/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/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-19 09:10:39,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-19 09:10:39,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-19 09:10:39,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-19 09:10:39,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-19 09:10:39,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-19 09:10:39,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-19 09:10:39,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-19 09:10:39,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-19 09:10:39,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-19 09:10:39,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-19 09:10:39,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-19 09:10:39,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-19 09:10:39,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-19 09:10:39,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-19 09:10:39,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-19 09:10:39,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-19 09:10:39,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-19 09:10:39,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-19 09:10:39,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-19 09:10:39,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-19 09:10:39,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-19 09:10:39,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-19 09:10:39,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-19 09:10:39,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-19 09:10:39,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-19 09:10:39,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-19 09:10:39,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-19 09:10:39,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-19 09:10:39,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-19 09:10:39,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-19 09:10:39,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-19 09:10:39,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-19 09:10:39,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-19 09:10:39,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-19 09:10:39,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-19 09:10:39,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-19 09:10:39,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-19 09:10:39,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-19 09:10:39,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-19 09:10:39,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-19 09:10:39,491 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 09:10:39,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-19 09:10:39,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-19 09:10:39,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-19 09:10:39,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-19 09:10:39,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-19 09:10:39,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-19 09:10:39,528 INFO L138 SettingsManager]: * Use SBE=true [2022-01-19 09:10:39,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-19 09:10:39,528 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-19 09:10:39,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-19 09:10:39,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-19 09:10:39,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-19 09:10:39,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-19 09:10:39,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-19 09:10:39,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-19 09:10:39,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-19 09:10:39,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:10:39,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-19 09:10:39,531 INFO L138 SettingsManager]: * When to check the insufficient erros location relative to the other error locations=BEFORE [2022-01-19 09:10:39,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-19 09:10:39,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-19 09:10:39,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-19 09:10:39,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-19 09:10:39,794 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-19 09:10:39,794 INFO L275 PluginConnector]: CDTParser initialized [2022-01-19 09:10:39,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2022-01-19 09:10:39,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812578402/4d0433df6844493b8340970f35b95ffa/FLAGe98eea59b [2022-01-19 09:10:40,173 INFO L306 CDTParser]: Found 1 translation units. [2022-01-19 09:10:40,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2022-01-19 09:10:40,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812578402/4d0433df6844493b8340970f35b95ffa/FLAGe98eea59b [2022-01-19 09:10:40,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/812578402/4d0433df6844493b8340970f35b95ffa [2022-01-19 09:10:40,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-19 09:10:40,591 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-19 09:10:40,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-19 09:10:40,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-19 09:10:40,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-19 09:10:40,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729fad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40, skipping insertion in model container [2022-01-19 09:10:40,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-19 09:10:40,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-19 09:10:40,785 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/test-context1.wvr.c[2433,2446] [2022-01-19 09:10:40,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:10:40,801 INFO L203 MainTranslator]: Completed pre-run [2022-01-19 09:10:40,835 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/test-context1.wvr.c[2433,2446] [2022-01-19 09:10:40,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-19 09:10:40,853 INFO L208 MainTranslator]: Completed translation [2022-01-19 09:10:40,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40 WrapperNode [2022-01-19 09:10:40,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-19 09:10:40,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-19 09:10:40,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-19 09:10:40,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-19 09:10:40,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,907 INFO L137 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-01-19 09:10:40,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-19 09:10:40,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-19 09:10:40,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-19 09:10:40,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-19 09:10:40,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-19 09:10:40,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-19 09:10:40,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-19 09:10:40,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-19 09:10:40,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (1/1) ... [2022-01-19 09:10:40,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-19 09:10:40,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:40,984 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 09:10:41,011 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 09:10:41,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-19 09:10:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-19 09:10:41,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-19 09:10:41,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-19 09:10:41,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-19 09:10:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-19 09:10:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-19 09:10:41,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-19 09:10:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-19 09:10:41,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-19 09:10:41,030 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 09:10:41,129 INFO L234 CfgBuilder]: Building ICFG [2022-01-19 09:10:41,130 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-19 09:10:41,340 INFO L275 CfgBuilder]: Performing block encoding [2022-01-19 09:10:41,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-19 09:10:41,402 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-19 09:10:41,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:10:41 BoogieIcfgContainer [2022-01-19 09:10:41,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-19 09:10:41,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-19 09:10:41,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-19 09:10:41,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-19 09:10:41,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.01 09:10:40" (1/3) ... [2022-01-19 09:10:41,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f11fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:10:41, skipping insertion in model container [2022-01-19 09:10:41,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.01 09:10:40" (2/3) ... [2022-01-19 09:10:41,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f11fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.01 09:10:41, skipping insertion in model container [2022-01-19 09:10:41,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.01 09:10:41" (3/3) ... [2022-01-19 09:10:41,417 INFO L111 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-01-19 09:10:41,425 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-19 09:10:41,425 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-19 09:10:41,425 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-19 09:10:41,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,455 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,456 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,457 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,459 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,460 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,461 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,463 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,465 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,466 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,467 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-19 09:10:41,470 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-19 09:10:41,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-19 09:10:41,521 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 09:10:41,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-19 09:10:41,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-01-19 09:10:41,572 INFO L129 PetriNetUnfolder]: 9/114 cut-off events. [2022-01-19 09:10:41,573 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:10:41,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-01-19 09:10:41,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-01-19 09:10:41,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-01-19 09:10:41,602 INFO L129 PetriNetUnfolder]: 9/104 cut-off events. [2022-01-19 09:10:41,602 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-01-19 09:10:41,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:41,603 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] [2022-01-19 09:10:41,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1304387571, now seen corresponding path program 1 times [2022-01-19 09:10:41,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:41,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659894455] [2022-01-19 09:10:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:41,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:41,846 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 09:10:41,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659894455] [2022-01-19 09:10:41,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659894455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:10:41,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:10:41,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-19 09:10:41,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918689275] [2022-01-19 09:10:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:10:41,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-19 09:10:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:41,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-19 09:10:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-19 09:10:41,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-01-19 09:10:41,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 09:10:41,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:41,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-01-19 09:10:41,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:41,976 INFO L129 PetriNetUnfolder]: 5/101 cut-off events. [2022-01-19 09:10:41,976 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-01-19 09:10:41,977 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-01-19 09:10:41,978 INFO L132 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-01-19 09:10:41,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-01-19 09:10:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-19 09:10:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-01-19 09:10:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-01-19 09:10:41,995 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-01-19 09:10:41,995 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-01-19 09:10:41,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-01-19 09:10:41,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:42,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-01-19 09:10:42,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 09:10:42,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 09:10:42,018 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 09:10:42,020 INFO L186 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-01-19 09:10:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-01-19 09:10:42,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-01-19 09:10:42,027 INFO L242 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-01-19 09:10:42,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-01-19 09:10:42,031 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-01-19 09:10:42,032 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-01-19 09:10:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 09:10:42,032 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:42,032 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] [2022-01-19 09:10:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-19 09:10:42,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1861027578, now seen corresponding path program 1 times [2022-01-19 09:10:42,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:42,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720705878] [2022-01-19 09:10:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:42,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:42,240 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 09:10:42,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720705878] [2022-01-19 09:10:42,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720705878] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:10:42,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:10:42,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-19 09:10:42,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543017176] [2022-01-19 09:10:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:10:42,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-19 09:10:42,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-19 09:10:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-19 09:10:42,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:10:42,245 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 09:10:42,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:42,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:10:42,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:42,357 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-01-19 09:10:42,357 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-01-19 09:10:42,360 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-01-19 09:10:42,361 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-01-19 09:10:42,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-01-19 09:10:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 09:10:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 09:10:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-01-19 09:10:42,368 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-01-19 09:10:42,368 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-01-19 09:10:42,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-01-19 09:10:42,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:42,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-01-19 09:10:42,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 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 09:10:42,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 09:10:42,375 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 09:10:42,375 INFO L186 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-01-19 09:10:42,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-01-19 09:10:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-19 09:10:42,379 INFO L242 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-01-19 09:10:42,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-01-19 09:10:42,380 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-01-19 09:10:42,380 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-01-19 09:10:42,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 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 09:10:42,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:42,381 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] [2022-01-19 09:10:42,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-19 09:10:42,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1965846470, now seen corresponding path program 1 times [2022-01-19 09:10:42,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:42,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535839976] [2022-01-19 09:10:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:42,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:42,480 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 09:10:42,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:42,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535839976] [2022-01-19 09:10:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535839976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:10:42,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:10:42,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-19 09:10:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787519798] [2022-01-19 09:10:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:10:42,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-19 09:10:42,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-19 09:10:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-19 09:10:42,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 09:10:42,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 09:10:42,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:42,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 09:10:42,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:42,510 INFO L129 PetriNetUnfolder]: 8/138 cut-off events. [2022-01-19 09:10:42,510 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-01-19 09:10:42,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-01-19 09:10:42,511 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-01-19 09:10:42,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-01-19 09:10:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-19 09:10:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-01-19 09:10:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-01-19 09:10:42,513 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-01-19 09:10:42,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-01-19 09:10:42,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-01-19 09:10:42,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:42,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-01-19 09:10:42,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 09:10:42,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 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 09:10:42,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 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 09:10:42,515 INFO L186 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-01-19 09:10:42,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-01-19 09:10:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-01-19 09:10:42,518 INFO L242 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-01-19 09:10:42,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-01-19 09:10:42,519 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-01-19 09:10:42,519 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-01-19 09:10:42,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 09:10:42,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:42,520 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] [2022-01-19 09:10:42,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-19 09:10:42,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 983157472, now seen corresponding path program 1 times [2022-01-19 09:10:42,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051376543] [2022-01-19 09:10:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:42,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:42,744 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 09:10:42,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:42,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051376543] [2022-01-19 09:10:42,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051376543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:10:42,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-19 09:10:42,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-19 09:10:42,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155870717] [2022-01-19 09:10:42,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:10:42,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-19 09:10:42,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-19 09:10:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-19 09:10:42,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-01-19 09:10:42,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 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 09:10:42,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:42,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-01-19 09:10:42,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:42,898 INFO L129 PetriNetUnfolder]: 8/184 cut-off events. [2022-01-19 09:10:42,898 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-01-19 09:10:42,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 184 events. 8/184 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 248. Up to 14 conditions per place. [2022-01-19 09:10:42,900 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 21 selfloop transitions, 10 changer transitions 8/113 dead transitions. [2022-01-19 09:10:42,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 337 flow [2022-01-19 09:10:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-19 09:10:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-19 09:10:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 823 transitions. [2022-01-19 09:10:42,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7883141762452107 [2022-01-19 09:10:42,904 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 823 transitions. [2022-01-19 09:10:42,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 823 transitions. [2022-01-19 09:10:42,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:42,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 823 transitions. [2022-01-19 09:10:42,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.44444444444444) internal successors, (823), 9 states have internal predecessors, (823), 0 states have call successors, (0), 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 09:10:42,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 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 09:10:42,910 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 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 09:10:42,910 INFO L186 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 823 transitions. [2022-01-19 09:10:42,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 337 flow [2022-01-19 09:10:42,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-01-19 09:10:42,917 INFO L242 Difference]: Finished difference. Result has 110 places, 99 transitions, 244 flow [2022-01-19 09:10:42,917 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=244, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-01-19 09:10:42,919 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-01-19 09:10:42,919 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 244 flow [2022-01-19 09:10:42,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 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 09:10:42,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:42,920 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] [2022-01-19 09:10:42,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-19 09:10:42,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1344338713, now seen corresponding path program 1 times [2022-01-19 09:10:42,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487991839] [2022-01-19 09:10:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:42,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:43,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:43,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487991839] [2022-01-19 09:10:43,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487991839] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:43,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578272166] [2022-01-19 09:10:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:43,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:43,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:43,226 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 09:10:43,236 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 09:10:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:43,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-19 09:10:43,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:43,939 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 15 treesize of output 7 [2022-01-19 09:10:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:43,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:44,054 INFO L353 Elim1Store]: treesize reduction 14, result has 26.3 percent of original size [2022-01-19 09:10:44,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 13 [2022-01-19 09:10:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:44,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578272166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:44,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:44,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 15 [2022-01-19 09:10:44,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267326190] [2022-01-19 09:10:44,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:44,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-19 09:10:44,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-19 09:10:44,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-19 09:10:44,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-01-19 09:10:44,187 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 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 09:10:44,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:44,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-01-19 09:10:44,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:44,454 INFO L129 PetriNetUnfolder]: 28/243 cut-off events. [2022-01-19 09:10:44,455 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-01-19 09:10:44,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 243 events. 28/243 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 701 event pairs, 0 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 405. Up to 27 conditions per place. [2022-01-19 09:10:44,459 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 45 selfloop transitions, 15 changer transitions 9/126 dead transitions. [2022-01-19 09:10:44,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 126 transitions, 462 flow [2022-01-19 09:10:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-19 09:10:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-01-19 09:10:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1192 transitions. [2022-01-19 09:10:44,463 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6044624746450304 [2022-01-19 09:10:44,463 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1192 transitions. [2022-01-19 09:10:44,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1192 transitions. [2022-01-19 09:10:44,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:44,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1192 transitions. [2022-01-19 09:10:44,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.11764705882354) internal successors, (1192), 17 states have internal predecessors, (1192), 0 states have call successors, (0), 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 09:10:44,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 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 09:10:44,472 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 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 09:10:44,472 INFO L186 Difference]: Start difference. First operand has 110 places, 99 transitions, 244 flow. Second operand 17 states and 1192 transitions. [2022-01-19 09:10:44,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 126 transitions, 462 flow [2022-01-19 09:10:44,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 449 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-01-19 09:10:44,476 INFO L242 Difference]: Finished difference. Result has 124 places, 102 transitions, 290 flow [2022-01-19 09:10:44,477 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=290, PETRI_PLACES=124, PETRI_TRANSITIONS=102} [2022-01-19 09:10:44,477 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 21 predicate places. [2022-01-19 09:10:44,477 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 102 transitions, 290 flow [2022-01-19 09:10:44,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.66666666666667) internal successors, (1060), 15 states have internal predecessors, (1060), 0 states have call successors, (0), 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 09:10:44,478 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:44,478 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] [2022-01-19 09:10:44,500 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 09:10:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:44,692 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1208957137, now seen corresponding path program 2 times [2022-01-19 09:10:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:44,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962742476] [2022-01-19 09:10:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:44,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:44,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962742476] [2022-01-19 09:10:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962742476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317719443] [2022-01-19 09:10:44,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:10:44,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:44,999 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 09:10:45,026 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 09:10:45,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:10:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 09:10:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:45,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:10:45,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:10:45,787 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 15 treesize of output 7 [2022-01-19 09:10:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:45,883 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_89 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_89) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-01-19 09:10:45,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:10:45,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 45 [2022-01-19 09:10:45,927 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 13 treesize of output 7 [2022-01-19 09:10:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:46,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317719443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:46,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:46,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 30 [2022-01-19 09:10:46,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125470305] [2022-01-19 09:10:46,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:46,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-19 09:10:46,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-19 09:10:46,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-01-19 09:10:46,374 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-01-19 09:10:46,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 102 transitions, 290 flow. Second operand has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 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 09:10:46,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:46,377 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-01-19 09:10:46,377 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:46,843 INFO L129 PetriNetUnfolder]: 56/355 cut-off events. [2022-01-19 09:10:46,843 INFO L130 PetriNetUnfolder]: For 334/338 co-relation queries the response was YES. [2022-01-19 09:10:46,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 355 events. 56/355 cut-off events. For 334/338 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1521 event pairs, 0 based on Foata normal form. 5/339 useless extension candidates. Maximal degree in co-relation 690. Up to 74 conditions per place. [2022-01-19 09:10:46,846 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 46 selfloop transitions, 25 changer transitions 9/134 dead transitions. [2022-01-19 09:10:46,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 583 flow [2022-01-19 09:10:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 09:10:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 09:10:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1235 transitions. [2022-01-19 09:10:46,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2022-01-19 09:10:46,850 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1235 transitions. [2022-01-19 09:10:46,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1235 transitions. [2022-01-19 09:10:46,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:46,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1235 transitions. [2022-01-19 09:10:46,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.0) internal successors, (1235), 19 states have internal predecessors, (1235), 0 states have call successors, (0), 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 09:10:46,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 09:10:46,858 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 09:10:46,858 INFO L186 Difference]: Start difference. First operand has 124 places, 102 transitions, 290 flow. Second operand 19 states and 1235 transitions. [2022-01-19 09:10:46,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 583 flow [2022-01-19 09:10:46,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 134 transitions, 530 flow, removed 5 selfloop flow, removed 15 redundant places. [2022-01-19 09:10:46,862 INFO L242 Difference]: Finished difference. Result has 130 places, 115 transitions, 415 flow [2022-01-19 09:10:46,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=415, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2022-01-19 09:10:46,863 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2022-01-19 09:10:46,863 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 415 flow [2022-01-19 09:10:46,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.93333333333333) internal successors, (1918), 30 states have internal predecessors, (1918), 0 states have call successors, (0), 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 09:10:46,864 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:46,864 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] [2022-01-19 09:10:46,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-19 09:10:47,079 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,SelfDestructingSolverStorable5 [2022-01-19 09:10:47,079 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 664977125, now seen corresponding path program 3 times [2022-01-19 09:10:47,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:47,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35254955] [2022-01-19 09:10:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:47,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:47,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35254955] [2022-01-19 09:10:47,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35254955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:47,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201595243] [2022-01-19 09:10:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:10:47,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:47,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:47,306 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 09:10:47,331 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 09:10:47,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-19 09:10:47,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:47,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-19 09:10:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:10:48,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:10:48,064 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 15 treesize of output 7 [2022-01-19 09:10:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:48,196 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_114) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 09:10:48,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:10:48,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 45 [2022-01-19 09:10:48,226 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 13 treesize of output 7 [2022-01-19 09:10:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-19 09:10:48,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201595243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:48,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:48,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 30 [2022-01-19 09:10:48,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355437236] [2022-01-19 09:10:48,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:48,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-19 09:10:48,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-19 09:10:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=696, Unknown=1, NotChecked=54, Total=870 [2022-01-19 09:10:48,644 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-01-19 09:10:48,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 415 flow. Second operand has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 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 09:10:48,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:48,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-01-19 09:10:48,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:49,069 INFO L129 PetriNetUnfolder]: 72/442 cut-off events. [2022-01-19 09:10:49,069 INFO L130 PetriNetUnfolder]: For 517/531 co-relation queries the response was YES. [2022-01-19 09:10:49,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 442 events. 72/442 cut-off events. For 517/531 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2193 event pairs, 5 based on Foata normal form. 12/425 useless extension candidates. Maximal degree in co-relation 1002. Up to 106 conditions per place. [2022-01-19 09:10:49,072 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 52 selfloop transitions, 27 changer transitions 8/141 dead transitions. [2022-01-19 09:10:49,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 141 transitions, 745 flow [2022-01-19 09:10:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-19 09:10:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-01-19 09:10:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1232 transitions. [2022-01-19 09:10:49,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.558983666061706 [2022-01-19 09:10:49,076 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1232 transitions. [2022-01-19 09:10:49,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1232 transitions. [2022-01-19 09:10:49,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:49,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1232 transitions. [2022-01-19 09:10:49,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.84210526315789) internal successors, (1232), 19 states have internal predecessors, (1232), 0 states have call successors, (0), 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 09:10:49,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 09:10:49,083 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 116.0) internal successors, (2320), 20 states have internal predecessors, (2320), 0 states have call successors, (0), 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 09:10:49,084 INFO L186 Difference]: Start difference. First operand has 130 places, 115 transitions, 415 flow. Second operand 19 states and 1232 transitions. [2022-01-19 09:10:49,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 141 transitions, 745 flow [2022-01-19 09:10:49,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 141 transitions, 703 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-01-19 09:10:49,093 INFO L242 Difference]: Finished difference. Result has 137 places, 123 transitions, 538 flow [2022-01-19 09:10:49,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=538, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2022-01-19 09:10:49,094 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-01-19 09:10:49,094 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 538 flow [2022-01-19 09:10:49,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 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 09:10:49,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:49,096 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 09:10:49,122 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 09:10:49,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:49,319 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2102566367, now seen corresponding path program 4 times [2022-01-19 09:10:49,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890239660] [2022-01-19 09:10:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:49,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:49,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:49,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890239660] [2022-01-19 09:10:49,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890239660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755467682] [2022-01-19 09:10:49,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:10:49,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:49,437 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 09:10:49,462 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 09:10:49,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:10:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-19 09:10:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:49,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:50,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755467682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:50,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:50,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-19 09:10:50,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162676651] [2022-01-19 09:10:50,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:50,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-19 09:10:50,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-19 09:10:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-01-19 09:10:50,454 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:10:50,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 538 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 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 09:10:50,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:50,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:10:50,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:50,838 INFO L129 PetriNetUnfolder]: 67/613 cut-off events. [2022-01-19 09:10:50,838 INFO L130 PetriNetUnfolder]: For 1013/1039 co-relation queries the response was YES. [2022-01-19 09:10:50,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 613 events. 67/613 cut-off events. For 1013/1039 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3831 event pairs, 2 based on Foata normal form. 41/608 useless extension candidates. Maximal degree in co-relation 1304. Up to 81 conditions per place. [2022-01-19 09:10:50,842 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 34 selfloop transitions, 21 changer transitions 21/154 dead transitions. [2022-01-19 09:10:50,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 154 transitions, 894 flow [2022-01-19 09:10:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-19 09:10:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-01-19 09:10:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1341 transitions. [2022-01-19 09:10:50,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7706896551724138 [2022-01-19 09:10:50,846 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1341 transitions. [2022-01-19 09:10:50,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1341 transitions. [2022-01-19 09:10:50,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:50,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1341 transitions. [2022-01-19 09:10:50,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.4) internal successors, (1341), 15 states have internal predecessors, (1341), 0 states have call successors, (0), 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 09:10:50,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 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 09:10:50,853 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 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 09:10:50,853 INFO L186 Difference]: Start difference. First operand has 137 places, 123 transitions, 538 flow. Second operand 15 states and 1341 transitions. [2022-01-19 09:10:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 154 transitions, 894 flow [2022-01-19 09:10:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 852 flow, removed 2 selfloop flow, removed 15 redundant places. [2022-01-19 09:10:50,859 INFO L242 Difference]: Finished difference. Result has 141 places, 127 transitions, 605 flow [2022-01-19 09:10:50,859 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=605, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-01-19 09:10:50,862 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 38 predicate places. [2022-01-19 09:10:50,862 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 605 flow [2022-01-19 09:10:50,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 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 09:10:50,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:50,863 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 09:10:50,887 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 09:10:51,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:51,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 735680284, now seen corresponding path program 5 times [2022-01-19 09:10:51,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:51,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381514820] [2022-01-19 09:10:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:51,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:51,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381514820] [2022-01-19 09:10:51,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381514820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115314912] [2022-01-19 09:10:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:10:51,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:51,311 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 09:10:51,358 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 09:10:51,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:10:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-19 09:10:51,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:51,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 09:10:51,605 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:10:51,606 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 11 treesize of output 11 [2022-01-19 09:10:51,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:10:51,944 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 15 treesize of output 7 [2022-01-19 09:10:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 09:10:51,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:52,051 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_168 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_168) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-01-19 09:10:52,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:10:52,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 45 [2022-01-19 09:10:52,075 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 13 treesize of output 7 [2022-01-19 09:10:52,591 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 10 treesize of output 8 [2022-01-19 09:10:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 09:10:52,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115314912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:52,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:52,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 32 [2022-01-19 09:10:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898688726] [2022-01-19 09:10:52,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-19 09:10:52,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-19 09:10:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=803, Unknown=1, NotChecked=58, Total=992 [2022-01-19 09:10:52,627 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 116 [2022-01-19 09:10:52,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 605 flow. Second operand has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 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 09:10:52,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:52,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 116 [2022-01-19 09:10:52,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:53,169 INFO L129 PetriNetUnfolder]: 112/671 cut-off events. [2022-01-19 09:10:53,170 INFO L130 PetriNetUnfolder]: For 1707/1724 co-relation queries the response was YES. [2022-01-19 09:10:53,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 671 events. 112/671 cut-off events. For 1707/1724 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4246 event pairs, 6 based on Foata normal form. 15/637 useless extension candidates. Maximal degree in co-relation 1818. Up to 153 conditions per place. [2022-01-19 09:10:53,176 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 65 selfloop transitions, 42 changer transitions 10/172 dead transitions. [2022-01-19 09:10:53,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 172 transitions, 1206 flow [2022-01-19 09:10:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-19 09:10:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-19 09:10:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1228 transitions. [2022-01-19 09:10:53,181 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5293103448275862 [2022-01-19 09:10:53,181 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1228 transitions. [2022-01-19 09:10:53,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1228 transitions. [2022-01-19 09:10:53,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:53,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1228 transitions. [2022-01-19 09:10:53,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.4) internal successors, (1228), 20 states have internal predecessors, (1228), 0 states have call successors, (0), 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 09:10:53,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 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 09:10:53,189 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 116.0) internal successors, (2436), 21 states have internal predecessors, (2436), 0 states have call successors, (0), 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 09:10:53,189 INFO L186 Difference]: Start difference. First operand has 141 places, 127 transitions, 605 flow. Second operand 20 states and 1228 transitions. [2022-01-19 09:10:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 172 transitions, 1206 flow [2022-01-19 09:10:53,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 172 transitions, 1143 flow, removed 26 selfloop flow, removed 8 redundant places. [2022-01-19 09:10:53,200 INFO L242 Difference]: Finished difference. Result has 155 places, 149 transitions, 981 flow [2022-01-19 09:10:53,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=981, PETRI_PLACES=155, PETRI_TRANSITIONS=149} [2022-01-19 09:10:53,201 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 52 predicate places. [2022-01-19 09:10:53,201 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 149 transitions, 981 flow [2022-01-19 09:10:53,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 60.3125) internal successors, (1930), 32 states have internal predecessors, (1930), 0 states have call successors, (0), 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 09:10:53,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:53,203 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 09:10:53,229 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 09:10:53,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:53,416 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash -179513234, now seen corresponding path program 6 times [2022-01-19 09:10:53,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142327865] [2022-01-19 09:10:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:53,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:10:53,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142327865] [2022-01-19 09:10:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142327865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664845489] [2022-01-19 09:10:53,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:10:53,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:53,968 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 09:10:53,974 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 09:10:54,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-19 09:10:54,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-19 09:10:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:10:54,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-19 09:10:54,805 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 15 treesize of output 7 [2022-01-19 09:10:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:54,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:54,922 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_197 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_197) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-01-19 09:10:54,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:10:54,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 45 [2022-01-19 09:10:54,955 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 13 treesize of output 7 [2022-01-19 09:10:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-01-19 09:10:55,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664845489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:55,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:55,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 40 [2022-01-19 09:10:55,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607169520] [2022-01-19 09:10:55,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:55,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-19 09:10:55,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-19 09:10:55,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1299, Unknown=1, NotChecked=74, Total=1560 [2022-01-19 09:10:55,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2022-01-19 09:10:55,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 149 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 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 09:10:55,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:55,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2022-01-19 09:10:55,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:56,107 INFO L129 PetriNetUnfolder]: 117/725 cut-off events. [2022-01-19 09:10:56,107 INFO L130 PetriNetUnfolder]: For 2209/2230 co-relation queries the response was YES. [2022-01-19 09:10:56,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 725 events. 117/725 cut-off events. For 2209/2230 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4759 event pairs, 2 based on Foata normal form. 12/682 useless extension candidates. Maximal degree in co-relation 2068. Up to 115 conditions per place. [2022-01-19 09:10:56,112 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 68 selfloop transitions, 50 changer transitions 8/169 dead transitions. [2022-01-19 09:10:56,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 169 transitions, 1357 flow [2022-01-19 09:10:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 09:10:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 09:10:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1177 transitions. [2022-01-19 09:10:56,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46120689655172414 [2022-01-19 09:10:56,116 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1177 transitions. [2022-01-19 09:10:56,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1177 transitions. [2022-01-19 09:10:56,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:56,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1177 transitions. [2022-01-19 09:10:56,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.5) internal successors, (1177), 22 states have internal predecessors, (1177), 0 states have call successors, (0), 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 09:10:56,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:10:56,128 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:10:56,129 INFO L186 Difference]: Start difference. First operand has 155 places, 149 transitions, 981 flow. Second operand 22 states and 1177 transitions. [2022-01-19 09:10:56,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 169 transitions, 1357 flow [2022-01-19 09:10:56,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 1283 flow, removed 14 selfloop flow, removed 15 redundant places. [2022-01-19 09:10:56,137 INFO L242 Difference]: Finished difference. Result has 163 places, 151 transitions, 1070 flow [2022-01-19 09:10:56,138 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1070, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2022-01-19 09:10:56,139 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 60 predicate places. [2022-01-19 09:10:56,139 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1070 flow [2022-01-19 09:10:56,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 53.325) internal successors, (2133), 40 states have internal predecessors, (2133), 0 states have call successors, (0), 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 09:10:56,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:56,140 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2022-01-19 09:10:56,168 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 09:10:56,355 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 09:10:56,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 922780630, now seen corresponding path program 7 times [2022-01-19 09:10:56,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:56,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561991635] [2022-01-19 09:10:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:56,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:56,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561991635] [2022-01-19 09:10:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561991635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225234129] [2022-01-19 09:10:56,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:10:56,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:56,407 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 09:10:56,428 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 09:10:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-19 09:10:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 09:10:56,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-19 09:10:56,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225234129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-19 09:10:56,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-19 09:10:56,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-01-19 09:10:56,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307410667] [2022-01-19 09:10:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-19 09:10:56,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-19 09:10:56,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-19 09:10:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-19 09:10:56,626 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 09:10:56,626 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1070 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 09:10:56,626 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:56,626 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 09:10:56,626 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:56,730 INFO L129 PetriNetUnfolder]: 105/764 cut-off events. [2022-01-19 09:10:56,730 INFO L130 PetriNetUnfolder]: For 2908/2924 co-relation queries the response was YES. [2022-01-19 09:10:56,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2084 conditions, 764 events. 105/764 cut-off events. For 2908/2924 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5252 event pairs, 6 based on Foata normal form. 23/734 useless extension candidates. Maximal degree in co-relation 2056. Up to 133 conditions per place. [2022-01-19 09:10:56,736 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 35 selfloop transitions, 21 changer transitions 2/162 dead transitions. [2022-01-19 09:10:56,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 162 transitions, 1280 flow [2022-01-19 09:10:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-19 09:10:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-01-19 09:10:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2022-01-19 09:10:56,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2022-01-19 09:10:56,738 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2022-01-19 09:10:56,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2022-01-19 09:10:56,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:56,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2022-01-19 09:10:56,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 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 09:10:56,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 09:10:56,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 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 09:10:56,740 INFO L186 Difference]: Start difference. First operand has 163 places, 151 transitions, 1070 flow. Second operand 4 states and 425 transitions. [2022-01-19 09:10:56,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 162 transitions, 1280 flow [2022-01-19 09:10:56,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 162 transitions, 1186 flow, removed 13 selfloop flow, removed 19 redundant places. [2022-01-19 09:10:56,748 INFO L242 Difference]: Finished difference. Result has 147 places, 154 transitions, 1116 flow [2022-01-19 09:10:56,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2022-01-19 09:10:56,749 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 44 predicate places. [2022-01-19 09:10:56,749 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1116 flow [2022-01-19 09:10:56,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 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 09:10:56,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:56,750 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-01-19 09:10:56,774 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 09:10:56,973 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 09:10:56,974 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -565034456, now seen corresponding path program 8 times [2022-01-19 09:10:56,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:56,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113095455] [2022-01-19 09:10:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:56,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:57,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113095455] [2022-01-19 09:10:57,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113095455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056578916] [2022-01-19 09:10:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:10:57,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:57,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:57,209 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 09:10:57,229 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 09:10:57,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:10:57,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-19 09:10:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:57,630 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 09:10:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:57,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:10:57,746 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 09:10:57,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 13 [2022-01-19 09:10:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:57,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056578916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:10:57,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:10:57,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 22 [2022-01-19 09:10:57,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181560893] [2022-01-19 09:10:57,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:10:57,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-19 09:10:57,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:10:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-19 09:10:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-19 09:10:57,913 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-01-19 09:10:57,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1116 flow. Second operand has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 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 09:10:57,915 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:10:57,915 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-01-19 09:10:57,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:10:58,705 INFO L129 PetriNetUnfolder]: 153/985 cut-off events. [2022-01-19 09:10:58,705 INFO L130 PetriNetUnfolder]: For 4329/4352 co-relation queries the response was YES. [2022-01-19 09:10:58,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 985 events. 153/985 cut-off events. For 4329/4352 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7335 event pairs, 0 based on Foata normal form. 15/928 useless extension candidates. Maximal degree in co-relation 2962. Up to 177 conditions per place. [2022-01-19 09:10:58,713 INFO L132 encePairwiseOnDemand]: 100/116 looper letters, 88 selfloop transitions, 62 changer transitions 45/257 dead transitions. [2022-01-19 09:10:58,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 2205 flow [2022-01-19 09:10:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-19 09:10:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-19 09:10:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2602 transitions. [2022-01-19 09:10:58,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6062441752096924 [2022-01-19 09:10:58,718 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2602 transitions. [2022-01-19 09:10:58,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2602 transitions. [2022-01-19 09:10:58,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:10:58,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2602 transitions. [2022-01-19 09:10:58,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 70.32432432432432) internal successors, (2602), 37 states have internal predecessors, (2602), 0 states have call successors, (0), 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 09:10:58,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 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 09:10:58,741 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 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 09:10:58,741 INFO L186 Difference]: Start difference. First operand has 147 places, 154 transitions, 1116 flow. Second operand 37 states and 2602 transitions. [2022-01-19 09:10:58,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 2205 flow [2022-01-19 09:10:58,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 257 transitions, 2193 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-01-19 09:10:58,756 INFO L242 Difference]: Finished difference. Result has 198 places, 164 transitions, 1460 flow [2022-01-19 09:10:58,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1460, PETRI_PLACES=198, PETRI_TRANSITIONS=164} [2022-01-19 09:10:58,757 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 95 predicate places. [2022-01-19 09:10:58,757 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 164 transitions, 1460 flow [2022-01-19 09:10:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 69.95454545454545) internal successors, (1539), 22 states have internal predecessors, (1539), 0 states have call successors, (0), 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 09:10:58,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:10:58,758 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-01-19 09:10:58,785 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 09:10:58,972 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,SelfDestructingSolverStorable11 [2022-01-19 09:10:58,972 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:10:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:10:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash 714619008, now seen corresponding path program 9 times [2022-01-19 09:10:58,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:10:58,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111556566] [2022-01-19 09:10:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:10:58,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:10:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:10:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:10:59,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:10:59,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111556566] [2022-01-19 09:10:59,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111556566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:10:59,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532091864] [2022-01-19 09:10:59,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:10:59,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:10:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:10:59,258 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 09:10:59,259 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 09:10:59,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-19 09:10:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:10:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-19 09:10:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:10:59,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 09:10:59,807 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:10:59,808 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 11 treesize of output 11 [2022-01-19 09:11:00,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 09:11:00,322 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 09:11:00,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-01-19 09:11:02,928 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-19 09:11:02,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 10 [2022-01-19 09:11:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:11:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:04,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:11:04,173 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 61 treesize of output 49 [2022-01-19 09:11:04,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:11:04,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 192 treesize of output 183 [2022-01-19 09:11:04,190 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 136 treesize of output 108 [2022-01-19 09:11:04,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:11:04,203 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 135 treesize of output 132 [2022-01-19 09:11:05,421 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 10 treesize of output 8 [2022-01-19 09:11:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-19 09:11:05,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532091864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:05,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:05,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 57 [2022-01-19 09:11:05,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860000661] [2022-01-19 09:11:05,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:05,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 09:11:05,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 09:11:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2868, Unknown=14, NotChecked=0, Total=3192 [2022-01-19 09:11:05,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 09:11:05,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 164 transitions, 1460 flow. Second operand has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 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 09:11:05,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:05,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 09:11:05,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:18,904 INFO L129 PetriNetUnfolder]: 468/2694 cut-off events. [2022-01-19 09:11:18,904 INFO L130 PetriNetUnfolder]: For 15770/15831 co-relation queries the response was YES. [2022-01-19 09:11:18,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8691 conditions, 2694 events. 468/2694 cut-off events. For 15770/15831 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27070 event pairs, 15 based on Foata normal form. 33/2499 useless extension candidates. Maximal degree in co-relation 8646. Up to 510 conditions per place. [2022-01-19 09:11:18,930 INFO L132 encePairwiseOnDemand]: 83/116 looper letters, 157 selfloop transitions, 178 changer transitions 21/396 dead transitions. [2022-01-19 09:11:18,931 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 396 transitions, 4897 flow [2022-01-19 09:11:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-19 09:11:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-01-19 09:11:18,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2796 transitions. [2022-01-19 09:11:18,935 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4304187192118227 [2022-01-19 09:11:18,935 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2796 transitions. [2022-01-19 09:11:18,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2796 transitions. [2022-01-19 09:11:18,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:18,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2796 transitions. [2022-01-19 09:11:18,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 49.92857142857143) internal successors, (2796), 56 states have internal predecessors, (2796), 0 states have call successors, (0), 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 09:11:18,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 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 09:11:18,947 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 116.0) internal successors, (6612), 57 states have internal predecessors, (6612), 0 states have call successors, (0), 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 09:11:18,947 INFO L186 Difference]: Start difference. First operand has 198 places, 164 transitions, 1460 flow. Second operand 56 states and 2796 transitions. [2022-01-19 09:11:18,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 396 transitions, 4897 flow [2022-01-19 09:11:18,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 396 transitions, 4198 flow, removed 190 selfloop flow, removed 27 redundant places. [2022-01-19 09:11:18,984 INFO L242 Difference]: Finished difference. Result has 243 places, 310 transitions, 3749 flow [2022-01-19 09:11:18,984 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3749, PETRI_PLACES=243, PETRI_TRANSITIONS=310} [2022-01-19 09:11:18,985 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 140 predicate places. [2022-01-19 09:11:18,987 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 310 transitions, 3749 flow [2022-01-19 09:11:18,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 48.771929824561404) internal successors, (2780), 57 states have internal predecessors, (2780), 0 states have call successors, (0), 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 09:11:18,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:18,988 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 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] [2022-01-19 09:11:19,015 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 09:11:19,215 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,SelfDestructingSolverStorable12 [2022-01-19 09:11:19,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2090811098, now seen corresponding path program 10 times [2022-01-19 09:11:19,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:19,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344339133] [2022-01-19 09:11:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:19,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:19,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:19,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344339133] [2022-01-19 09:11:19,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344339133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:19,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111627390] [2022-01-19 09:11:19,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:11:19,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:19,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:19,500 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 09:11:19,503 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 09:11:19,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:11:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:19,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-19 09:11:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:19,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 09:11:19,797 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:11:19,797 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 11 treesize of output 11 [2022-01-19 09:11:20,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:11:20,278 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 09:11:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:11:20,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:20,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-01-19 09:11:20,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:11:20,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 47 [2022-01-19 09:11:20,427 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 14 treesize of output 7 [2022-01-19 09:11:20,884 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 10 treesize of output 8 [2022-01-19 09:11:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:20,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111627390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:20,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:20,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2022-01-19 09:11:20,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824301533] [2022-01-19 09:11:20,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:20,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-19 09:11:20,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-19 09:11:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2022-01-19 09:11:20,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 116 [2022-01-19 09:11:20,937 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 310 transitions, 3749 flow. Second operand has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 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 09:11:20,937 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:20,937 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 116 [2022-01-19 09:11:20,937 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:22,232 INFO L129 PetriNetUnfolder]: 513/2915 cut-off events. [2022-01-19 09:11:22,232 INFO L130 PetriNetUnfolder]: For 24917/25070 co-relation queries the response was YES. [2022-01-19 09:11:22,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11646 conditions, 2915 events. 513/2915 cut-off events. For 24917/25070 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 30028 event pairs, 2 based on Foata normal form. 67/2729 useless extension candidates. Maximal degree in co-relation 11586. Up to 580 conditions per place. [2022-01-19 09:11:22,263 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 161 selfloop transitions, 184 changer transitions 33/423 dead transitions. [2022-01-19 09:11:22,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 423 transitions, 6132 flow [2022-01-19 09:11:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-19 09:11:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-01-19 09:11:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1524 transitions. [2022-01-19 09:11:22,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48659003831417624 [2022-01-19 09:11:22,266 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1524 transitions. [2022-01-19 09:11:22,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1524 transitions. [2022-01-19 09:11:22,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:22,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1524 transitions. [2022-01-19 09:11:22,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.44444444444444) internal successors, (1524), 27 states have internal predecessors, (1524), 0 states have call successors, (0), 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 09:11:22,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 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 09:11:22,273 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 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 09:11:22,273 INFO L186 Difference]: Start difference. First operand has 243 places, 310 transitions, 3749 flow. Second operand 27 states and 1524 transitions. [2022-01-19 09:11:22,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 423 transitions, 6132 flow [2022-01-19 09:11:22,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 423 transitions, 5584 flow, removed 246 selfloop flow, removed 22 redundant places. [2022-01-19 09:11:22,362 INFO L242 Difference]: Finished difference. Result has 245 places, 336 transitions, 4259 flow [2022-01-19 09:11:22,362 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4259, PETRI_PLACES=245, PETRI_TRANSITIONS=336} [2022-01-19 09:11:22,362 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 142 predicate places. [2022-01-19 09:11:22,363 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 336 transitions, 4259 flow [2022-01-19 09:11:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 55.15384615384615) internal successors, (2151), 39 states have internal predecessors, (2151), 0 states have call successors, (0), 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 09:11:22,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:22,363 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-01-19 09:11:22,387 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 09:11:22,587 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,SelfDestructingSolverStorable13 [2022-01-19 09:11:22,588 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash 786721058, now seen corresponding path program 11 times [2022-01-19 09:11:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:22,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146711447] [2022-01-19 09:11:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:22,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:22,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146711447] [2022-01-19 09:11:22,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146711447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21008624] [2022-01-19 09:11:22,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:11:22,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:22,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:22,641 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 09:11:22,642 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 09:11:22,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-19 09:11:22,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-19 09:11:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:22,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21008624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:23,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:23,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-19 09:11:23,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778320082] [2022-01-19 09:11:23,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:23,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-19 09:11:23,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-19 09:11:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-19 09:11:23,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 09:11:23,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 336 transitions, 4259 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 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 09:11:23,066 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:23,066 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 09:11:23,066 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:23,690 INFO L129 PetriNetUnfolder]: 635/3879 cut-off events. [2022-01-19 09:11:23,690 INFO L130 PetriNetUnfolder]: For 38267/38467 co-relation queries the response was YES. [2022-01-19 09:11:23,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15375 conditions, 3879 events. 635/3879 cut-off events. For 38267/38467 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42941 event pairs, 55 based on Foata normal form. 102/3654 useless extension candidates. Maximal degree in co-relation 15314. Up to 778 conditions per place. [2022-01-19 09:11:23,725 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 108 selfloop transitions, 165 changer transitions 14/418 dead transitions. [2022-01-19 09:11:23,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 418 transitions, 6180 flow [2022-01-19 09:11:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-19 09:11:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-01-19 09:11:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-01-19 09:11:23,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2022-01-19 09:11:23,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-01-19 09:11:23,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-01-19 09:11:23,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:23,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-01-19 09:11:23,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 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 09:11:23,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 09:11:23,729 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 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 09:11:23,729 INFO L186 Difference]: Start difference. First operand has 245 places, 336 transitions, 4259 flow. Second operand 5 states and 532 transitions. [2022-01-19 09:11:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 418 transitions, 6180 flow [2022-01-19 09:11:23,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 418 transitions, 5574 flow, removed 81 selfloop flow, removed 24 redundant places. [2022-01-19 09:11:23,831 INFO L242 Difference]: Finished difference. Result has 226 places, 391 transitions, 5388 flow [2022-01-19 09:11:23,831 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5388, PETRI_PLACES=226, PETRI_TRANSITIONS=391} [2022-01-19 09:11:23,832 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 123 predicate places. [2022-01-19 09:11:23,832 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 391 transitions, 5388 flow [2022-01-19 09:11:23,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 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 09:11:23,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:23,832 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-01-19 09:11:23,850 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 09:11:24,036 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,SelfDestructingSolverStorable14 [2022-01-19 09:11:24,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1903099010, now seen corresponding path program 12 times [2022-01-19 09:11:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689636698] [2022-01-19 09:11:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:24,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-19 09:11:24,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689636698] [2022-01-19 09:11:24,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689636698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223359516] [2022-01-19 09:11:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:11:24,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:24,215 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 09:11:24,215 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 09:11:24,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-19 09:11:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:24,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-19 09:11:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:25,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223359516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:25,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-01-19 09:11:25,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255103616] [2022-01-19 09:11:25,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:25,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-19 09:11:25,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-19 09:11:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-01-19 09:11:25,543 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:11:25,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 391 transitions, 5388 flow. Second operand has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 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 09:11:25,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:25,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:11:25,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:26,669 INFO L129 PetriNetUnfolder]: 538/3866 cut-off events. [2022-01-19 09:11:26,669 INFO L130 PetriNetUnfolder]: For 41507/41697 co-relation queries the response was YES. [2022-01-19 09:11:26,693 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15855 conditions, 3866 events. 538/3866 cut-off events. For 41507/41697 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44109 event pairs, 68 based on Foata normal form. 133/3671 useless extension candidates. Maximal degree in co-relation 15794. Up to 682 conditions per place. [2022-01-19 09:11:26,710 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 142 selfloop transitions, 48 changer transitions 139/418 dead transitions. [2022-01-19 09:11:26,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 418 transitions, 6607 flow [2022-01-19 09:11:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 09:11:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 09:11:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1959 transitions. [2022-01-19 09:11:26,712 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7676332288401254 [2022-01-19 09:11:26,712 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1959 transitions. [2022-01-19 09:11:26,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1959 transitions. [2022-01-19 09:11:26,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:26,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1959 transitions. [2022-01-19 09:11:26,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.04545454545455) internal successors, (1959), 22 states have internal predecessors, (1959), 0 states have call successors, (0), 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 09:11:26,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:11:26,722 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:11:26,723 INFO L186 Difference]: Start difference. First operand has 226 places, 391 transitions, 5388 flow. Second operand 22 states and 1959 transitions. [2022-01-19 09:11:26,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 418 transitions, 6607 flow [2022-01-19 09:11:26,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 418 transitions, 6419 flow, removed 56 selfloop flow, removed 3 redundant places. [2022-01-19 09:11:26,808 INFO L242 Difference]: Finished difference. Result has 246 places, 272 transitions, 3490 flow [2022-01-19 09:11:26,808 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3490, PETRI_PLACES=246, PETRI_TRANSITIONS=272} [2022-01-19 09:11:26,808 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 143 predicate places. [2022-01-19 09:11:26,808 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 272 transitions, 3490 flow [2022-01-19 09:11:26,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.4) internal successors, (3094), 35 states have internal predecessors, (3094), 0 states have call successors, (0), 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 09:11:26,809 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:26,809 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:11:26,828 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 09:11:27,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-19 09:11:27,016 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -469047527, now seen corresponding path program 13 times [2022-01-19 09:11:27,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989260902] [2022-01-19 09:11:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:27,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:27,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989260902] [2022-01-19 09:11:27,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989260902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196337848] [2022-01-19 09:11:27,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:11:27,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:27,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:27,401 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 09:11:27,402 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 09:11:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-19 09:11:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:27,901 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 09:11:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:11:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:28,026 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 09:11:28,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 13 [2022-01-19 09:11:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:11:28,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196337848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:28,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:28,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 33 [2022-01-19 09:11:28,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127161692] [2022-01-19 09:11:28,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:28,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-19 09:11:28,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-19 09:11:28,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-01-19 09:11:28,211 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 09:11:28,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 272 transitions, 3490 flow. Second operand has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 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 09:11:28,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:28,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 09:11:28,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:30,388 INFO L129 PetriNetUnfolder]: 563/3245 cut-off events. [2022-01-19 09:11:30,389 INFO L130 PetriNetUnfolder]: For 33092/33136 co-relation queries the response was YES. [2022-01-19 09:11:30,409 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 3245 events. 563/3245 cut-off events. For 33092/33136 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 33993 event pairs, 2 based on Foata normal form. 21/2994 useless extension candidates. Maximal degree in co-relation 13878. Up to 697 conditions per place. [2022-01-19 09:11:30,422 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 191 selfloop transitions, 206 changer transitions 107/554 dead transitions. [2022-01-19 09:11:30,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 554 transitions, 8697 flow [2022-01-19 09:11:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-19 09:11:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-01-19 09:11:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5138 transitions. [2022-01-19 09:11:30,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5536637931034483 [2022-01-19 09:11:30,426 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5138 transitions. [2022-01-19 09:11:30,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5138 transitions. [2022-01-19 09:11:30,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:30,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5138 transitions. [2022-01-19 09:11:30,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 64.225) internal successors, (5138), 80 states have internal predecessors, (5138), 0 states have call successors, (0), 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 09:11:30,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 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 09:11:30,443 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 116.0) internal successors, (9396), 81 states have internal predecessors, (9396), 0 states have call successors, (0), 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 09:11:30,443 INFO L186 Difference]: Start difference. First operand has 246 places, 272 transitions, 3490 flow. Second operand 80 states and 5138 transitions. [2022-01-19 09:11:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 554 transitions, 8697 flow [2022-01-19 09:11:30,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 554 transitions, 7715 flow, removed 456 selfloop flow, removed 26 redundant places. [2022-01-19 09:11:30,535 INFO L242 Difference]: Finished difference. Result has 319 places, 322 transitions, 4814 flow [2022-01-19 09:11:30,535 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=4814, PETRI_PLACES=319, PETRI_TRANSITIONS=322} [2022-01-19 09:11:30,536 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 216 predicate places. [2022-01-19 09:11:30,536 INFO L470 AbstractCegarLoop]: Abstraction has has 319 places, 322 transitions, 4814 flow [2022-01-19 09:11:30,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 63.666666666666664) internal successors, (2101), 33 states have internal predecessors, (2101), 0 states have call successors, (0), 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 09:11:30,537 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:30,537 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:11:30,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:30,751 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,SelfDestructingSolverStorable16 [2022-01-19 09:11:30,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -843056299, now seen corresponding path program 14 times [2022-01-19 09:11:30,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:30,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744486036] [2022-01-19 09:11:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:30,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:11:31,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744486036] [2022-01-19 09:11:31,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744486036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720226647] [2022-01-19 09:11:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:11:31,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:31,276 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 09:11:31,284 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 09:11:31,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:11:31,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-19 09:11:31,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:11:31,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:11:32,125 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 09:11:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:11:32,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:32,271 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_437) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2022-01-19 09:11:32,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:11:32,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 47 [2022-01-19 09:11:32,300 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 14 treesize of output 7 [2022-01-19 09:11:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:11:32,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720226647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:32,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:32,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 48 [2022-01-19 09:11:32,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065251746] [2022-01-19 09:11:32,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:32,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-19 09:11:32,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-19 09:11:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1979, Unknown=1, NotChecked=90, Total=2256 [2022-01-19 09:11:32,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 116 [2022-01-19 09:11:32,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 322 transitions, 4814 flow. Second operand has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 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 09:11:32,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:32,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 116 [2022-01-19 09:11:32,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:34,920 INFO L129 PetriNetUnfolder]: 698/3766 cut-off events. [2022-01-19 09:11:34,920 INFO L130 PetriNetUnfolder]: For 36302/36495 co-relation queries the response was YES. [2022-01-19 09:11:34,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15871 conditions, 3766 events. 698/3766 cut-off events. For 36302/36495 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 40364 event pairs, 2 based on Foata normal form. 40/3483 useless extension candidates. Maximal degree in co-relation 15781. Up to 859 conditions per place. [2022-01-19 09:11:34,964 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 129 selfloop transitions, 259 changer transitions 37/472 dead transitions. [2022-01-19 09:11:34,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 472 transitions, 7883 flow [2022-01-19 09:11:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-19 09:11:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-01-19 09:11:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2440 transitions. [2022-01-19 09:11:34,967 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5130361648444071 [2022-01-19 09:11:34,967 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2440 transitions. [2022-01-19 09:11:34,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2440 transitions. [2022-01-19 09:11:34,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:34,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2440 transitions. [2022-01-19 09:11:34,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 59.51219512195122) internal successors, (2440), 41 states have internal predecessors, (2440), 0 states have call successors, (0), 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 09:11:34,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 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 09:11:34,975 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 116.0) internal successors, (4872), 42 states have internal predecessors, (4872), 0 states have call successors, (0), 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 09:11:34,975 INFO L186 Difference]: Start difference. First operand has 319 places, 322 transitions, 4814 flow. Second operand 41 states and 2440 transitions. [2022-01-19 09:11:34,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 472 transitions, 7883 flow [2022-01-19 09:11:35,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 472 transitions, 7266 flow, removed 126 selfloop flow, removed 52 redundant places. [2022-01-19 09:11:35,095 INFO L242 Difference]: Finished difference. Result has 288 places, 373 transitions, 5846 flow [2022-01-19 09:11:35,096 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4281, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5846, PETRI_PLACES=288, PETRI_TRANSITIONS=373} [2022-01-19 09:11:35,096 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 185 predicate places. [2022-01-19 09:11:35,096 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 373 transitions, 5846 flow [2022-01-19 09:11:35,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 57.770833333333336) internal successors, (2773), 48 states have internal predecessors, (2773), 0 states have call successors, (0), 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 09:11:35,097 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:35,097 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:11:35,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-19 09:11:35,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:35,319 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash 351860543, now seen corresponding path program 15 times [2022-01-19 09:11:35,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:35,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043365996] [2022-01-19 09:11:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:35,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-19 09:11:35,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043365996] [2022-01-19 09:11:35,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043365996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379403609] [2022-01-19 09:11:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:11:35,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:35,383 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 09:11:35,385 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 09:11:35,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-19 09:11:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-19 09:11:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:37,235 INFO L353 Elim1Store]: treesize reduction 60, result has 4.8 percent of original size [2022-01-19 09:11:37,235 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 13 [2022-01-19 09:11:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:37,640 INFO L353 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2022-01-19 09:11:37,640 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 36 [2022-01-19 09:11:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:11:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379403609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:38,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:38,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 21] total 41 [2022-01-19 09:11:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108388147] [2022-01-19 09:11:38,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:38,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-19 09:11:38,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-19 09:11:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-01-19 09:11:38,532 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-01-19 09:11:38,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 373 transitions, 5846 flow. Second operand has 41 states, 41 states have (on average 66.60975609756098) internal successors, (2731), 41 states have internal predecessors, (2731), 0 states have call successors, (0), 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 09:11:38,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:38,533 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-01-19 09:11:38,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:11:56,474 INFO L129 PetriNetUnfolder]: 5563/28524 cut-off events. [2022-01-19 09:11:56,474 INFO L130 PetriNetUnfolder]: For 362309/364311 co-relation queries the response was YES. [2022-01-19 09:11:56,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127379 conditions, 28524 events. 5563/28524 cut-off events. For 362309/364311 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 435527 event pairs, 37 based on Foata normal form. 611/26628 useless extension candidates. Maximal degree in co-relation 127309. Up to 6889 conditions per place. [2022-01-19 09:11:57,022 INFO L132 encePairwiseOnDemand]: 92/116 looper letters, 612 selfloop transitions, 1916 changer transitions 521/3102 dead transitions. [2022-01-19 09:11:57,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 3102 transitions, 62146 flow [2022-01-19 09:11:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-01-19 09:11:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2022-01-19 09:11:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 20687 transitions. [2022-01-19 09:11:57,039 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5790136587550381 [2022-01-19 09:11:57,039 INFO L72 ComplementDD]: Start complementDD. Operand 308 states and 20687 transitions. [2022-01-19 09:11:57,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 308 states and 20687 transitions. [2022-01-19 09:11:57,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:11:57,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 308 states and 20687 transitions. [2022-01-19 09:11:57,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 309 states, 308 states have (on average 67.16558441558442) internal successors, (20687), 308 states have internal predecessors, (20687), 0 states have call successors, (0), 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 09:11:57,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 309 states, 309 states have (on average 116.0) internal successors, (35844), 309 states have internal predecessors, (35844), 0 states have call successors, (0), 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 09:11:57,108 INFO L81 ComplementDD]: Finished complementDD. Result has 309 states, 309 states have (on average 116.0) internal successors, (35844), 309 states have internal predecessors, (35844), 0 states have call successors, (0), 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 09:11:57,108 INFO L186 Difference]: Start difference. First operand has 288 places, 373 transitions, 5846 flow. Second operand 308 states and 20687 transitions. [2022-01-19 09:11:57,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 3102 transitions, 62146 flow [2022-01-19 09:11:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 3102 transitions, 58747 flow, removed 1058 selfloop flow, removed 27 redundant places. [2022-01-19 09:11:58,661 INFO L242 Difference]: Finished difference. Result has 748 places, 2171 transitions, 46105 flow [2022-01-19 09:11:58,662 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=308, PETRI_FLOW=46105, PETRI_PLACES=748, PETRI_TRANSITIONS=2171} [2022-01-19 09:11:58,662 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 645 predicate places. [2022-01-19 09:11:58,662 INFO L470 AbstractCegarLoop]: Abstraction has has 748 places, 2171 transitions, 46105 flow [2022-01-19 09:11:58,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 66.60975609756098) internal successors, (2731), 41 states have internal predecessors, (2731), 0 states have call successors, (0), 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 09:11:58,663 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:11:58,663 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:11:58,687 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 09:11:58,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:58,884 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:11:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:11:58,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1115818279, now seen corresponding path program 16 times [2022-01-19 09:11:58,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:11:58,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85192215] [2022-01-19 09:11:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:11:58,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:11:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:11:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:11:58,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:11:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85192215] [2022-01-19 09:11:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85192215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:11:58,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143611621] [2022-01-19 09:11:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:11:58,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:11:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:11:58,940 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 09:11:58,941 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 09:11:59,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:11:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:11:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-19 09:11:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:11:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:11:59,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:11:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-19 09:11:59,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143611621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:11:59,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:11:59,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-19 09:11:59,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647263352] [2022-01-19 09:11:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:11:59,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-19 09:11:59,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:11:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-19 09:11:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-19 09:11:59,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 09:11:59,402 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 2171 transitions, 46105 flow. Second operand has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 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 09:11:59,402 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:11:59,402 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 09:11:59,402 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:16,754 INFO L129 PetriNetUnfolder]: 5844/31369 cut-off events. [2022-01-19 09:12:16,754 INFO L130 PetriNetUnfolder]: For 4424435/4431871 co-relation queries the response was YES. [2022-01-19 09:12:18,596 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281214 conditions, 31369 events. 5844/31369 cut-off events. For 4424435/4431871 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 489667 event pairs, 581 based on Foata normal form. 490/29068 useless extension candidates. Maximal degree in co-relation 280965. Up to 7552 conditions per place. [2022-01-19 09:12:18,780 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 1173 selfloop transitions, 1334 changer transitions 41/2794 dead transitions. [2022-01-19 09:12:18,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2794 transitions, 65746 flow [2022-01-19 09:12:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-19 09:12:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-01-19 09:12:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-01-19 09:12:18,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-01-19 09:12:18,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-01-19 09:12:18,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-01-19 09:12:18,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:18,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-01-19 09:12:18,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 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 09:12:18,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 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 09:12:18,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 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 09:12:18,783 INFO L186 Difference]: Start difference. First operand has 748 places, 2171 transitions, 46105 flow. Second operand 6 states and 639 transitions. [2022-01-19 09:12:18,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2794 transitions, 65746 flow [2022-01-19 09:12:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 2794 transitions, 50159 flow, removed 7501 selfloop flow, removed 108 redundant places. [2022-01-19 09:12:38,165 INFO L242 Difference]: Finished difference. Result has 562 places, 2633 transitions, 49434 flow [2022-01-19 09:12:38,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=36307, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=49434, PETRI_PLACES=562, PETRI_TRANSITIONS=2633} [2022-01-19 09:12:38,167 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 459 predicate places. [2022-01-19 09:12:38,167 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 2633 transitions, 49434 flow [2022-01-19 09:12:38,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.14285714285714) internal successors, (729), 7 states have internal predecessors, (729), 0 states have call successors, (0), 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 09:12:38,167 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:38,167 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:38,184 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 09:12:38,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:38,371 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -667568367, now seen corresponding path program 17 times [2022-01-19 09:12:38,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:38,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452586082] [2022-01-19 09:12:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:38,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-19 09:12:38,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452586082] [2022-01-19 09:12:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452586082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:38,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630937512] [2022-01-19 09:12:38,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:12:38,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:38,560 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 09:12:38,562 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 09:12:38,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-19 09:12:38,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 09:12:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:12:39,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:12:39,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630937512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:12:39,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:12:39,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-01-19 09:12:39,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413936501] [2022-01-19 09:12:39,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:12:39,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-19 09:12:39,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:12:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-19 09:12:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2022-01-19 09:12:39,815 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:12:39,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2633 transitions, 49434 flow. Second operand has 43 states, 43 states have (on average 88.3953488372093) internal successors, (3801), 43 states have internal predecessors, (3801), 0 states have call successors, (0), 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 09:12:39,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:12:39,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:12:39,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:12:48,726 INFO L129 PetriNetUnfolder]: 2669/18597 cut-off events. [2022-01-19 09:12:48,726 INFO L130 PetriNetUnfolder]: For 2515003/2519497 co-relation queries the response was YES. [2022-01-19 09:12:48,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148980 conditions, 18597 events. 2669/18597 cut-off events. For 2515003/2519497 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 287254 event pairs, 341 based on Foata normal form. 1388/18239 useless extension candidates. Maximal degree in co-relation 148821. Up to 3146 conditions per place. [2022-01-19 09:12:49,002 INFO L132 encePairwiseOnDemand]: 103/116 looper letters, 409 selfloop transitions, 63 changer transitions 1104/1677 dead transitions. [2022-01-19 09:12:49,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1677 transitions, 35317 flow [2022-01-19 09:12:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-19 09:12:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-01-19 09:12:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1956 transitions. [2022-01-19 09:12:49,004 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7664576802507836 [2022-01-19 09:12:49,004 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1956 transitions. [2022-01-19 09:12:49,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1956 transitions. [2022-01-19 09:12:49,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:12:49,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1956 transitions. [2022-01-19 09:12:49,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 88.9090909090909) internal successors, (1956), 22 states have internal predecessors, (1956), 0 states have call successors, (0), 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 09:12:49,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:12:49,009 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 116.0) internal successors, (2668), 23 states have internal predecessors, (2668), 0 states have call successors, (0), 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 09:12:49,009 INFO L186 Difference]: Start difference. First operand has 562 places, 2633 transitions, 49434 flow. Second operand 22 states and 1956 transitions. [2022-01-19 09:12:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1677 transitions, 35317 flow [2022-01-19 09:12:55,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1677 transitions, 34792 flow, removed 117 selfloop flow, removed 26 redundant places. [2022-01-19 09:12:55,526 INFO L242 Difference]: Finished difference. Result has 490 places, 565 transitions, 11339 flow [2022-01-19 09:12:55,527 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=29806, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11339, PETRI_PLACES=490, PETRI_TRANSITIONS=565} [2022-01-19 09:12:55,527 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 387 predicate places. [2022-01-19 09:12:55,527 INFO L470 AbstractCegarLoop]: Abstraction has has 490 places, 565 transitions, 11339 flow [2022-01-19 09:12:55,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 88.3953488372093) internal successors, (3801), 43 states have internal predecessors, (3801), 0 states have call successors, (0), 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 09:12:55,528 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:12:55,528 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:12:55,545 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 09:12:55,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:55,729 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:12:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:12:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1420353594, now seen corresponding path program 18 times [2022-01-19 09:12:55,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:12:55,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491292241] [2022-01-19 09:12:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:12:55,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:12:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:12:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:12:56,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:12:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491292241] [2022-01-19 09:12:56,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491292241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:12:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274585877] [2022-01-19 09:12:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:12:56,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:12:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:12:56,123 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 09:12:56,124 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 09:12:56,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-19 09:12:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:12:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-19 09:12:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:12:56,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 09:12:56,574 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:12:56,574 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 11 treesize of output 11 [2022-01-19 09:12:57,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 09:12:57,463 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 09:12:57,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 09:12:57,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 09:12:57,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:12:57,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 10 [2022-01-19 09:12:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 09:12:57,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:12:59,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:12:59,376 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 64 treesize of output 52 [2022-01-19 09:12:59,385 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 09:12:59,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 156 treesize of output 141 [2022-01-19 09:12:59,396 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-19 09:12:59,397 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 136 treesize of output 104 [2022-01-19 09:12:59,404 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-19 09:12:59,404 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 83 treesize of output 67 [2022-01-19 09:13:00,303 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 10 treesize of output 8 [2022-01-19 09:13:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-19 09:13:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274585877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:00,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:00,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 31, 30] total 76 [2022-01-19 09:13:00,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543778432] [2022-01-19 09:13:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:00,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-19 09:13:00,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-19 09:13:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=4969, Unknown=64, NotChecked=0, Total=5700 [2022-01-19 09:13:00,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 09:13:00,371 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 565 transitions, 11339 flow. Second operand has 76 states, 76 states have (on average 48.55263157894737) internal successors, (3690), 76 states have internal predecessors, (3690), 0 states have call successors, (0), 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 09:13:00,371 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:00,371 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 09:13:00,371 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:05,025 INFO L129 PetriNetUnfolder]: 1681/9284 cut-off events. [2022-01-19 09:13:05,026 INFO L130 PetriNetUnfolder]: For 762758/763368 co-relation queries the response was YES. [2022-01-19 09:13:05,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70073 conditions, 9284 events. 1681/9284 cut-off events. For 762758/763368 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 118075 event pairs, 137 based on Foata normal form. 67/8437 useless extension candidates. Maximal degree in co-relation 69937. Up to 2727 conditions per place. [2022-01-19 09:13:05,152 INFO L132 encePairwiseOnDemand]: 84/116 looper letters, 554 selfloop transitions, 359 changer transitions 36/989 dead transitions. [2022-01-19 09:13:05,152 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 989 transitions, 25092 flow [2022-01-19 09:13:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-19 09:13:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-01-19 09:13:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3736 transitions. [2022-01-19 09:13:05,156 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42942528735632185 [2022-01-19 09:13:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3736 transitions. [2022-01-19 09:13:05,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3736 transitions. [2022-01-19 09:13:05,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3736 transitions. [2022-01-19 09:13:05,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 49.81333333333333) internal successors, (3736), 75 states have internal predecessors, (3736), 0 states have call successors, (0), 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 09:13:05,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 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 09:13:05,167 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 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 09:13:05,167 INFO L186 Difference]: Start difference. First operand has 490 places, 565 transitions, 11339 flow. Second operand 75 states and 3736 transitions. [2022-01-19 09:13:05,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 989 transitions, 25092 flow [2022-01-19 09:13:06,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 989 transitions, 19047 flow, removed 2191 selfloop flow, removed 87 redundant places. [2022-01-19 09:13:06,014 INFO L242 Difference]: Finished difference. Result has 384 places, 873 transitions, 17195 flow [2022-01-19 09:13:06,015 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=9927, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=17195, PETRI_PLACES=384, PETRI_TRANSITIONS=873} [2022-01-19 09:13:06,015 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 281 predicate places. [2022-01-19 09:13:06,015 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 873 transitions, 17195 flow [2022-01-19 09:13:06,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 48.55263157894737) internal successors, (3690), 76 states have internal predecessors, (3690), 0 states have call successors, (0), 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 09:13:06,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:06,016 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:06,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-19 09:13:06,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:06,217 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 584791968, now seen corresponding path program 19 times [2022-01-19 09:13:06,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:06,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917538511] [2022-01-19 09:13:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:06,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:06,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:06,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917538511] [2022-01-19 09:13:06,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917538511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:06,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388233245] [2022-01-19 09:13:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:13:06,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:06,628 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 09:13:06,631 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 09:13:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 09:13:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:07,421 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 15 treesize of output 7 [2022-01-19 09:13:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:13:07,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:07,577 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 09:13:07,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 13 [2022-01-19 09:13:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 09:13:07,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388233245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:07,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:07,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 13] total 37 [2022-01-19 09:13:07,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474136563] [2022-01-19 09:13:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:07,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-19 09:13:07,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-19 09:13:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-01-19 09:13:07,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 09:13:07,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 873 transitions, 17195 flow. Second operand has 37 states, 37 states have (on average 63.189189189189186) internal successors, (2338), 37 states have internal predecessors, (2338), 0 states have call successors, (0), 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 09:13:07,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:07,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 09:13:07,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:12,966 INFO L129 PetriNetUnfolder]: 2063/10989 cut-off events. [2022-01-19 09:13:12,966 INFO L130 PetriNetUnfolder]: For 216275/216892 co-relation queries the response was YES. [2022-01-19 09:13:13,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56292 conditions, 10989 events. 2063/10989 cut-off events. For 216275/216892 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 142192 event pairs, 3 based on Foata normal form. 227/10210 useless extension candidates. Maximal degree in co-relation 56191. Up to 2527 conditions per place. [2022-01-19 09:13:13,212 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 499 selfloop transitions, 751 changer transitions 177/1477 dead transitions. [2022-01-19 09:13:13,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1477 transitions, 32857 flow [2022-01-19 09:13:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-19 09:13:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-01-19 09:13:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 7467 transitions. [2022-01-19 09:13:13,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5549197384066588 [2022-01-19 09:13:13,218 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 7467 transitions. [2022-01-19 09:13:13,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 7467 transitions. [2022-01-19 09:13:13,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:13,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 7467 transitions. [2022-01-19 09:13:13,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 64.37068965517241) internal successors, (7467), 116 states have internal predecessors, (7467), 0 states have call successors, (0), 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 09:13:13,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 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 09:13:13,238 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 116.0) internal successors, (13572), 117 states have internal predecessors, (13572), 0 states have call successors, (0), 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 09:13:13,238 INFO L186 Difference]: Start difference. First operand has 384 places, 873 transitions, 17195 flow. Second operand 116 states and 7467 transitions. [2022-01-19 09:13:13,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1477 transitions, 32857 flow [2022-01-19 09:13:13,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1477 transitions, 30274 flow, removed 1216 selfloop flow, removed 34 redundant places. [2022-01-19 09:13:13,817 INFO L242 Difference]: Finished difference. Result has 509 places, 998 transitions, 21117 flow [2022-01-19 09:13:13,818 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=15899, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=21117, PETRI_PLACES=509, PETRI_TRANSITIONS=998} [2022-01-19 09:13:13,819 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 406 predicate places. [2022-01-19 09:13:13,819 INFO L470 AbstractCegarLoop]: Abstraction has has 509 places, 998 transitions, 21117 flow [2022-01-19 09:13:13,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 63.189189189189186) internal successors, (2338), 37 states have internal predecessors, (2338), 0 states have call successors, (0), 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 09:13:13,819 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:13,820 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:13,836 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 09:13:14,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:14,022 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash 783371322, now seen corresponding path program 20 times [2022-01-19 09:13:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:14,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189918605] [2022-01-19 09:13:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:14,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:13:14,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189918605] [2022-01-19 09:13:14,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189918605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304791000] [2022-01-19 09:13:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:13:14,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:14,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:14,630 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 09:13:14,630 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 09:13:14,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:13:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:13:14,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-19 09:13:14,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:13:15,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:13:15,777 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 09:13:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:13:15,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:16,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_647 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_647) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2022-01-19 09:13:16,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:13:16,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 47 [2022-01-19 09:13:16,051 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 14 treesize of output 7 [2022-01-19 09:13:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 09:13:16,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304791000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:16,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:16,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 20] total 63 [2022-01-19 09:13:16,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870242690] [2022-01-19 09:13:16,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:16,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-19 09:13:16,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-19 09:13:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3523, Unknown=1, NotChecked=120, Total=3906 [2022-01-19 09:13:16,588 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-01-19 09:13:16,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 998 transitions, 21117 flow. Second operand has 63 states, 63 states have (on average 53.74603174603175) internal successors, (3386), 63 states have internal predecessors, (3386), 0 states have call successors, (0), 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 09:13:16,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:16,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-01-19 09:13:16,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:22,572 INFO L129 PetriNetUnfolder]: 2544/12707 cut-off events. [2022-01-19 09:13:22,572 INFO L130 PetriNetUnfolder]: For 291560/293013 co-relation queries the response was YES. [2022-01-19 09:13:22,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 12707 events. 2544/12707 cut-off events. For 291560/293013 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 164830 event pairs, 1 based on Foata normal form. 357/11856 useless extension candidates. Maximal degree in co-relation 68095. Up to 2896 conditions per place. [2022-01-19 09:13:22,746 INFO L132 encePairwiseOnDemand]: 94/116 looper letters, 386 selfloop transitions, 922 changer transitions 57/1409 dead transitions. [2022-01-19 09:13:22,747 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1409 transitions, 32664 flow [2022-01-19 09:13:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-19 09:13:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-01-19 09:13:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2939 transitions. [2022-01-19 09:13:22,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4780416395575797 [2022-01-19 09:13:22,749 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2939 transitions. [2022-01-19 09:13:22,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2939 transitions. [2022-01-19 09:13:22,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:22,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2939 transitions. [2022-01-19 09:13:22,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 55.45283018867924) internal successors, (2939), 53 states have internal predecessors, (2939), 0 states have call successors, (0), 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 09:13:22,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 116.0) internal successors, (6264), 54 states have internal predecessors, (6264), 0 states have call successors, (0), 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 09:13:22,757 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 116.0) internal successors, (6264), 54 states have internal predecessors, (6264), 0 states have call successors, (0), 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 09:13:22,757 INFO L186 Difference]: Start difference. First operand has 509 places, 998 transitions, 21117 flow. Second operand 53 states and 2939 transitions. [2022-01-19 09:13:22,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1409 transitions, 32664 flow [2022-01-19 09:13:23,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1409 transitions, 30969 flow, removed 254 selfloop flow, removed 71 redundant places. [2022-01-19 09:13:23,816 INFO L242 Difference]: Finished difference. Result has 463 places, 1170 transitions, 26123 flow [2022-01-19 09:13:23,817 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=19563, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=750, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=26123, PETRI_PLACES=463, PETRI_TRANSITIONS=1170} [2022-01-19 09:13:23,817 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 360 predicate places. [2022-01-19 09:13:23,817 INFO L470 AbstractCegarLoop]: Abstraction has has 463 places, 1170 transitions, 26123 flow [2022-01-19 09:13:23,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 53.74603174603175) internal successors, (3386), 63 states have internal predecessors, (3386), 0 states have call successors, (0), 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 09:13:23,818 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:23,818 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:23,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-19 09:13:24,031 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,SelfDestructingSolverStorable23 [2022-01-19 09:13:24,031 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 233378092, now seen corresponding path program 21 times [2022-01-19 09:13:24,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:24,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046701751] [2022-01-19 09:13:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:24,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-19 09:13:24,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:24,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046701751] [2022-01-19 09:13:24,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046701751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:24,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982235725] [2022-01-19 09:13:24,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:13:24,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:24,100 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 09:13:24,110 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 09:13:24,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-19 09:13:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:13:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-19 09:13:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:25,510 INFO L353 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2022-01-19 09:13:25,510 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2022-01-19 09:13:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 73 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:13:25,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:25,896 INFO L353 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2022-01-19 09:13:25,896 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 36 [2022-01-19 09:13:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 93 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-19 09:13:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982235725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:27,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:27,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 50 [2022-01-19 09:13:27,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214538402] [2022-01-19 09:13:27,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:27,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-19 09:13:27,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-19 09:13:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2022-01-19 09:13:27,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-01-19 09:13:27,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1170 transitions, 26123 flow. Second operand has 50 states, 50 states have (on average 66.28) internal successors, (3314), 50 states have internal predecessors, (3314), 0 states have call successors, (0), 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 09:13:27,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:27,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-01-19 09:13:27,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:13:44,170 INFO L129 PetriNetUnfolder]: 7742/40063 cut-off events. [2022-01-19 09:13:44,170 INFO L130 PetriNetUnfolder]: For 1174737/1179668 co-relation queries the response was YES. [2022-01-19 09:13:45,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232946 conditions, 40063 events. 7742/40063 cut-off events. For 1174737/1179668 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 630521 event pairs, 125 based on Foata normal form. 853/37298 useless extension candidates. Maximal degree in co-relation 232839. Up to 9634 conditions per place. [2022-01-19 09:13:45,117 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 715 selfloop transitions, 1517 changer transitions 1640/3928 dead transitions. [2022-01-19 09:13:45,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 3928 transitions, 101117 flow [2022-01-19 09:13:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-01-19 09:13:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2022-01-19 09:13:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 11801 transitions. [2022-01-19 09:13:45,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5846710265556877 [2022-01-19 09:13:45,124 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 11801 transitions. [2022-01-19 09:13:45,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 11801 transitions. [2022-01-19 09:13:45,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:13:45,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 11801 transitions. [2022-01-19 09:13:45,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 67.82183908045977) internal successors, (11801), 174 states have internal predecessors, (11801), 0 states have call successors, (0), 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 09:13:45,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 116.0) internal successors, (20300), 175 states have internal predecessors, (20300), 0 states have call successors, (0), 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 09:13:45,150 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 116.0) internal successors, (20300), 175 states have internal predecessors, (20300), 0 states have call successors, (0), 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 09:13:45,151 INFO L186 Difference]: Start difference. First operand has 463 places, 1170 transitions, 26123 flow. Second operand 174 states and 11801 transitions. [2022-01-19 09:13:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 3928 transitions, 101117 flow [2022-01-19 09:13:50,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 3928 transitions, 95472 flow, removed 1985 selfloop flow, removed 32 redundant places. [2022-01-19 09:13:50,888 INFO L242 Difference]: Finished difference. Result has 702 places, 2020 transitions, 52202 flow [2022-01-19 09:13:50,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=24422, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=52202, PETRI_PLACES=702, PETRI_TRANSITIONS=2020} [2022-01-19 09:13:50,890 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 599 predicate places. [2022-01-19 09:13:50,890 INFO L470 AbstractCegarLoop]: Abstraction has has 702 places, 2020 transitions, 52202 flow [2022-01-19 09:13:50,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 66.28) internal successors, (3314), 50 states have internal predecessors, (3314), 0 states have call successors, (0), 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 09:13:50,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:13:50,891 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:13:50,917 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 09:13:51,103 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,SelfDestructingSolverStorable24 [2022-01-19 09:13:51,103 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:13:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:13:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 249619902, now seen corresponding path program 22 times [2022-01-19 09:13:51,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:13:51,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437907005] [2022-01-19 09:13:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:13:51,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:13:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:13:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 09:13:51,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:13:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437907005] [2022-01-19 09:13:51,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437907005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:13:51,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965087222] [2022-01-19 09:13:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-19 09:13:51,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:13:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:13:51,395 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 09:13:51,396 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 09:13:51,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-19 09:13:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:13:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-19 09:13:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:13:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 09:13:52,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:13:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-19 09:13:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965087222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:13:53,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:13:53,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-01-19 09:13:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963047530] [2022-01-19 09:13:53,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:13:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-19 09:13:53,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:13:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-19 09:13:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2396, Unknown=0, NotChecked=0, Total=2970 [2022-01-19 09:13:53,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:13:53,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 2020 transitions, 52202 flow. Second operand has 55 states, 55 states have (on average 88.16363636363636) internal successors, (4849), 55 states have internal predecessors, (4849), 0 states have call successors, (0), 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 09:13:53,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:13:53,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:13:53,007 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:14:02,858 INFO L129 PetriNetUnfolder]: 3191/20105 cut-off events. [2022-01-19 09:14:02,858 INFO L130 PetriNetUnfolder]: For 602628/604867 co-relation queries the response was YES. [2022-01-19 09:14:03,192 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115860 conditions, 20105 events. 3191/20105 cut-off events. For 602628/604867 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 288436 event pairs, 452 based on Foata normal form. 322/18500 useless extension candidates. Maximal degree in co-relation 115657. Up to 4683 conditions per place. [2022-01-19 09:14:03,252 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 1097 selfloop transitions, 90 changer transitions 410/1722 dead transitions. [2022-01-19 09:14:03,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 1722 transitions, 46910 flow [2022-01-19 09:14:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-19 09:14:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-01-19 09:14:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3372 transitions. [2022-01-19 09:14:03,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76497277676951 [2022-01-19 09:14:03,255 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3372 transitions. [2022-01-19 09:14:03,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3372 transitions. [2022-01-19 09:14:03,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:14:03,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3372 transitions. [2022-01-19 09:14:03,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 88.73684210526316) internal successors, (3372), 38 states have internal predecessors, (3372), 0 states have call successors, (0), 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 09:14:03,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 116.0) internal successors, (4524), 39 states have internal predecessors, (4524), 0 states have call successors, (0), 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 09:14:03,262 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 116.0) internal successors, (4524), 39 states have internal predecessors, (4524), 0 states have call successors, (0), 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 09:14:03,262 INFO L186 Difference]: Start difference. First operand has 702 places, 2020 transitions, 52202 flow. Second operand 38 states and 3372 transitions. [2022-01-19 09:14:03,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 1722 transitions, 46910 flow [2022-01-19 09:14:06,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1722 transitions, 45264 flow, removed 584 selfloop flow, removed 113 redundant places. [2022-01-19 09:14:06,514 INFO L242 Difference]: Finished difference. Result has 539 places, 1304 transitions, 32714 flow [2022-01-19 09:14:06,515 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=39737, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=32714, PETRI_PLACES=539, PETRI_TRANSITIONS=1304} [2022-01-19 09:14:06,516 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 436 predicate places. [2022-01-19 09:14:06,516 INFO L470 AbstractCegarLoop]: Abstraction has has 539 places, 1304 transitions, 32714 flow [2022-01-19 09:14:06,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 88.16363636363636) internal successors, (4849), 55 states have internal predecessors, (4849), 0 states have call successors, (0), 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 09:14:06,517 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:14:06,517 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:14:06,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-19 09:14:06,717 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,SelfDestructingSolverStorable25 [2022-01-19 09:14:06,717 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:14:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:14:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1665050755, now seen corresponding path program 23 times [2022-01-19 09:14:06,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:14:06,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476008706] [2022-01-19 09:14:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:14:06,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:14:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:07,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:14:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476008706] [2022-01-19 09:14:07,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476008706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:14:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539152976] [2022-01-19 09:14:07,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-19 09:14:07,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:14:07,280 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 09:14:07,281 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 09:14:07,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-19 09:14:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:14:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-19 09:14:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:14:08,153 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 09:14:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-19 09:14:08,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:14:08,344 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-01-19 09:14:08,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 13 [2022-01-19 09:14:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:14:08,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539152976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:14:08,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:14:08,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 15] total 57 [2022-01-19 09:14:08,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717028096] [2022-01-19 09:14:08,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:14:08,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-19 09:14:08,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:14:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-19 09:14:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2022-01-19 09:14:08,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-01-19 09:14:08,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1304 transitions, 32714 flow. Second operand has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 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 09:14:08,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:14:08,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-01-19 09:14:08,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:14:20,348 INFO L129 PetriNetUnfolder]: 4022/20719 cut-off events. [2022-01-19 09:14:20,348 INFO L130 PetriNetUnfolder]: For 605166/605691 co-relation queries the response was YES. [2022-01-19 09:14:20,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125278 conditions, 20719 events. 4022/20719 cut-off events. For 605166/605691 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 292751 event pairs, 4 based on Foata normal form. 128/19056 useless extension candidates. Maximal degree in co-relation 125151. Up to 4949 conditions per place. [2022-01-19 09:14:20,626 INFO L132 encePairwiseOnDemand]: 96/116 looper letters, 424 selfloop transitions, 1318 changer transitions 236/2028 dead transitions. [2022-01-19 09:14:20,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 2028 transitions, 53839 flow [2022-01-19 09:14:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-19 09:14:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2022-01-19 09:14:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 10195 transitions. [2022-01-19 09:14:20,635 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5562527280663466 [2022-01-19 09:14:20,635 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 10195 transitions. [2022-01-19 09:14:20,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 10195 transitions. [2022-01-19 09:14:20,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:14:20,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 10195 transitions. [2022-01-19 09:14:20,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 64.5253164556962) internal successors, (10195), 158 states have internal predecessors, (10195), 0 states have call successors, (0), 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 09:14:20,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 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 09:14:20,665 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 116.0) internal successors, (18444), 159 states have internal predecessors, (18444), 0 states have call successors, (0), 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 09:14:20,665 INFO L186 Difference]: Start difference. First operand has 539 places, 1304 transitions, 32714 flow. Second operand 158 states and 10195 transitions. [2022-01-19 09:14:20,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 2028 transitions, 53839 flow [2022-01-19 09:14:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 2028 transitions, 51672 flow, removed 987 selfloop flow, removed 46 redundant places. [2022-01-19 09:14:22,835 INFO L242 Difference]: Finished difference. Result has 651 places, 1492 transitions, 41465 flow [2022-01-19 09:14:22,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=31941, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=41465, PETRI_PLACES=651, PETRI_TRANSITIONS=1492} [2022-01-19 09:14:22,837 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 548 predicate places. [2022-01-19 09:14:22,837 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 1492 transitions, 41465 flow [2022-01-19 09:14:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 62.85964912280702) internal successors, (3583), 57 states have internal predecessors, (3583), 0 states have call successors, (0), 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 09:14:22,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:14:22,837 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:14:22,856 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 09:14:23,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:23,047 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:14:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:14:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2021594383, now seen corresponding path program 24 times [2022-01-19 09:14:23,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:14:23,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887155901] [2022-01-19 09:14:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:14:23,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:14:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-19 09:14:23,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:14:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887155901] [2022-01-19 09:14:23,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887155901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:14:23,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465388561] [2022-01-19 09:14:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-19 09:14:23,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:14:23,704 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 09:14:23,704 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 09:14:24,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-19 09:14:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:14:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-19 09:14:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:14:24,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 09:14:24,316 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-19 09:14:24,316 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 11 treesize of output 11 [2022-01-19 09:14:24,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-01-19 09:14:24,858 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 23 treesize of output 7 [2022-01-19 09:14:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:14:24,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:14:24,946 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_801 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_801) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2022-01-19 09:14:24,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:14:24,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 47 [2022-01-19 09:14:24,970 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 14 treesize of output 7 [2022-01-19 09:14:25,506 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 10 treesize of output 8 [2022-01-19 09:14:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:14:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465388561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:14:25,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:14:25,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 22] total 51 [2022-01-19 09:14:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809421561] [2022-01-19 09:14:25,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:14:25,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-19 09:14:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:14:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-19 09:14:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2258, Unknown=1, NotChecked=96, Total=2550 [2022-01-19 09:14:25,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-01-19 09:14:25,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1492 transitions, 41465 flow. Second operand has 51 states, 51 states have (on average 53.78431372549019) internal successors, (2743), 51 states have internal predecessors, (2743), 0 states have call successors, (0), 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 09:14:25,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:14:25,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-01-19 09:14:25,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:14:45,156 INFO L129 PetriNetUnfolder]: 7524/40520 cut-off events. [2022-01-19 09:14:45,156 INFO L130 PetriNetUnfolder]: For 1087924/1091988 co-relation queries the response was YES. [2022-01-19 09:14:46,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237617 conditions, 40520 events. 7524/40520 cut-off events. For 1087924/1091988 co-relation queries the response was YES. Maximal size of possible extension queue 1922. Compared 643794 event pairs, 160 based on Foata normal form. 428/37408 useless extension candidates. Maximal degree in co-relation 237450. Up to 9642 conditions per place. [2022-01-19 09:14:46,712 INFO L132 encePairwiseOnDemand]: 92/116 looper letters, 603 selfloop transitions, 2128 changer transitions 69/2844 dead transitions. [2022-01-19 09:14:46,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 2844 transitions, 85945 flow [2022-01-19 09:14:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-19 09:14:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-01-19 09:14:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3888 transitions. [2022-01-19 09:14:46,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47881773399014776 [2022-01-19 09:14:46,715 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3888 transitions. [2022-01-19 09:14:46,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3888 transitions. [2022-01-19 09:14:46,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:14:46,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3888 transitions. [2022-01-19 09:14:46,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.542857142857144) internal successors, (3888), 70 states have internal predecessors, (3888), 0 states have call successors, (0), 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 09:14:46,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 116.0) internal successors, (8236), 71 states have internal predecessors, (8236), 0 states have call successors, (0), 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 09:14:46,722 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 116.0) internal successors, (8236), 71 states have internal predecessors, (8236), 0 states have call successors, (0), 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 09:14:46,722 INFO L186 Difference]: Start difference. First operand has 651 places, 1492 transitions, 41465 flow. Second operand 70 states and 3888 transitions. [2022-01-19 09:14:46,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 2844 transitions, 85945 flow [2022-01-19 09:14:51,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 2844 transitions, 84556 flow, removed 454 selfloop flow, removed 84 redundant places. [2022-01-19 09:14:51,851 INFO L242 Difference]: Finished difference. Result has 613 places, 2615 transitions, 81307 flow [2022-01-19 09:14:51,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=40725, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=81307, PETRI_PLACES=613, PETRI_TRANSITIONS=2615} [2022-01-19 09:14:51,853 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 510 predicate places. [2022-01-19 09:14:51,853 INFO L470 AbstractCegarLoop]: Abstraction has has 613 places, 2615 transitions, 81307 flow [2022-01-19 09:14:51,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 53.78431372549019) internal successors, (2743), 51 states have internal predecessors, (2743), 0 states have call successors, (0), 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 09:14:51,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:14:51,854 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:14:51,878 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 09:14:52,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-19 09:14:52,078 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:14:52,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:14:52,078 INFO L85 PathProgramCache]: Analyzing trace with hash 8200013, now seen corresponding path program 25 times [2022-01-19 09:14:52,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:14:52,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182981266] [2022-01-19 09:14:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:14:52,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:14:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 09:14:52,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:14:52,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182981266] [2022-01-19 09:14:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182981266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:14:52,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656000452] [2022-01-19 09:14:52,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-19 09:14:52,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:14:52,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:14:52,386 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 09:14:52,387 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 09:14:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:14:52,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-19 09:14:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:14:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 60 proven. 75 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 09:14:53,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:14:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-19 09:14:54,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656000452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:14:54,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:14:54,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2022-01-19 09:14:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956665826] [2022-01-19 09:14:54,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:14:54,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-19 09:14:54,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:14:54,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-19 09:14:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=3272, Unknown=0, NotChecked=0, Total=4032 [2022-01-19 09:14:54,223 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-01-19 09:14:54,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 2615 transitions, 81307 flow. Second operand has 64 states, 64 states have (on average 88.140625) internal successors, (5641), 64 states have internal predecessors, (5641), 0 states have call successors, (0), 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 09:14:54,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:14:54,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-01-19 09:14:54,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:15:18,329 INFO L129 PetriNetUnfolder]: 6978/45617 cut-off events. [2022-01-19 09:15:18,329 INFO L130 PetriNetUnfolder]: For 1406143/1412490 co-relation queries the response was YES. [2022-01-19 09:15:19,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 271277 conditions, 45617 events. 6978/45617 cut-off events. For 1406143/1412490 co-relation queries the response was YES. Maximal size of possible extension queue 1908. Compared 751736 event pairs, 534 based on Foata normal form. 736/42013 useless extension candidates. Maximal degree in co-relation 271137. Up to 10624 conditions per place. [2022-01-19 09:15:19,865 INFO L132 encePairwiseOnDemand]: 102/116 looper letters, 2383 selfloop transitions, 270 changer transitions 601/3393 dead transitions. [2022-01-19 09:15:19,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 3393 transitions, 111551 flow [2022-01-19 09:15:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-19 09:15:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-01-19 09:15:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4175 transitions. [2022-01-19 09:15:19,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7657740278796772 [2022-01-19 09:15:19,867 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4175 transitions. [2022-01-19 09:15:19,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4175 transitions. [2022-01-19 09:15:19,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:15:19,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4175 transitions. [2022-01-19 09:15:19,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 88.82978723404256) internal successors, (4175), 47 states have internal predecessors, (4175), 0 states have call successors, (0), 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 09:15:19,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 116.0) internal successors, (5568), 48 states have internal predecessors, (5568), 0 states have call successors, (0), 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 09:15:19,873 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 116.0) internal successors, (5568), 48 states have internal predecessors, (5568), 0 states have call successors, (0), 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 09:15:19,873 INFO L186 Difference]: Start difference. First operand has 613 places, 2615 transitions, 81307 flow. Second operand 47 states and 4175 transitions. [2022-01-19 09:15:19,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 3393 transitions, 111551 flow [2022-01-19 09:15:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 3393 transitions, 105563 flow, removed 2278 selfloop flow, removed 36 redundant places. [2022-01-19 09:15:27,385 INFO L242 Difference]: Finished difference. Result has 645 places, 2755 transitions, 82037 flow [2022-01-19 09:15:27,388 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=75989, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=82037, PETRI_PLACES=645, PETRI_TRANSITIONS=2755} [2022-01-19 09:15:27,388 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 542 predicate places. [2022-01-19 09:15:27,389 INFO L470 AbstractCegarLoop]: Abstraction has has 645 places, 2755 transitions, 82037 flow [2022-01-19 09:15:27,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 88.140625) internal successors, (5641), 64 states have internal predecessors, (5641), 0 states have call successors, (0), 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 09:15:27,389 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:15:27,390 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:15:27,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-19 09:15:27,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-19 09:15:27,614 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:15:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:15:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -679873953, now seen corresponding path program 26 times [2022-01-19 09:15:27,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:15:27,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564937577] [2022-01-19 09:15:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:15:27,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:15:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:15:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:15:27,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:15:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564937577] [2022-01-19 09:15:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564937577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:15:27,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554190412] [2022-01-19 09:15:27,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-19 09:15:27,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:15:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:15:27,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:15:27,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-19 09:15:27,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-19 09:15:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:15:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-19 09:15:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:15:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:15:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:15:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-19 09:15:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554190412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:15:28,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:15:28,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-01-19 09:15:28,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637359220] [2022-01-19 09:15:28,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:15:28,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-19 09:15:28,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:15:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-19 09:15:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-19 09:15:28,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-01-19 09:15:28,242 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 2755 transitions, 82037 flow. Second operand has 9 states, 9 states have (on average 104.11111111111111) internal successors, (937), 9 states have internal predecessors, (937), 0 states have call successors, (0), 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 09:15:28,242 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:15:28,242 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-01-19 09:15:28,242 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-19 09:15:57,315 INFO L129 PetriNetUnfolder]: 8680/54481 cut-off events. [2022-01-19 09:15:57,315 INFO L130 PetriNetUnfolder]: For 1825962/1829432 co-relation queries the response was YES. [2022-01-19 09:15:59,256 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336009 conditions, 54481 events. 8680/54481 cut-off events. For 1825962/1829432 co-relation queries the response was YES. Maximal size of possible extension queue 2929. Compared 931934 event pairs, 373 based on Foata normal form. 569/50377 useless extension candidates. Maximal degree in co-relation 335851. Up to 12376 conditions per place. [2022-01-19 09:15:59,480 INFO L132 encePairwiseOnDemand]: 113/116 looper letters, 873 selfloop transitions, 2271 changer transitions 309/3630 dead transitions. [2022-01-19 09:15:59,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 3630 transitions, 115055 flow [2022-01-19 09:15:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-19 09:15:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-19 09:15:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 853 transitions. [2022-01-19 09:15:59,482 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9191810344827587 [2022-01-19 09:15:59,482 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 853 transitions. [2022-01-19 09:15:59,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 853 transitions. [2022-01-19 09:15:59,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-19 09:15:59,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 853 transitions. [2022-01-19 09:15:59,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.625) internal successors, (853), 8 states have internal predecessors, (853), 0 states have call successors, (0), 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 09:15:59,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 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 09:15:59,483 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 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 09:15:59,483 INFO L186 Difference]: Start difference. First operand has 645 places, 2755 transitions, 82037 flow. Second operand 8 states and 853 transitions. [2022-01-19 09:15:59,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 3630 transitions, 115055 flow [2022-01-19 09:16:09,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 3630 transitions, 113490 flow, removed 761 selfloop flow, removed 29 redundant places. [2022-01-19 09:16:09,775 INFO L242 Difference]: Finished difference. Result has 618 places, 3304 transitions, 106821 flow [2022-01-19 09:16:09,777 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=80472, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=106821, PETRI_PLACES=618, PETRI_TRANSITIONS=3304} [2022-01-19 09:16:09,778 INFO L334 CegarLoopForPetriNet]: 103 programPoint places, 515 predicate places. [2022-01-19 09:16:09,778 INFO L470 AbstractCegarLoop]: Abstraction has has 618 places, 3304 transitions, 106821 flow [2022-01-19 09:16:09,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 104.11111111111111) internal successors, (937), 9 states have internal predecessors, (937), 0 states have call successors, (0), 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 09:16:09,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-19 09:16:09,778 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:16:09,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-19 09:16:09,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:16:09,987 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-19 09:16:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-19 09:16:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash 325911152, now seen corresponding path program 27 times [2022-01-19 09:16:09,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-19 09:16:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098255411] [2022-01-19 09:16:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-19 09:16:09,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-19 09:16:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-19 09:16:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-19 09:16:10,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-19 09:16:10,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098255411] [2022-01-19 09:16:10,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098255411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-19 09:16:10,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955377500] [2022-01-19 09:16:10,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-19 09:16:10,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-19 09:16:10,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-19 09:16:10,623 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-19 09:16:10,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-19 09:16:11,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-19 09:16:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-19 09:16:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 89 conjunts are in the unsatisfiable core [2022-01-19 09:16:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-19 09:16:12,114 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 09:16:12,440 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 09:16:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-19 09:16:12,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-01-19 09:16:13,282 INFO L353 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2022-01-19 09:16:13,282 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2022-01-19 09:16:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-19 09:16:13,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-19 09:16:15,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-19 09:16:15,990 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 95 treesize of output 71 [2022-01-19 09:16:16,019 INFO L353 Elim1Store]: treesize reduction 49, result has 24.6 percent of original size [2022-01-19 09:16:16,020 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 198 treesize of output 181 [2022-01-19 09:16:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-19 09:16:16,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 105 [2022-01-19 09:16:16,043 INFO L353 Elim1Store]: treesize reduction 55, result has 15.4 percent of original size [2022-01-19 09:16:16,043 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 95 [2022-01-19 09:16:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 1 proven. 166 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-19 09:16:17,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955377500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-19 09:16:17,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-19 09:16:17,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37, 37] total 95 [2022-01-19 09:16:17,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194007784] [2022-01-19 09:16:17,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-19 09:16:17,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-19 09:16:17,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-19 09:16:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-19 09:16:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=8152, Unknown=21, NotChecked=0, Total=8930 [2022-01-19 09:16:17,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 116 [2022-01-19 09:16:17,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 3304 transitions, 106821 flow. Second operand has 95 states, 95 states have (on average 48.45263157894737) internal successors, (4603), 95 states have internal predecessors, (4603), 0 states have call successors, (0), 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 09:16:17,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-19 09:16:17,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 116 [2022-01-19 09:16:17,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand