04:57,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-01-19 08:04:57,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:57,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-01-19 08:04:57,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,379 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,379 INFO L186 Difference]: Start difference. First operand has 225 places, 259 transitions, 1736 flow. Second operand 6 states and 876 transitions. [2022-01-19 08:04:57,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 291 transitions, 2330 flow [2022-01-19 08:04:57,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 291 transitions, 2315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-19 08:04:57,400 INFO L242 Difference]: Finished difference. Result has 230 places, 259 transitions, 1794 flow [2022-01-19 08:04:57,400 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1794, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2022-01-19 08:04:57,401 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 82 predicate places. [2022-01-19 08:04:57,401 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 1794 flow [2022-01-19 08:04:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,401 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:57,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:57,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-19 08:04:57,402 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:57,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1649527968, now seen corresponding path program 4 times [2022-01-19 08:04:57,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:57,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450710558] [2022-01-19 08:04:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:57,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:57,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450710558] [2022-01-19 08:04:57,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450710558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:57,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:57,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-19 08:04:57,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835487714] [2022-01-19 08:04:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 08:04:57,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 08:04:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-19 08:04:57,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:57,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 1794 flow. Second operand has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:57,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:57,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:57,708 INFO L129 PetriNetUnfolder]: 315/1013 cut-off events. [2022-01-19 08:04:57,708 INFO L130 PetriNetUnfolder]: For 3875/3875 co-relation queries the response was YES. [2022-01-19 08:04:57,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1013 events. 315/1013 cut-off events. For 3875/3875 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6061 event pairs, 89 based on Foata normal form. 5/1009 useless extension candidates. Maximal degree in co-relation 3360. Up to 271 conditions per place. [2022-01-19 08:04:57,717 INFO L132 encePairwiseOnDemand]: 158/165 looper letters, 126 selfloop transitions, 44 changer transitions 3/297 dead transitions. [2022-01-19 08:04:57,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 297 transitions, 2404 flow [2022-01-19 08:04:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 08:04:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 08:04:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 883 transitions. [2022-01-19 08:04:57,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8919191919191919 [2022-01-19 08:04:57,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 883 transitions. [2022-01-19 08:04:57,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 883 transitions. [2022-01-19 08:04:57,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:57,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 883 transitions. [2022-01-19 08:04:57,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,722 INFO L186 Difference]: Start difference. First operand has 230 places, 259 transitions, 1794 flow. Second operand 6 states and 883 transitions. [2022-01-19 08:04:57,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 297 transitions, 2404 flow [2022-01-19 08:04:57,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 297 transitions, 2308 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-01-19 08:04:57,741 INFO L242 Difference]: Finished difference. Result has 228 places, 264 transitions, 1902 flow [2022-01-19 08:04:57,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1902, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2022-01-19 08:04:57,742 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 80 predicate places. [2022-01-19 08:04:57,742 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 1902 flow [2022-01-19 08:04:57,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 139.33333333333334) internal successors, (836), 6 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,743 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:57,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:57,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-19 08:04:57,743 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1931931080, now seen corresponding path program 5 times [2022-01-19 08:04:57,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797881834] [2022-01-19 08:04:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:57,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 08:04:57,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:57,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797881834] [2022-01-19 08:04:57,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797881834] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 08:04:57,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 08:04:57,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 08:04:57,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316818956] [2022-01-19 08:04:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 08:04:57,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 08:04:57,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:57,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 08:04:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-19 08:04:57,796 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-01-19 08:04:57,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 1902 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:57,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:57,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-01-19 08:04:57,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:57,983 INFO L129 PetriNetUnfolder]: 304/936 cut-off events. [2022-01-19 08:04:57,984 INFO L130 PetriNetUnfolder]: For 3754/3754 co-relation queries the response was YES. [2022-01-19 08:04:57,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 936 events. 304/936 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5261 event pairs, 105 based on Foata normal form. 3/926 useless extension candidates. Maximal degree in co-relation 3205. Up to 340 conditions per place. [2022-01-19 08:04:57,994 INFO L132 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 34 changer transitions 8/282 dead transitions. [2022-01-19 08:04:57,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 282 transitions, 2349 flow [2022-01-19 08:04:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 08:04:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 08:04:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2022-01-19 08:04:57,998 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8860606060606061 [2022-01-19 08:04:57,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2022-01-19 08:04:57,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2022-01-19 08:04:57,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:57,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2022-01-19 08:04:58,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:58,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:58,004 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:58,004 INFO L186 Difference]: Start difference. First operand has 228 places, 264 transitions, 1902 flow. Second operand 5 states and 731 transitions. [2022-01-19 08:04:58,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 282 transitions, 2349 flow [2022-01-19 08:04:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 282 transitions, 2282 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-01-19 08:04:58,024 INFO L242 Difference]: Finished difference. Result has 231 places, 262 transitions, 1867 flow [2022-01-19 08:04:58,025 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1867, PETRI_PLACES=231, PETRI_TRANSITIONS=262} [2022-01-19 08:04:58,025 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 83 predicate places. [2022-01-19 08:04:58,025 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 262 transitions, 1867 flow [2022-01-19 08:04:58,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:58,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:58,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:58,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-19 08:04:58,026 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:04:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:04:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1878094116, now seen corresponding path program 1 times [2022-01-19 08:04:58,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:04:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850193503] [2022-01-19 08:04:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:58,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:04:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:58,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:04:58,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850193503] [2022-01-19 08:04:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850193503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:04:58,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907169957] [2022-01-19 08:04:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:04:58,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:04:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:04:58,237 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) [2022-01-19 08:04:58,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-19 08:04:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:04:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 08:04:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:04:58,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-19 08:04:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:58,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:04:58,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-01-19 08:04:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:04:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907169957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:04:59,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:04:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-01-19 08:04:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059913582] [2022-01-19 08:04:59,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:04:59,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:04:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:04:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:04:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:04:59,028 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-01-19 08:04:59,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 262 transitions, 1867 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:59,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:04:59,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-01-19 08:04:59,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:04:59,787 INFO L129 PetriNetUnfolder]: 779/2818 cut-off events. [2022-01-19 08:04:59,787 INFO L130 PetriNetUnfolder]: For 9441/9639 co-relation queries the response was YES. [2022-01-19 08:04:59,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2818 events. 779/2818 cut-off events. For 9441/9639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23922 event pairs, 94 based on Foata normal form. 46/2799 useless extension candidates. Maximal degree in co-relation 8693. Up to 474 conditions per place. [2022-01-19 08:04:59,819 INFO L132 encePairwiseOnDemand]: 144/165 looper letters, 100 selfloop transitions, 33 changer transitions 10/342 dead transitions. [2022-01-19 08:04:59,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 342 transitions, 2370 flow [2022-01-19 08:04:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 08:04:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 08:04:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2141 transitions. [2022-01-19 08:04:59,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5898071625344352 [2022-01-19 08:04:59,823 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2141 transitions. [2022-01-19 08:04:59,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2141 transitions. [2022-01-19 08:04:59,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:04:59,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2141 transitions. [2022-01-19 08:04:59,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.31818181818181) internal successors, (2141), 22 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:59,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:59,834 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:59,834 INFO L186 Difference]: Start difference. First operand has 231 places, 262 transitions, 1867 flow. Second operand 22 states and 2141 transitions. [2022-01-19 08:04:59,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 342 transitions, 2370 flow [2022-01-19 08:04:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 2141 flow, removed 8 selfloop flow, removed 17 redundant places. [2022-01-19 08:04:59,877 INFO L242 Difference]: Finished difference. Result has 242 places, 283 transitions, 1858 flow [2022-01-19 08:04:59,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1858, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2022-01-19 08:04:59,878 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 94 predicate places. [2022-01-19 08:04:59,878 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 1858 flow [2022-01-19 08:04:59,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:04:59,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:04:59,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:04:59,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-19 08:05:00,103 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,SelfDestructingSolverStorable14 [2022-01-19 08:05:00,103 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1958640954, now seen corresponding path program 2 times [2022-01-19 08:05:00,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876932849] [2022-01-19 08:05:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:00,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:05:00,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876932849] [2022-01-19 08:05:00,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876932849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:00,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437795794] [2022-01-19 08:05:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:05:00,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:00,272 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) [2022-01-19 08:05:00,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-19 08:05:00,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:05:00,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 08:05:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:00,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-19 08:05:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:05:00,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:00,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2022-01-19 08:05:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 08:05:00,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437795794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:00,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:00,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-01-19 08:05:00,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251003515] [2022-01-19 08:05:00,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:00,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-19 08:05:00,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-19 08:05:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-19 08:05:00,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-01-19 08:05:00,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 1858 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:00,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:00,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-01-19 08:05:00,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:02,458 INFO L129 PetriNetUnfolder]: 2049/7109 cut-off events. [2022-01-19 08:05:02,458 INFO L130 PetriNetUnfolder]: For 17713/18335 co-relation queries the response was YES. [2022-01-19 08:05:02,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23040 conditions, 7109 events. 2049/7109 cut-off events. For 17713/18335 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 73448 event pairs, 182 based on Foata normal form. 156/7144 useless extension candidates. Maximal degree in co-relation 22948. Up to 1105 conditions per place. [2022-01-19 08:05:02,528 INFO L132 encePairwiseOnDemand]: 147/165 looper letters, 103 selfloop transitions, 40 changer transitions 14/356 dead transitions. [2022-01-19 08:05:02,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 356 transitions, 2518 flow [2022-01-19 08:05:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 08:05:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 08:05:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1935 transitions. [2022-01-19 08:05:02,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2022-01-19 08:05:02,532 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1935 transitions. [2022-01-19 08:05:02,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1935 transitions. [2022-01-19 08:05:02,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:02,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1935 transitions. [2022-01-19 08:05:02,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.75) internal successors, (1935), 20 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:02,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:02,540 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:02,540 INFO L186 Difference]: Start difference. First operand has 242 places, 283 transitions, 1858 flow. Second operand 20 states and 1935 transitions. [2022-01-19 08:05:02,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 356 transitions, 2518 flow [2022-01-19 08:05:02,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 356 transitions, 2428 flow, removed 43 selfloop flow, removed 6 redundant places. [2022-01-19 08:05:02,757 INFO L242 Difference]: Finished difference. Result has 262 places, 306 transitions, 2113 flow [2022-01-19 08:05:02,758 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2113, PETRI_PLACES=262, PETRI_TRANSITIONS=306} [2022-01-19 08:05:02,758 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 114 predicate places. [2022-01-19 08:05:02,758 INFO L470 AbstractCegarLoop]: Abstraction has has 262 places, 306 transitions, 2113 flow [2022-01-19 08:05:02,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:02,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:02,759 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:02,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-19 08:05:02,975 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,SelfDestructingSolverStorable15 [2022-01-19 08:05:02,975 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 440836057, now seen corresponding path program 3 times [2022-01-19 08:05:02,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:02,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278124299] [2022-01-19 08:05:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:02,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:05:03,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278124299] [2022-01-19 08:05:03,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278124299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258730757] [2022-01-19 08:05:03,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:05:03,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:03,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:03,424 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) [2022-01-19 08:05:03,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-19 08:05:03,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:05:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:03,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-19 08:05:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:04,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-19 08:05:04,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-19 08:05:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 08:05:04,969 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-01-19 08:05:04,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2022-01-19 08:05:04,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-19 08:05:05,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-19 08:05:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:05:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:05,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_418) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2022-01-19 08:05:06,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:05:06,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 97 [2022-01-19 08:05:06,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:05:06,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 326 [2022-01-19 08:05:06,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:05:06,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 307 treesize of output 283 [2022-01-19 08:05:06,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:05:06,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 110 [2022-01-19 08:05:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 08:05:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258730757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:08,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:08,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-01-19 08:05:08,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956900849] [2022-01-19 08:05:08,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:08,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-19 08:05:08,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-19 08:05:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2266, Unknown=16, NotChecked=98, Total=2652 [2022-01-19 08:05:08,105 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2022-01-19 08:05:08,108 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 2113 flow. Second operand has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:08,108 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:08,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2022-01-19 08:05:08,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:13,449 INFO L129 PetriNetUnfolder]: 2040/7243 cut-off events. [2022-01-19 08:05:13,450 INFO L130 PetriNetUnfolder]: For 19309/20143 co-relation queries the response was YES. [2022-01-19 08:05:13,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 7243 events. 2040/7243 cut-off events. For 19309/20143 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 77345 event pairs, 230 based on Foata normal form. 211/7321 useless extension candidates. Maximal degree in co-relation 23672. Up to 1351 conditions per place. [2022-01-19 08:05:13,523 INFO L132 encePairwiseOnDemand]: 132/165 looper letters, 118 selfloop transitions, 69 changer transitions 4/373 dead transitions. [2022-01-19 08:05:13,524 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 373 transitions, 2829 flow [2022-01-19 08:05:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-19 08:05:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-01-19 08:05:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2584 transitions. [2022-01-19 08:05:13,527 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4474458874458874 [2022-01-19 08:05:13,527 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2584 transitions. [2022-01-19 08:05:13,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2584 transitions. [2022-01-19 08:05:13,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:13,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2584 transitions. [2022-01-19 08:05:13,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.82857142857142) internal successors, (2584), 35 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:13,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:13,539 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 165.0) internal successors, (5940), 36 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:13,539 INFO L186 Difference]: Start difference. First operand has 262 places, 306 transitions, 2113 flow. Second operand 35 states and 2584 transitions. [2022-01-19 08:05:13,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 373 transitions, 2829 flow [2022-01-19 08:05:13,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 373 transitions, 2759 flow, removed 22 selfloop flow, removed 11 redundant places. [2022-01-19 08:05:13,661 INFO L242 Difference]: Finished difference. Result has 289 places, 344 transitions, 2525 flow [2022-01-19 08:05:13,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2525, PETRI_PLACES=289, PETRI_TRANSITIONS=344} [2022-01-19 08:05:13,662 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 141 predicate places. [2022-01-19 08:05:13,662 INFO L470 AbstractCegarLoop]: Abstraction has has 289 places, 344 transitions, 2525 flow [2022-01-19 08:05:13,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.78846153846153) internal successors, (3837), 52 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:13,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:13,663 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:13,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-19 08:05:13,886 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,SelfDestructingSolverStorable16 [2022-01-19 08:05:13,887 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash 488371445, now seen corresponding path program 4 times [2022-01-19 08:05:13,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700426644] [2022-01-19 08:05:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:13,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:14,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700426644] [2022-01-19 08:05:14,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700426644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040141522] [2022-01-19 08:05:14,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:05:14,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:14,008 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) [2022-01-19 08:05:14,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-19 08:05:14,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:05:14,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:05:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 08:05:14,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040141522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:14,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:14,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:05:14,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866511658] [2022-01-19 08:05:14,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:14,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:05:14,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:05:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:05:14,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:05:14,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 344 transitions, 2525 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:14,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:14,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:05:14,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:18,445 INFO L129 PetriNetUnfolder]: 6961/18071 cut-off events. [2022-01-19 08:05:18,446 INFO L130 PetriNetUnfolder]: For 56372/57186 co-relation queries the response was YES. [2022-01-19 08:05:18,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67113 conditions, 18071 events. 6961/18071 cut-off events. For 56372/57186 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 191900 event pairs, 1163 based on Foata normal form. 144/18072 useless extension candidates. Maximal degree in co-relation 66922. Up to 4138 conditions per place. [2022-01-19 08:05:18,619 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 686 selfloop transitions, 206 changer transitions 0/1043 dead transitions. [2022-01-19 08:05:18,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1043 transitions, 10355 flow [2022-01-19 08:05:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-19 08:05:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-01-19 08:05:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7023 transitions. [2022-01-19 08:05:18,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512727272727273 [2022-01-19 08:05:18,631 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7023 transitions. [2022-01-19 08:05:18,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7023 transitions. [2022-01-19 08:05:18,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:18,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7023 transitions. [2022-01-19 08:05:18,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.46) internal successors, (7023), 50 states have internal predecessors, (7023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:18,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:18,658 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:18,658 INFO L186 Difference]: Start difference. First operand has 289 places, 344 transitions, 2525 flow. Second operand 50 states and 7023 transitions. [2022-01-19 08:05:18,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1043 transitions, 10355 flow [2022-01-19 08:05:19,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1043 transitions, 10247 flow, removed 31 selfloop flow, removed 19 redundant places. [2022-01-19 08:05:19,071 INFO L242 Difference]: Finished difference. Result has 334 places, 521 transitions, 4288 flow [2022-01-19 08:05:19,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4288, PETRI_PLACES=334, PETRI_TRANSITIONS=521} [2022-01-19 08:05:19,072 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 186 predicate places. [2022-01-19 08:05:19,072 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 521 transitions, 4288 flow [2022-01-19 08:05:19,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:19,073 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:19,074 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:19,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-19 08:05:19,287 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,SelfDestructingSolverStorable17 [2022-01-19 08:05:19,287 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1652934215, now seen corresponding path program 5 times [2022-01-19 08:05:19,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:19,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500925131] [2022-01-19 08:05:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:19,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:19,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500925131] [2022-01-19 08:05:19,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500925131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227401308] [2022-01-19 08:05:19,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:05:19,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:19,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:19,392 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) [2022-01-19 08:05:19,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-19 08:05:19,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:05:19,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:19,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:05:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:19,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:20,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227401308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:20,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:20,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:05:20,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017957068] [2022-01-19 08:05:20,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:20,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:05:20,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:05:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:05:20,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:05:20,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 521 transitions, 4288 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:20,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:20,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:05:20,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:25,487 INFO L129 PetriNetUnfolder]: 9379/24427 cut-off events. [2022-01-19 08:05:25,488 INFO L130 PetriNetUnfolder]: For 118641/119688 co-relation queries the response was YES. [2022-01-19 08:05:25,770 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110731 conditions, 24427 events. 9379/24427 cut-off events. For 118641/119688 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 273536 event pairs, 1010 based on Foata normal form. 114/24386 useless extension candidates. Maximal degree in co-relation 105186. Up to 4140 conditions per place. [2022-01-19 08:05:25,890 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 771 selfloop transitions, 330 changer transitions 0/1252 dead transitions. [2022-01-19 08:05:25,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1252 transitions, 13360 flow [2022-01-19 08:05:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 08:05:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 08:05:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7444 transitions. [2022-01-19 08:05:25,909 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8512292738707833 [2022-01-19 08:05:25,910 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7444 transitions. [2022-01-19 08:05:25,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7444 transitions. [2022-01-19 08:05:25,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:25,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7444 transitions. [2022-01-19 08:05:25,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 140.45283018867926) internal successors, (7444), 53 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:25,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:25,939 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:25,939 INFO L186 Difference]: Start difference. First operand has 334 places, 521 transitions, 4288 flow. Second operand 53 states and 7444 transitions. [2022-01-19 08:05:25,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1252 transitions, 13360 flow [2022-01-19 08:05:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1252 transitions, 13316 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-01-19 08:05:27,270 INFO L242 Difference]: Finished difference. Result has 402 places, 667 transitions, 6484 flow [2022-01-19 08:05:27,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=6484, PETRI_PLACES=402, PETRI_TRANSITIONS=667} [2022-01-19 08:05:27,271 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 254 predicate places. [2022-01-19 08:05:27,271 INFO L470 AbstractCegarLoop]: Abstraction has has 402 places, 667 transitions, 6484 flow [2022-01-19 08:05:27,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:27,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:27,272 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:27,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-19 08:05:27,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:27,495 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2059831979, now seen corresponding path program 6 times [2022-01-19 08:05:27,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656864242] [2022-01-19 08:05:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:27,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:27,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656864242] [2022-01-19 08:05:27,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656864242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232721886] [2022-01-19 08:05:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:05:27,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:27,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:05:27,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-19 08:05:27,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:05:27,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:05:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:28,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232721886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:28,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:28,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:05:28,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714470580] [2022-01-19 08:05:28,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:28,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:05:28,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:05:28,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:05:28,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:05:28,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 667 transitions, 6484 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:28,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:28,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:05:28,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:34,119 INFO L129 PetriNetUnfolder]: 9406/25693 cut-off events. [2022-01-19 08:05:34,119 INFO L130 PetriNetUnfolder]: For 202710/203851 co-relation queries the response was YES. [2022-01-19 08:05:34,315 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134689 conditions, 25693 events. 9406/25693 cut-off events. For 202710/203851 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 298880 event pairs, 2067 based on Foata normal form. 65/25508 useless extension candidates. Maximal degree in co-relation 128720. Up to 13999 conditions per place. [2022-01-19 08:05:34,396 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 574 selfloop transitions, 159 changer transitions 10/894 dead transitions. [2022-01-19 08:05:34,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 894 transitions, 10166 flow [2022-01-19 08:05:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-19 08:05:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-01-19 08:05:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2022-01-19 08:05:34,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2022-01-19 08:05:34,401 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2022-01-19 08:05:34,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2022-01-19 08:05:34,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:34,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2022-01-19 08:05:34,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:34,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:34,409 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:34,409 INFO L186 Difference]: Start difference. First operand has 402 places, 667 transitions, 6484 flow. Second operand 24 states and 3343 transitions. [2022-01-19 08:05:34,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 894 transitions, 10166 flow [2022-01-19 08:05:36,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 894 transitions, 10024 flow, removed 47 selfloop flow, removed 5 redundant places. [2022-01-19 08:05:36,986 INFO L242 Difference]: Finished difference. Result has 430 places, 712 transitions, 7280 flow [2022-01-19 08:05:36,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7280, PETRI_PLACES=430, PETRI_TRANSITIONS=712} [2022-01-19 08:05:36,987 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 282 predicate places. [2022-01-19 08:05:36,988 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 712 transitions, 7280 flow [2022-01-19 08:05:36,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:36,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:36,988 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:37,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-19 08:05:37,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-01-19 08:05:37,189 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:37,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1726535893, now seen corresponding path program 7 times [2022-01-19 08:05:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:37,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831986731] [2022-01-19 08:05:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:37,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:37,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831986731] [2022-01-19 08:05:37,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831986731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:37,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274329331] [2022-01-19 08:05:37,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:05:37,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:37,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:05:37,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-19 08:05:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:05:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:37,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274329331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:37,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:37,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:05:37,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102727353] [2022-01-19 08:05:37,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:05:37,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:05:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:05:37,885 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:05:37,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 712 transitions, 7280 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:37,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:37,887 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:05:37,887 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:44,483 INFO L129 PetriNetUnfolder]: 9419/26427 cut-off events. [2022-01-19 08:05:44,483 INFO L130 PetriNetUnfolder]: For 202604/203788 co-relation queries the response was YES. [2022-01-19 08:05:45,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 139978 conditions, 26427 events. 9419/26427 cut-off events. For 202604/203788 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 312704 event pairs, 1570 based on Foata normal form. 83/26297 useless extension candidates. Maximal degree in co-relation 137879. Up to 9750 conditions per place. [2022-01-19 08:05:45,202 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 843 selfloop transitions, 257 changer transitions 3/1254 dead transitions. [2022-01-19 08:05:45,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1254 transitions, 14920 flow [2022-01-19 08:05:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-19 08:05:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-01-19 08:05:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 6734 transitions. [2022-01-19 08:05:45,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8502525252525253 [2022-01-19 08:05:45,208 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 6734 transitions. [2022-01-19 08:05:45,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 6734 transitions. [2022-01-19 08:05:45,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:05:45,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 6734 transitions. [2022-01-19 08:05:45,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 140.29166666666666) internal successors, (6734), 48 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:45,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:45,228 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 165.0) internal successors, (8085), 49 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:45,228 INFO L186 Difference]: Start difference. First operand has 430 places, 712 transitions, 7280 flow. Second operand 48 states and 6734 transitions. [2022-01-19 08:05:45,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1254 transitions, 14920 flow [2022-01-19 08:05:48,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 1254 transitions, 14757 flow, removed 65 selfloop flow, removed 3 redundant places. [2022-01-19 08:05:48,730 INFO L242 Difference]: Finished difference. Result has 482 places, 750 transitions, 8342 flow [2022-01-19 08:05:48,731 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=8342, PETRI_PLACES=482, PETRI_TRANSITIONS=750} [2022-01-19 08:05:48,731 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 334 predicate places. [2022-01-19 08:05:48,731 INFO L470 AbstractCegarLoop]: Abstraction has has 482 places, 750 transitions, 8342 flow [2022-01-19 08:05:48,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:48,732 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:05:48,732 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:05:48,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-19 08:05:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:48,947 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:05:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:05:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1188778877, now seen corresponding path program 8 times [2022-01-19 08:05:48,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:05:48,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686800134] [2022-01-19 08:05:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:05:48,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:05:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:05:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:49,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:05:49,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686800134] [2022-01-19 08:05:49,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686800134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:05:49,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315417910] [2022-01-19 08:05:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:05:49,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:05:49,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:05:49,037 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:05:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-19 08:05:49,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:05:49,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:05:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:05:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:05:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:05:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:05:49,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315417910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:05:49,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:05:49,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:05:49,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891983564] [2022-01-19 08:05:49,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:05:49,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:05:49,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:05:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:05:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:05:49,612 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:05:49,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 750 transitions, 8342 flow. Second operand has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:05:49,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:05:49,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:05:49,613 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:05:59,641 INFO L129 PetriNetUnfolder]: 11603/32427 cut-off events. [2022-01-19 08:05:59,642 INFO L130 PetriNetUnfolder]: For 257886/259284 co-relation queries the response was YES. [2022-01-19 08:06:00,424 INFO L84 FinitePrefix]: Finished finitePrefix Result has 178640 conditions, 32427 events. 11603/32427 cut-off events. For 257886/259284 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 392860 event pairs, 1871 based on Foata normal form. 95/32274 useless extension candidates. Maximal degree in co-relation 177851. Up to 12821 conditions per place. [2022-01-19 08:06:00,539 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 981 selfloop transitions, 309 changer transitions 14/1455 dead transitions. [2022-01-19 08:06:00,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1455 transitions, 18136 flow [2022-01-19 08:06:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-19 08:06:00,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-01-19 08:06:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 8402 transitions. [2022-01-19 08:06:00,546 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8486868686868687 [2022-01-19 08:06:00,546 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 8402 transitions. [2022-01-19 08:06:00,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 8402 transitions. [2022-01-19 08:06:00,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:06:00,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 8402 transitions. [2022-01-19 08:06:00,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 140.03333333333333) internal successors, (8402), 60 states have internal predecessors, (8402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:00,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 165.0) internal successors, (10065), 61 states have internal predecessors, (10065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:00,565 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 165.0) internal successors, (10065), 61 states have internal predecessors, (10065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:00,565 INFO L186 Difference]: Start difference. First operand has 482 places, 750 transitions, 8342 flow. Second operand 60 states and 8402 transitions. [2022-01-19 08:06:00,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1455 transitions, 18136 flow [2022-01-19 08:06:06,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1455 transitions, 17548 flow, removed 109 selfloop flow, removed 27 redundant places. [2022-01-19 08:06:06,250 INFO L242 Difference]: Finished difference. Result has 538 places, 845 transitions, 10134 flow [2022-01-19 08:06:06,251 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7865, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=10134, PETRI_PLACES=538, PETRI_TRANSITIONS=845} [2022-01-19 08:06:06,251 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 390 predicate places. [2022-01-19 08:06:06,251 INFO L470 AbstractCegarLoop]: Abstraction has has 538 places, 845 transitions, 10134 flow [2022-01-19 08:06:06,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.38095238095238) internal successors, (2885), 21 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:06,252 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:06:06,252 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:06:06,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-19 08:06:06,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:06,463 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:06:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:06:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1328623497, now seen corresponding path program 9 times [2022-01-19 08:06:06,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:06:06,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612056321] [2022-01-19 08:06:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:06:06,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:06:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:06:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:06,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:06:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612056321] [2022-01-19 08:06:06,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612056321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:06:06,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8386489] [2022-01-19 08:06:06,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:06:06,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:06,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:06:06,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:06:06,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-19 08:06:06,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 08:06:06,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:06:06,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:06:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:06:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:06,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:06:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:07,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8386489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:06:07,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:06:07,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-01-19 08:06:07,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560897391] [2022-01-19 08:06:07,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:06:07,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:06:07,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:06:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:06:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:06:07,142 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:06:07,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 845 transitions, 10134 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:07,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:06:07,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:06:07,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:06:16,984 INFO L129 PetriNetUnfolder]: 11639/33165 cut-off events. [2022-01-19 08:06:16,985 INFO L130 PetriNetUnfolder]: For 287508/288940 co-relation queries the response was YES. [2022-01-19 08:06:17,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189254 conditions, 33165 events. 11639/33165 cut-off events. For 287508/288940 co-relation queries the response was YES. Maximal size of possible extension queue 1434. Compared 408251 event pairs, 1010 based on Foata normal form. 75/33050 useless extension candidates. Maximal degree in co-relation 187576. Up to 5859 conditions per place. [2022-01-19 08:06:17,848 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 824 selfloop transitions, 462 changer transitions 1/1438 dead transitions. [2022-01-19 08:06:17,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1438 transitions, 18772 flow [2022-01-19 08:06:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 08:06:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 08:06:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 7426 transitions. [2022-01-19 08:06:17,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8491709548313322 [2022-01-19 08:06:17,855 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 7426 transitions. [2022-01-19 08:06:17,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 7426 transitions. [2022-01-19 08:06:17,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:06:17,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 7426 transitions. [2022-01-19 08:06:17,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 140.11320754716982) internal successors, (7426), 53 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:17,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:17,876 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:17,876 INFO L186 Difference]: Start difference. First operand has 538 places, 845 transitions, 10134 flow. Second operand 53 states and 7426 transitions. [2022-01-19 08:06:17,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1438 transitions, 18772 flow [2022-01-19 08:06:24,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1438 transitions, 18526 flow, removed 23 selfloop flow, removed 21 redundant places. [2022-01-19 08:06:24,957 INFO L242 Difference]: Finished difference. Result has 578 places, 879 transitions, 11701 flow [2022-01-19 08:06:24,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9908, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11701, PETRI_PLACES=578, PETRI_TRANSITIONS=879} [2022-01-19 08:06:24,959 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 430 predicate places. [2022-01-19 08:06:24,959 INFO L470 AbstractCegarLoop]: Abstraction has has 578 places, 879 transitions, 11701 flow [2022-01-19 08:06:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:24,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:06:24,959 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:06:24,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-19 08:06:25,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-19 08:06:25,173 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:06:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:06:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash -836445719, now seen corresponding path program 10 times [2022-01-19 08:06:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:06:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747205360] [2022-01-19 08:06:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:06:25,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:06:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:06:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:25,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:06:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747205360] [2022-01-19 08:06:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747205360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:06:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543832757] [2022-01-19 08:06:25,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:06:25,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:06:25,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:06:25,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-19 08:06:25,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:06:25,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:06:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:06:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:06:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:25,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:06:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543832757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:06:25,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:06:25,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:06:25,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227432686] [2022-01-19 08:06:25,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:06:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:06:25,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:06:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:06:25,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:06:25,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:06:25,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 879 transitions, 11701 flow. Second operand has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:25,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:06:25,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:06:25,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:06:37,799 INFO L129 PetriNetUnfolder]: 12743/36612 cut-off events. [2022-01-19 08:06:37,799 INFO L130 PetriNetUnfolder]: For 393271/394831 co-relation queries the response was YES. [2022-01-19 08:06:39,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221308 conditions, 36612 events. 12743/36612 cut-off events. For 393271/394831 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 461224 event pairs, 1874 based on Foata normal form. 83/36388 useless extension candidates. Maximal degree in co-relation 220320. Up to 10600 conditions per place. [2022-01-19 08:06:39,208 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 853 selfloop transitions, 426 changer transitions 1/1431 dead transitions. [2022-01-19 08:06:39,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1431 transitions, 20137 flow [2022-01-19 08:06:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-19 08:06:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-01-19 08:06:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5623 transitions. [2022-01-19 08:06:39,213 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8519696969696969 [2022-01-19 08:06:39,213 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5623 transitions. [2022-01-19 08:06:39,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5623 transitions. [2022-01-19 08:06:39,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:06:39,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5623 transitions. [2022-01-19 08:06:39,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 140.575) internal successors, (5623), 40 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:39,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:39,223 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 165.0) internal successors, (6765), 41 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:39,223 INFO L186 Difference]: Start difference. First operand has 578 places, 879 transitions, 11701 flow. Second operand 40 states and 5623 transitions. [2022-01-19 08:06:39,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1431 transitions, 20137 flow [2022-01-19 08:06:52,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1431 transitions, 19635 flow, removed 77 selfloop flow, removed 25 redundant places. [2022-01-19 08:06:52,248 INFO L242 Difference]: Finished difference. Result has 607 places, 944 transitions, 13400 flow [2022-01-19 08:06:52,249 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=11251, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=13400, PETRI_PLACES=607, PETRI_TRANSITIONS=944} [2022-01-19 08:06:52,250 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 459 predicate places. [2022-01-19 08:06:52,250 INFO L470 AbstractCegarLoop]: Abstraction has has 607 places, 944 transitions, 13400 flow [2022-01-19 08:06:52,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:52,250 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:06:52,251 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:06:52,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-19 08:06:52,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:52,468 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:06:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:06:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash 603723001, now seen corresponding path program 11 times [2022-01-19 08:06:52,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:06:52,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740257863] [2022-01-19 08:06:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:06:52,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:06:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:06:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:52,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:06:52,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740257863] [2022-01-19 08:06:52,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740257863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:06:52,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627435074] [2022-01-19 08:06:52,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:06:52,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:06:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:06:52,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:06:52,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-19 08:06:52,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 08:06:52,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:06:52,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:06:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:06:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:52,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:06:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:06:53,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627435074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:06:53,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:06:53,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-19 08:06:53,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636514941] [2022-01-19 08:06:53,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:06:53,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-19 08:06:53,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:06:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-19 08:06:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-19 08:06:53,190 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:06:53,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 944 transitions, 13400 flow. Second operand has 16 states, 16 states have (on average 137.8125) internal successors, (2205), 16 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:06:53,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:06:53,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:06:53,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:05,259 INFO L129 PetriNetUnfolder]: 12784/36749 cut-off events. [2022-01-19 08:07:05,260 INFO L130 PetriNetUnfolder]: For 480164/481755 co-relation queries the response was YES. [2022-01-19 08:07:06,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238026 conditions, 36749 events. 12784/36749 cut-off events. For 480164/481755 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 463589 event pairs, 2209 based on Foata normal form. 57/36508 useless extension candidates. Maximal degree in co-relation 236929. Up to 13439 conditions per place. [2022-01-19 08:07:06,740 INFO L132 encePairwiseOnDemand]: 152/165 looper letters, 785 selfloop transitions, 253 changer transitions 23/1212 dead transitions. [2022-01-19 08:07:06,741 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1212 transitions, 18275 flow [2022-01-19 08:07:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-19 08:07:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-01-19 08:07:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2533 transitions. [2022-01-19 08:07:06,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8528619528619529 [2022-01-19 08:07:06,743 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2533 transitions. [2022-01-19 08:07:06,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2533 transitions. [2022-01-19 08:07:06,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:06,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2533 transitions. [2022-01-19 08:07:06,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 140.72222222222223) internal successors, (2533), 18 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:06,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:06,748 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:06,748 INFO L186 Difference]: Start difference. First operand has 607 places, 944 transitions, 13400 flow. Second operand 18 states and 2533 transitions. [2022-01-19 08:07:06,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1212 transitions, 18275 flow [2022-01-19 08:07:19,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1212 transitions, 18050 flow, removed 39 selfloop flow, removed 15 redundant places. [2022-01-19 08:07:19,085 INFO L242 Difference]: Finished difference. Result has 615 places, 955 transitions, 14078 flow [2022-01-19 08:07:19,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=13209, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14078, PETRI_PLACES=615, PETRI_TRANSITIONS=955} [2022-01-19 08:07:19,086 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 467 predicate places. [2022-01-19 08:07:19,087 INFO L470 AbstractCegarLoop]: Abstraction has has 615 places, 955 transitions, 14078 flow [2022-01-19 08:07:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 137.8125) internal successors, (2205), 16 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:19,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:19,087 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:07:19,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-19 08:07:19,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:19,303 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -707940439, now seen corresponding path program 12 times [2022-01-19 08:07:19,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654299044] [2022-01-19 08:07:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:19,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:19,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:19,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654299044] [2022-01-19 08:07:19,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654299044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407017147] [2022-01-19 08:07:19,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:07:19,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:19,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:19,388 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:07:19,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-19 08:07:19,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:07:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:07:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:19,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407017147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:19,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:19,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-19 08:07:19,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305016906] [2022-01-19 08:07:19,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:19,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-19 08:07:19,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-19 08:07:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-19 08:07:19,973 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:07:19,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 955 transitions, 14078 flow. Second operand has 17 states, 17 states have (on average 137.64705882352942) internal successors, (2340), 17 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:19,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:19,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:07:19,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:32,177 INFO L129 PetriNetUnfolder]: 12765/36677 cut-off events. [2022-01-19 08:07:32,177 INFO L130 PetriNetUnfolder]: For 476254/477840 co-relation queries the response was YES. [2022-01-19 08:07:33,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 242223 conditions, 36677 events. 12765/36677 cut-off events. For 476254/477840 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 462342 event pairs, 1829 based on Foata normal form. 57/36474 useless extension candidates. Maximal degree in co-relation 241910. Up to 13440 conditions per place. [2022-01-19 08:07:33,502 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 869 selfloop transitions, 375 changer transitions 1/1396 dead transitions. [2022-01-19 08:07:33,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1396 transitions, 20990 flow [2022-01-19 08:07:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-19 08:07:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-01-19 08:07:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5470 transitions. [2022-01-19 08:07:33,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85003885003885 [2022-01-19 08:07:33,506 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5470 transitions. [2022-01-19 08:07:33,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5470 transitions. [2022-01-19 08:07:33,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:07:33,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5470 transitions. [2022-01-19 08:07:33,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 140.25641025641025) internal successors, (5470), 39 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:33,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 165.0) internal successors, (6600), 40 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:33,516 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 165.0) internal successors, (6600), 40 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:33,516 INFO L186 Difference]: Start difference. First operand has 615 places, 955 transitions, 14078 flow. Second operand 39 states and 5470 transitions. [2022-01-19 08:07:33,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1396 transitions, 20990 flow [2022-01-19 08:07:46,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1396 transitions, 20592 flow, removed 61 selfloop flow, removed 12 redundant places. [2022-01-19 08:07:46,153 INFO L242 Difference]: Finished difference. Result has 640 places, 963 transitions, 14723 flow [2022-01-19 08:07:46,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=13752, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14723, PETRI_PLACES=640, PETRI_TRANSITIONS=963} [2022-01-19 08:07:46,154 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 492 predicate places. [2022-01-19 08:07:46,154 INFO L470 AbstractCegarLoop]: Abstraction has has 640 places, 963 transitions, 14723 flow [2022-01-19 08:07:46,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.64705882352942) internal successors, (2340), 17 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:46,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:07:46,155 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:07:46,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-19 08:07:46,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:46,363 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:07:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:07:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1496903569, now seen corresponding path program 13 times [2022-01-19 08:07:46,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:07:46,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252545361] [2022-01-19 08:07:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:07:46,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:07:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:46,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:07:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252545361] [2022-01-19 08:07:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252545361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:07:46,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887565368] [2022-01-19 08:07:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 08:07:46,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:07:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:07:46,448 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:07:46,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-19 08:07:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:07:46,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:07:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:07:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:46,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:07:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:07:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887565368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:07:47,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:07:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:07:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987781441] [2022-01-19 08:07:47,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:07:47,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:07:47,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:07:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:07:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:07:47,022 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:07:47,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 963 transitions, 14723 flow. Second operand has 18 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:07:47,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:07:47,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:07:47,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:07:59,904 INFO L129 PetriNetUnfolder]: 12798/37126 cut-off events. [2022-01-19 08:07:59,904 INFO L130 PetriNetUnfolder]: For 470795/472441 co-relation queries the response was YES. [2022-01-19 08:08:01,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244661 conditions, 37126 events. 12798/37126 cut-off events. For 470795/472441 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 472132 event pairs, 2015 based on Foata normal form. 83/36942 useless extension candidates. Maximal degree in co-relation 243389. Up to 13440 conditions per place. [2022-01-19 08:08:01,200 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 797 selfloop transitions, 327 changer transitions 12/1287 dead transitions. [2022-01-19 08:08:01,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1287 transitions, 20236 flow [2022-01-19 08:08:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-19 08:08:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-01-19 08:08:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3650 transitions. [2022-01-19 08:08:01,202 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8508158508158508 [2022-01-19 08:08:01,202 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3650 transitions. [2022-01-19 08:08:01,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3650 transitions. [2022-01-19 08:08:01,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:01,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3650 transitions. [2022-01-19 08:08:01,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 140.3846153846154) internal successors, (3650), 26 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 165.0) internal successors, (4455), 27 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,207 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 165.0) internal successors, (4455), 27 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:01,207 INFO L186 Difference]: Start difference. First operand has 640 places, 963 transitions, 14723 flow. Second operand 26 states and 3650 transitions. [2022-01-19 08:08:01,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1287 transitions, 20236 flow [2022-01-19 08:08:13,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 1287 transitions, 19822 flow, removed 14 selfloop flow, removed 23 redundant places. [2022-01-19 08:08:13,427 INFO L242 Difference]: Finished difference. Result has 646 places, 972 transitions, 15277 flow [2022-01-19 08:08:13,428 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15277, PETRI_PLACES=646, PETRI_TRANSITIONS=972} [2022-01-19 08:08:13,428 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 498 predicate places. [2022-01-19 08:08:13,428 INFO L470 AbstractCegarLoop]: Abstraction has has 646 places, 972 transitions, 15277 flow [2022-01-19 08:08:13,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.61111111111111) internal successors, (2477), 18 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:13,429 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:13,429 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:08:13,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-19 08:08:13,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-19 08:08:13,639 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1428389443, now seen corresponding path program 14 times [2022-01-19 08:08:13,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:13,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78619983] [2022-01-19 08:08:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:13,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:13,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78619983] [2022-01-19 08:08:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78619983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:13,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946929915] [2022-01-19 08:08:13,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 08:08:13,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:13,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:13,742 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:08:13,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-19 08:08:13,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 08:08:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:08:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:14,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946929915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:14,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-19 08:08:14,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426510983] [2022-01-19 08:08:14,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:14,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-19 08:08:14,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-19 08:08:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-19 08:08:14,353 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:08:14,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 972 transitions, 15277 flow. Second operand has 18 states, 18 states have (on average 137.55555555555554) internal successors, (2476), 18 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:14,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:14,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:08:14,354 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:08:26,632 INFO L129 PetriNetUnfolder]: 12682/36686 cut-off events. [2022-01-19 08:08:26,632 INFO L130 PetriNetUnfolder]: For 486798/488412 co-relation queries the response was YES. [2022-01-19 08:08:27,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246068 conditions, 36686 events. 12682/36686 cut-off events. For 486798/488412 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 464605 event pairs, 1834 based on Foata normal form. 84/36518 useless extension candidates. Maximal degree in co-relation 244719. Up to 13434 conditions per place. [2022-01-19 08:08:27,907 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 856 selfloop transitions, 384 changer transitions 10/1401 dead transitions. [2022-01-19 08:08:27,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1401 transitions, 21923 flow [2022-01-19 08:08:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 08:08:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 08:08:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5743 transitions. [2022-01-19 08:08:27,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8489283074648928 [2022-01-19 08:08:27,912 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5743 transitions. [2022-01-19 08:08:27,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5743 transitions. [2022-01-19 08:08:27,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:08:27,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5743 transitions. [2022-01-19 08:08:27,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 140.0731707317073) internal successors, (5743), 41 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:27,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 165.0) internal successors, (6930), 42 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:27,922 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 165.0) internal successors, (6930), 42 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:27,922 INFO L186 Difference]: Start difference. First operand has 646 places, 972 transitions, 15277 flow. Second operand 41 states and 5743 transitions. [2022-01-19 08:08:27,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1401 transitions, 21923 flow [2022-01-19 08:08:40,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1401 transitions, 21513 flow, removed 5 selfloop flow, removed 19 redundant places. [2022-01-19 08:08:40,440 INFO L242 Difference]: Finished difference. Result has 668 places, 973 transitions, 15689 flow [2022-01-19 08:08:40,441 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=14807, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=15689, PETRI_PLACES=668, PETRI_TRANSITIONS=973} [2022-01-19 08:08:40,441 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 520 predicate places. [2022-01-19 08:08:40,441 INFO L470 AbstractCegarLoop]: Abstraction has has 668 places, 973 transitions, 15689 flow [2022-01-19 08:08:40,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.55555555555554) internal successors, (2476), 18 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:40,442 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:08:40,442 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:08:40,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-19 08:08:40,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 08:08:40,646 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:08:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:08:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 733606519, now seen corresponding path program 15 times [2022-01-19 08:08:40,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:08:40,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394519489] [2022-01-19 08:08:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:08:40,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:08:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:08:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:40,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:08:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394519489] [2022-01-19 08:08:40,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394519489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:08:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655704308] [2022-01-19 08:08:40,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 08:08:40,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:08:40,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:08:40,748 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:08:40,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-19 08:08:40,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 08:08:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:08:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 08:08:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:08:41,657 INFO L353 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-01-19 08:08:41,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 21 [2022-01-19 08:08:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:08:41,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 08:08:41,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 70 [2022-01-19 08:08:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:08:42,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655704308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:08:42,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:08:42,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 12] total 31 [2022-01-19 08:08:42,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011938787] [2022-01-19 08:08:42,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:08:42,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-19 08:08:42,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:08:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-19 08:08:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-01-19 08:08:42,591 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 165 [2022-01-19 08:08:42,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 973 transitions, 15689 flow. Second operand has 31 states, 31 states have (on average 72.03225806451613) internal successors, (2233), 31 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:08:42,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:08:42,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 165 [2022-01-19 08:08:42,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:09:06,779 INFO L129 PetriNetUnfolder]: 33869/72542 cut-off events. [2022-01-19 08:09:06,780 INFO L130 PetriNetUnfolder]: For 910348/910387 co-relation queries the response was YES. [2022-01-19 08:09:09,239 INFO L84 FinitePrefix]: Finished finitePrefix Result has 473089 conditions, 72542 events. 33869/72542 cut-off events. For 910348/910387 co-relation queries the response was YES. Maximal size of possible extension queue 3237. Compared 874912 event pairs, 3949 based on Foata normal form. 176/72289 useless extension candidates. Maximal degree in co-relation 470371. Up to 39279 conditions per place. [2022-01-19 08:09:09,720 INFO L132 encePairwiseOnDemand]: 130/165 looper letters, 1119 selfloop transitions, 398 changer transitions 158/1730 dead transitions. [2022-01-19 08:09:09,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 1730 transitions, 29849 flow [2022-01-19 08:09:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-19 08:09:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-01-19 08:09:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4612 transitions. [2022-01-19 08:09:09,723 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43002331002331 [2022-01-19 08:09:09,723 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4612 transitions. [2022-01-19 08:09:09,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4612 transitions. [2022-01-19 08:09:09,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:09:09,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4612 transitions. [2022-01-19 08:09:09,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 70.95384615384616) internal successors, (4612), 65 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:09,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 165.0) internal successors, (10890), 66 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:09,731 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 165.0) internal successors, (10890), 66 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:09,731 INFO L186 Difference]: Start difference. First operand has 668 places, 973 transitions, 15689 flow. Second operand 65 states and 4612 transitions. [2022-01-19 08:09:09,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 1730 transitions, 29849 flow [2022-01-19 08:09:48,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 1730 transitions, 28761 flow, removed 2 selfloop flow, removed 35 redundant places. [2022-01-19 08:09:48,119 INFO L242 Difference]: Finished difference. Result has 727 places, 1106 transitions, 18005 flow [2022-01-19 08:09:48,119 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=15087, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=18005, PETRI_PLACES=727, PETRI_TRANSITIONS=1106} [2022-01-19 08:09:48,120 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 579 predicate places. [2022-01-19 08:09:48,120 INFO L470 AbstractCegarLoop]: Abstraction has has 727 places, 1106 transitions, 18005 flow [2022-01-19 08:09:48,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.03225806451613) internal successors, (2233), 31 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:48,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:09:48,121 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:09:48,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-19 08:09:48,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 08:09:48,327 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:09:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:09:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash 938411575, now seen corresponding path program 16 times [2022-01-19 08:09:48,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:09:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720795563] [2022-01-19 08:09:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:09:48,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:09:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:09:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:09:48,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:09:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720795563] [2022-01-19 08:09:48,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720795563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:09:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720261594] [2022-01-19 08:09:48,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 08:09:48,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:09:48,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:09:48,404 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:09:48,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-19 08:09:48,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 08:09:48,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:09:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:09:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:09:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:09:48,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:09:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-19 08:09:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720261594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:09:48,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:09:48,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:09:48,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662177270] [2022-01-19 08:09:48,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:09:48,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:09:48,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:09:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:09:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:09:48,965 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:09:48,966 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1106 transitions, 18005 flow. Second operand has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:09:48,966 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:09:48,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:09:48,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:06,269 INFO L129 PetriNetUnfolder]: 15350/42805 cut-off events. [2022-01-19 08:10:06,269 INFO L130 PetriNetUnfolder]: For 648461/650453 co-relation queries the response was YES. [2022-01-19 08:10:07,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 299732 conditions, 42805 events. 15350/42805 cut-off events. For 648461/650453 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 538647 event pairs, 2719 based on Foata normal form. 89/42624 useless extension candidates. Maximal degree in co-relation 298510. Up to 16665 conditions per place. [2022-01-19 08:10:08,196 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1175 selfloop transitions, 498 changer transitions 27/1852 dead transitions. [2022-01-19 08:10:08,196 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 1852 transitions, 31612 flow [2022-01-19 08:10:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-19 08:10:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-01-19 08:10:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 8941 transitions. [2022-01-19 08:10:08,209 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.846685606060606 [2022-01-19 08:10:08,210 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 8941 transitions. [2022-01-19 08:10:08,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 8941 transitions. [2022-01-19 08:10:08,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:08,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 8941 transitions. [2022-01-19 08:10:08,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 139.703125) internal successors, (8941), 64 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:08,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:08,228 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 165.0) internal successors, (10725), 65 states have internal predecessors, (10725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:08,228 INFO L186 Difference]: Start difference. First operand has 727 places, 1106 transitions, 18005 flow. Second operand 64 states and 8941 transitions. [2022-01-19 08:10:08,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 1852 transitions, 31612 flow [2022-01-19 08:10:27,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 1852 transitions, 30651 flow, removed 119 selfloop flow, removed 43 redundant places. [2022-01-19 08:10:27,075 INFO L242 Difference]: Finished difference. Result has 750 places, 1355 transitions, 23292 flow [2022-01-19 08:10:27,076 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=17184, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=23292, PETRI_PLACES=750, PETRI_TRANSITIONS=1355} [2022-01-19 08:10:27,076 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 602 predicate places. [2022-01-19 08:10:27,076 INFO L470 AbstractCegarLoop]: Abstraction has has 750 places, 1355 transitions, 23292 flow [2022-01-19 08:10:27,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.52631578947367) internal successors, (2613), 19 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:27,077 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:10:27,077 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:10:27,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-19 08:10:27,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:27,290 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:10:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:10:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash 715572635, now seen corresponding path program 17 times [2022-01-19 08:10:27,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:10:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430906124] [2022-01-19 08:10:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:10:27,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:10:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:10:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:10:27,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:10:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430906124] [2022-01-19 08:10:27,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430906124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:10:27,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825095968] [2022-01-19 08:10:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 08:10:27,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:10:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:10:27,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:10:27,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-19 08:10:27,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-19 08:10:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:10:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:10:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:10:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:10:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:10:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:10:27,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825095968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:10:27,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:10:27,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-01-19 08:10:27,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679459803] [2022-01-19 08:10:27,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:10:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-19 08:10:27,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:10:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-19 08:10:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-19 08:10:27,922 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:10:27,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1355 transitions, 23292 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:27,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:10:27,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:10:27,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 08:10:53,906 INFO L129 PetriNetUnfolder]: 19434/55035 cut-off events. [2022-01-19 08:10:53,907 INFO L130 PetriNetUnfolder]: For 963102/965701 co-relation queries the response was YES. [2022-01-19 08:10:56,691 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397661 conditions, 55035 events. 19434/55035 cut-off events. For 963102/965701 co-relation queries the response was YES. Maximal size of possible extension queue 2341. Compared 722945 event pairs, 2534 based on Foata normal form. 247/54887 useless extension candidates. Maximal degree in co-relation 395599. Up to 12379 conditions per place. [2022-01-19 08:10:56,918 INFO L132 encePairwiseOnDemand]: 153/165 looper letters, 1257 selfloop transitions, 845 changer transitions 18/2272 dead transitions. [2022-01-19 08:10:56,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 810 places, 2272 transitions, 41034 flow [2022-01-19 08:10:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-19 08:10:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-01-19 08:10:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 8843 transitions. [2022-01-19 08:10:56,922 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8506974506974507 [2022-01-19 08:10:56,922 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 8843 transitions. [2022-01-19 08:10:56,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 8843 transitions. [2022-01-19 08:10:56,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 08:10:56,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 8843 transitions. [2022-01-19 08:10:56,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 140.36507936507937) internal successors, (8843), 63 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:56,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:56,937 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 165.0) internal successors, (10560), 64 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:10:56,937 INFO L186 Difference]: Start difference. First operand has 750 places, 1355 transitions, 23292 flow. Second operand 63 states and 8843 transitions. [2022-01-19 08:10:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 810 places, 2272 transitions, 41034 flow [2022-01-19 08:11:36,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2272 transitions, 39910 flow, removed 501 selfloop flow, removed 9 redundant places. [2022-01-19 08:11:36,650 INFO L242 Difference]: Finished difference. Result has 824 places, 1614 transitions, 30119 flow [2022-01-19 08:11:36,651 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=22378, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=30119, PETRI_PLACES=824, PETRI_TRANSITIONS=1614} [2022-01-19 08:11:36,651 INFO L334 CegarLoopForPetriNet]: 148 programPoint places, 676 predicate places. [2022-01-19 08:11:36,651 INFO L470 AbstractCegarLoop]: Abstraction has has 824 places, 1614 transitions, 30119 flow [2022-01-19 08:11:36,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:36,652 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 08:11:36,652 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-19 08:11:36,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-19 08:11:36,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:11:36,853 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 08:11:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 08:11:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash 44498919, now seen corresponding path program 18 times [2022-01-19 08:11:36,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 08:11:36,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739057343] [2022-01-19 08:11:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 08:11:36,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 08:11:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 08:11:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:11:36,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 08:11:36,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739057343] [2022-01-19 08:11:36,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739057343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 08:11:36,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667526630] [2022-01-19 08:11:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 08:11:36,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 08:11:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 08:11:36,932 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 08:11:36,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-19 08:11:37,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 08:11:37,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 08:11:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 08:11:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 08:11:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:11:37,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 08:11:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 08:11:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667526630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 08:11:37,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 08:11:37,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-19 08:11:37,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156881955] [2022-01-19 08:11:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 08:11:37,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-19 08:11:37,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 08:11:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-19 08:11:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-19 08:11:37,509 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-01-19 08:11:37,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 1614 transitions, 30119 flow. Second operand has 21 states, 21 states have (on average 137.42857142857142) internal successors, (2886), 21 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-19 08:11:37,510 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 08:11:37,510 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-01-19 08:11:37,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand