./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-chromosome-opt-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-chromosome-opt-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:46:29,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:46:29,675 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:46:29,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:46:29,680 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:46:29,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:46:29,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:46:29,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:46:29,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:46:29,705 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:46:29,705 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:46:29,706 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:46:29,706 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:46:29,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:46:29,707 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:46:29,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:46:29,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:46:29,708 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:46:29,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:46:29,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:46:29,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:46:29,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:46:29,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:46:29,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:46:29,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:46:29,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:46:29,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:46:29,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:46:29,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:46:29,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:46:29,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:46:29,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:46:29,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:29,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:46:29,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:46:29,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:46:29,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:46:29,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:46:29,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:46:29,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:46:29,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:46:29,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:46:29,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:46:29,715 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:46:29,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:46:29,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:46:29,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:46:29,936 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:46:29,937 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:46:29,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-chromosome-opt-symm.wvr.yml/witness.yml [2024-01-31 16:46:30,150 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:46:30,151 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:46:30,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-01-31 16:46:31,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:46:31,310 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:46:31,310 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-01-31 16:46:31,316 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4309cefab/d7813a47f604465bb75cc2f5bbfd5aec/FLAGa10115c87 [2024-01-31 16:46:31,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4309cefab/d7813a47f604465bb75cc2f5bbfd5aec [2024-01-31 16:46:31,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:46:31,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:46:31,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:31,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:46:31,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:46:31,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:30" (1/2) ... [2024-01-31 16:46:31,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcde8da and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:31, skipping insertion in model container [2024-01-31 16:46:31,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:30" (1/2) ... [2024-01-31 16:46:31,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74ddd81b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:31, skipping insertion in model container [2024-01-31 16:46:31,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:31" (2/2) ... [2024-01-31 16:46:31,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcde8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31, skipping insertion in model container [2024-01-31 16:46:31,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:31" (2/2) ... [2024-01-31 16:46:31,343 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:46:31,420 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:46:31,421 INFO L98 nessWitnessExtractor]: Location invariant after [L63-L63] (((((4294967296LL + (long long )comp) + (long long )i >= 0LL) && ((4294967295LL - (long long )comp) + (long long )i >= 0LL)) && ((4294967295LL + (long long )comp) - (long long )i >= 0LL)) && ((4294967294LL - (long long )comp) - (long long )i >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:46:31,421 INFO L98 nessWitnessExtractor]: Location invariant after [L47-L47] (((((4294967296LL + (long long )comp) + (long long )i >= 0LL) && ((4294967295LL - (long long )comp) + (long long )i >= 0LL)) && ((4294967295LL + (long long )comp) - (long long )i >= 0LL)) && ((4294967294LL - (long long )comp) - (long long )i >= 0LL)) && ((unsigned long )_argptr == 0UL) [2024-01-31 16:46:31,437 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:46:31,581 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-01-31 16:46:31,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:31,599 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:46:31,613 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:31,618 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:31,630 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-01-31 16:46:31,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:31,649 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:46:31,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31 WrapperNode [2024-01-31 16:46:31,650 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:31,651 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:31,651 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:46:31,651 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:46:31,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,694 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 181 [2024-01-31 16:46:31,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:31,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:46:31,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:46:31,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:46:31,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,744 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 2, 10, 2]. 63 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-31 16:46:31,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:46:31,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:46:31,772 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:46:31,772 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:46:31,772 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (1/1) ... [2024-01-31 16:46:31,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:31,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:46:31,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:46:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:46:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:46:31,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:46:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:46:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:46:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:46:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:46:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:46:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:46:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:46:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:46:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:46:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:46:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:46:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:46:31,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:46:31,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:46:31,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:46:31,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:46:31,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:46:31,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:46:31,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:46:31,884 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:46:31,982 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:46:31,984 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:46:32,208 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:46:32,209 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:46:32,368 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:46:32,368 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:46:32,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:32 BoogieIcfgContainer [2024-01-31 16:46:32,369 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:46:32,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:46:32,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:46:32,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:46:32,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:30" (1/4) ... [2024-01-31 16:46:32,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd36474 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:32, skipping insertion in model container [2024-01-31 16:46:32,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:31" (2/4) ... [2024-01-31 16:46:32,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd36474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:32, skipping insertion in model container [2024-01-31 16:46:32,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:31" (3/4) ... [2024-01-31 16:46:32,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd36474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:32, skipping insertion in model container [2024-01-31 16:46:32,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:32" (4/4) ... [2024-01-31 16:46:32,375 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-01-31 16:46:32,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:46:32,389 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:46:32,389 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:46:32,422 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:46:32,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-01-31 16:46:32,487 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-01-31 16:46:32,487 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:32,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-01-31 16:46:32,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-01-31 16:46:32,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-01-31 16:46:32,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:46:32,502 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17f0334, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:46:32,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:46:32,509 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:46:32,509 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-01-31 16:46:32,509 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:32,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:32,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:32,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:32,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:32,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1337970255, now seen corresponding path program 1 times [2024-01-31 16:46:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198856400] [2024-01-31 16:46:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:32,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:32,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198856400] [2024-01-31 16:46:32,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198856400] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:32,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:32,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063517847] [2024-01-31 16:46:32,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:32,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:32,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:32,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:32,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:32,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:32,969 INFO L124 PetriNetUnfolderBase]: 232/386 cut-off events. [2024-01-31 16:46:32,970 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-31 16:46:32,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 386 events. 232/386 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1260 event pairs, 72 based on Foata normal form. 4/292 useless extension candidates. Maximal degree in co-relation 660. Up to 194 conditions per place. [2024-01-31 16:46:32,974 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 47 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 16:46:32,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 234 flow [2024-01-31 16:46:32,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-01-31 16:46:32,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2024-01-31 16:46:32,985 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 5 states and 68 transitions. [2024-01-31 16:46:32,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 234 flow [2024-01-31 16:46:32,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:32,989 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 80 flow [2024-01-31 16:46:32,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-01-31 16:46:32,993 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-01-31 16:46:32,994 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 80 flow [2024-01-31 16:46:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:32,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:46:32,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:32,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1652654709, now seen corresponding path program 2 times [2024-01-31 16:46:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654068935] [2024-01-31 16:46:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654068935] [2024-01-31 16:46:33,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654068935] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:33,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43085691] [2024-01-31 16:46:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:33,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:33,275 INFO L124 PetriNetUnfolderBase]: 496/856 cut-off events. [2024-01-31 16:46:33,276 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2024-01-31 16:46:33,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 856 events. 496/856 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3916 event pairs, 174 based on Foata normal form. 6/765 useless extension candidates. Maximal degree in co-relation 600. Up to 384 conditions per place. [2024-01-31 16:46:33,284 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 55 selfloop transitions, 5 changer transitions 2/63 dead transitions. [2024-01-31 16:46:33,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 63 transitions, 305 flow [2024-01-31 16:46:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-01-31 16:46:33,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-01-31 16:46:33,289 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 80 flow. Second operand 5 states and 72 transitions. [2024-01-31 16:46:33,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 63 transitions, 305 flow [2024-01-31 16:46:33,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 63 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:33,295 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 98 flow [2024-01-31 16:46:33,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-31 16:46:33,300 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-01-31 16:46:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 98 flow [2024-01-31 16:46:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:33,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:46:33,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:33,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1393375913, now seen corresponding path program 3 times [2024-01-31 16:46:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415350937] [2024-01-31 16:46:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415350937] [2024-01-31 16:46:33,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415350937] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:33,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141980647] [2024-01-31 16:46:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:33,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:33,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:33,564 INFO L124 PetriNetUnfolderBase]: 646/1115 cut-off events. [2024-01-31 16:46:33,564 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-01-31 16:46:33,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 1115 events. 646/1115 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5226 event pairs, 239 based on Foata normal form. 20/1134 useless extension candidates. Maximal degree in co-relation 1506. Up to 819 conditions per place. [2024-01-31 16:46:33,569 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 47 selfloop transitions, 4 changer transitions 4/56 dead transitions. [2024-01-31 16:46:33,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 290 flow [2024-01-31 16:46:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-01-31 16:46:33,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-01-31 16:46:33,570 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 98 flow. Second operand 4 states and 62 transitions. [2024-01-31 16:46:33,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 290 flow [2024-01-31 16:46:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:33,572 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 136 flow [2024-01-31 16:46:33,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-01-31 16:46:33,573 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2024-01-31 16:46:33,573 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 136 flow [2024-01-31 16:46:33,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:33,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:33,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:46:33,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:33,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1763323959, now seen corresponding path program 4 times [2024-01-31 16:46:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594561536] [2024-01-31 16:46:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594561536] [2024-01-31 16:46:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594561536] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836748879] [2024-01-31 16:46:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:33,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:33,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:33,762 INFO L124 PetriNetUnfolderBase]: 666/1140 cut-off events. [2024-01-31 16:46:33,762 INFO L125 PetriNetUnfolderBase]: For 790/790 co-relation queries the response was YES. [2024-01-31 16:46:33,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2904 conditions, 1140 events. 666/1140 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5276 event pairs, 225 based on Foata normal form. 26/1164 useless extension candidates. Maximal degree in co-relation 983. Up to 855 conditions per place. [2024-01-31 16:46:33,766 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 49 selfloop transitions, 6 changer transitions 2/58 dead transitions. [2024-01-31 16:46:33,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 339 flow [2024-01-31 16:46:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-01-31 16:46:33,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-01-31 16:46:33,767 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 136 flow. Second operand 4 states and 60 transitions. [2024-01-31 16:46:33,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 339 flow [2024-01-31 16:46:33,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 339 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:46:33,770 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 196 flow [2024-01-31 16:46:33,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-01-31 16:46:33,770 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-01-31 16:46:33,770 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 196 flow [2024-01-31 16:46:33,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:33,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:33,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:46:33,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:33,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1190442195, now seen corresponding path program 1 times [2024-01-31 16:46:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302824607] [2024-01-31 16:46:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302824607] [2024-01-31 16:46:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302824607] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:33,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856058309] [2024-01-31 16:46:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:33,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:33,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:33,938 INFO L124 PetriNetUnfolderBase]: 596/1016 cut-off events. [2024-01-31 16:46:33,938 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2024-01-31 16:46:33,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 1016 events. 596/1016 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4568 event pairs, 232 based on Foata normal form. 16/1030 useless extension candidates. Maximal degree in co-relation 937. Up to 510 conditions per place. [2024-01-31 16:46:33,942 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 58 selfloop transitions, 8 changer transitions 4/71 dead transitions. [2024-01-31 16:46:33,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 459 flow [2024-01-31 16:46:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-01-31 16:46:33,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5948275862068966 [2024-01-31 16:46:33,944 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 196 flow. Second operand 4 states and 69 transitions. [2024-01-31 16:46:33,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 459 flow [2024-01-31 16:46:33,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 453 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 16:46:33,947 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 212 flow [2024-01-31 16:46:33,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-01-31 16:46:33,948 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2024-01-31 16:46:33,948 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 212 flow [2024-01-31 16:46:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:33,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:33,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:46:33,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:33,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1379124869, now seen corresponding path program 1 times [2024-01-31 16:46:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532913685] [2024-01-31 16:46:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:33,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532913685] [2024-01-31 16:46:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532913685] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:33,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344624039] [2024-01-31 16:46:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:33,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:33,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:33,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:33,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:34,101 INFO L124 PetriNetUnfolderBase]: 530/894 cut-off events. [2024-01-31 16:46:34,116 INFO L125 PetriNetUnfolderBase]: For 1480/1480 co-relation queries the response was YES. [2024-01-31 16:46:34,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 894 events. 530/894 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3754 event pairs, 212 based on Foata normal form. 20/912 useless extension candidates. Maximal degree in co-relation 2441. Up to 474 conditions per place. [2024-01-31 16:46:34,120 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 55 selfloop transitions, 8 changer transitions 2/66 dead transitions. [2024-01-31 16:46:34,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 459 flow [2024-01-31 16:46:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-31 16:46:34,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2024-01-31 16:46:34,121 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 212 flow. Second operand 4 states and 65 transitions. [2024-01-31 16:46:34,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 459 flow [2024-01-31 16:46:34,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 433 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:34,124 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 216 flow [2024-01-31 16:46:34,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-01-31 16:46:34,124 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2024-01-31 16:46:34,124 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 216 flow [2024-01-31 16:46:34,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:34,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:34,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:34,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:46:34,125 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:34,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1914569799, now seen corresponding path program 1 times [2024-01-31 16:46:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:34,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685667919] [2024-01-31 16:46:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685667919] [2024-01-31 16:46:34,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685667919] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:34,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:34,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:46:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324087138] [2024-01-31 16:46:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:46:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:46:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:46:34,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:34,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:34,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:34,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:34,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:34,269 INFO L124 PetriNetUnfolderBase]: 528/890 cut-off events. [2024-01-31 16:46:34,269 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-01-31 16:46:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 890 events. 528/890 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3713 event pairs, 358 based on Foata normal form. 0/888 useless extension candidates. Maximal degree in co-relation 1750. Up to 882 conditions per place. [2024-01-31 16:46:34,274 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-01-31 16:46:34,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 298 flow [2024-01-31 16:46:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:46:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:46:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2024-01-31 16:46:34,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-01-31 16:46:34,275 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 216 flow. Second operand 3 states and 38 transitions. [2024-01-31 16:46:34,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 298 flow [2024-01-31 16:46:34,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 286 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:34,277 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 226 flow [2024-01-31 16:46:34,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-01-31 16:46:34,278 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 19 predicate places. [2024-01-31 16:46:34,278 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 226 flow [2024-01-31 16:46:34,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:34,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:34,278 INFO L208 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] [2024-01-31 16:46:34,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:46:34,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:34,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1172311652, now seen corresponding path program 1 times [2024-01-31 16:46:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:34,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512789594] [2024-01-31 16:46:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:34,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:34,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512789594] [2024-01-31 16:46:34,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512789594] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:34,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420269123] [2024-01-31 16:46:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:34,349 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) [2024-01-31 16:46:34,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:46:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:46:34,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:34,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420269123] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:34,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:34,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-01-31 16:46:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182834258] [2024-01-31 16:46:34,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:34,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:46:34,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:34,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:34,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:34,620 INFO L124 PetriNetUnfolderBase]: 528/896 cut-off events. [2024-01-31 16:46:34,621 INFO L125 PetriNetUnfolderBase]: For 1124/1124 co-relation queries the response was YES. [2024-01-31 16:46:34,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 896 events. 528/896 cut-off events. For 1124/1124 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3744 event pairs, 352 based on Foata normal form. 3/898 useless extension candidates. Maximal degree in co-relation 2600. Up to 882 conditions per place. [2024-01-31 16:46:34,625 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 10 changer transitions 0/46 dead transitions. [2024-01-31 16:46:34,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 340 flow [2024-01-31 16:46:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2024-01-31 16:46:34,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2024-01-31 16:46:34,626 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 226 flow. Second operand 6 states and 57 transitions. [2024-01-31 16:46:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 340 flow [2024-01-31 16:46:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:34,629 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 288 flow [2024-01-31 16:46:34,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-01-31 16:46:34,632 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2024-01-31 16:46:34,632 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 288 flow [2024-01-31 16:46:34,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:34,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:34,632 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:34,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:34,844 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash 843202233, now seen corresponding path program 2 times [2024-01-31 16:46:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114819874] [2024-01-31 16:46:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:34,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:34,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114819874] [2024-01-31 16:46:34,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114819874] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:34,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875349580] [2024-01-31 16:46:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:34,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:34,986 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) [2024-01-31 16:46:35,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:46:35,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:35,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:46:35,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:35,339 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:35,339 INFO L378 Elim1Store]: Elim1 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 103 treesize of output 64 [2024-01-31 16:46:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:46:35,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875349580] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:35,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-01-31 16:46:35,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551639316] [2024-01-31 16:46:35,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:35,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:35,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 288 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:35,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:35,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:35,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:35,829 INFO L124 PetriNetUnfolderBase]: 703/1215 cut-off events. [2024-01-31 16:46:35,829 INFO L125 PetriNetUnfolderBase]: For 1457/1457 co-relation queries the response was YES. [2024-01-31 16:46:35,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1215 events. 703/1215 cut-off events. For 1457/1457 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5873 event pairs, 128 based on Foata normal form. 7/1221 useless extension candidates. Maximal degree in co-relation 3475. Up to 446 conditions per place. [2024-01-31 16:46:35,835 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 93 selfloop transitions, 10 changer transitions 19/123 dead transitions. [2024-01-31 16:46:35,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 123 transitions, 832 flow [2024-01-31 16:46:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-01-31 16:46:35,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46360153256704983 [2024-01-31 16:46:35,837 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 288 flow. Second operand 9 states and 121 transitions. [2024-01-31 16:46:35,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 123 transitions, 832 flow [2024-01-31 16:46:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 123 transitions, 816 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:35,840 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 327 flow [2024-01-31 16:46:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-01-31 16:46:35,841 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-01-31 16:46:35,841 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 327 flow [2024-01-31 16:46:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:35,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:36,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-01-31 16:46:36,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:36,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash -454550861, now seen corresponding path program 3 times [2024-01-31 16:46:36,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520316765] [2024-01-31 16:46:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:36,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520316765] [2024-01-31 16:46:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520316765] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342353389] [2024-01-31 16:46:36,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:36,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:36,145 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) [2024-01-31 16:46:36,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:46:36,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:46:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:36,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:46:36,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:36,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:36,344 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:46:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:46:36,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342353389] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:36,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:36,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-01-31 16:46:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028059111] [2024-01-31 16:46:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:36,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:36,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 327 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:37,039 INFO L124 PetriNetUnfolderBase]: 835/1459 cut-off events. [2024-01-31 16:46:37,039 INFO L125 PetriNetUnfolderBase]: For 2332/2332 co-relation queries the response was YES. [2024-01-31 16:46:37,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 1459 events. 835/1459 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7512 event pairs, 144 based on Foata normal form. 5/1463 useless extension candidates. Maximal degree in co-relation 4705. Up to 460 conditions per place. [2024-01-31 16:46:37,048 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 136 selfloop transitions, 26 changer transitions 7/170 dead transitions. [2024-01-31 16:46:37,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 170 transitions, 1166 flow [2024-01-31 16:46:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:46:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:46:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 186 transitions. [2024-01-31 16:46:37,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-01-31 16:46:37,050 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 327 flow. Second operand 14 states and 186 transitions. [2024-01-31 16:46:37,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 170 transitions, 1166 flow [2024-01-31 16:46:37,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 170 transitions, 1096 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:37,057 INFO L231 Difference]: Finished difference. Result has 79 places, 66 transitions, 528 flow [2024-01-31 16:46:37,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=66} [2024-01-31 16:46:37,057 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 52 predicate places. [2024-01-31 16:46:37,057 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 66 transitions, 528 flow [2024-01-31 16:46:37,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:37,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:37,058 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:37,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:37,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:37,270 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:37,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1395740077, now seen corresponding path program 4 times [2024-01-31 16:46:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:37,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307573571] [2024-01-31 16:46:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:37,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:37,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307573571] [2024-01-31 16:46:37,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307573571] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:37,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586104671] [2024-01-31 16:46:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:46:37,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:37,380 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) [2024-01-31 16:46:37,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:46:37,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:46:37,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:37,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 16:46:37,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:37,617 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-01-31 16:46:37,617 INFO L378 Elim1Store]: Elim1 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 103 treesize of output 64 [2024-01-31 16:46:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:46:37,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:37,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586104671] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:37,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:37,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-01-31 16:46:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238712246] [2024-01-31 16:46:37,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:37,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 66 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:37,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:37,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:37,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:38,092 INFO L124 PetriNetUnfolderBase]: 837/1467 cut-off events. [2024-01-31 16:46:38,092 INFO L125 PetriNetUnfolderBase]: For 3639/3639 co-relation queries the response was YES. [2024-01-31 16:46:38,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5308 conditions, 1467 events. 837/1467 cut-off events. For 3639/3639 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7591 event pairs, 188 based on Foata normal form. 7/1473 useless extension candidates. Maximal degree in co-relation 5233. Up to 460 conditions per place. [2024-01-31 16:46:38,100 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 105 selfloop transitions, 22 changer transitions 14/142 dead transitions. [2024-01-31 16:46:38,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 142 transitions, 1138 flow [2024-01-31 16:46:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-01-31 16:46:38,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793103448275862 [2024-01-31 16:46:38,101 INFO L175 Difference]: Start difference. First operand has 79 places, 66 transitions, 528 flow. Second operand 10 states and 139 transitions. [2024-01-31 16:46:38,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 142 transitions, 1138 flow [2024-01-31 16:46:38,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 142 transitions, 1074 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:38,110 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 553 flow [2024-01-31 16:46:38,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=553, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2024-01-31 16:46:38,110 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2024-01-31 16:46:38,111 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 553 flow [2024-01-31 16:46:38,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:38,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:38,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:38,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:38,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:38,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:38,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1045327689, now seen corresponding path program 5 times [2024-01-31 16:46:38,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:38,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730096139] [2024-01-31 16:46:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:38,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:38,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730096139] [2024-01-31 16:46:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730096139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069176547] [2024-01-31 16:46:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:38,471 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) [2024-01-31 16:46:38,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:46:38,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:46:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:38,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:46:38,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:38,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:38,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069176547] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:38,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:38,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 16:46:38,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207333699] [2024-01-31 16:46:38,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:38,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:46:38,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:38,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:46:38,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:38,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:38,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 553 flow. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:38,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:38,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:38,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:38,871 INFO L124 PetriNetUnfolderBase]: 819/1432 cut-off events. [2024-01-31 16:46:38,871 INFO L125 PetriNetUnfolderBase]: For 4124/4124 co-relation queries the response was YES. [2024-01-31 16:46:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 1432 events. 819/1432 cut-off events. For 4124/4124 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7088 event pairs, 547 based on Foata normal form. 1/1432 useless extension candidates. Maximal degree in co-relation 5171. Up to 1409 conditions per place. [2024-01-31 16:46:38,879 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-01-31 16:46:38,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 703 flow [2024-01-31 16:46:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 58 transitions. [2024-01-31 16:46:38,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-01-31 16:46:38,881 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 553 flow. Second operand 7 states and 58 transitions. [2024-01-31 16:46:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 703 flow [2024-01-31 16:46:38,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 70 transitions, 662 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-01-31 16:46:38,889 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 558 flow [2024-01-31 16:46:38,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2024-01-31 16:46:38,890 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2024-01-31 16:46:38,890 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 558 flow [2024-01-31 16:46:38,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:38,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:38,891 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:38,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:46:39,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 16:46:39,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:39,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1524200804, now seen corresponding path program 6 times [2024-01-31 16:46:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286913331] [2024-01-31 16:46:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:39,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286913331] [2024-01-31 16:46:39,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286913331] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:39,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:39,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70042027] [2024-01-31 16:46:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:39,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:39,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:39,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 558 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:39,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:39,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:39,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:40,614 INFO L124 PetriNetUnfolderBase]: 1206/2112 cut-off events. [2024-01-31 16:46:40,615 INFO L125 PetriNetUnfolderBase]: For 5249/5249 co-relation queries the response was YES. [2024-01-31 16:46:40,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7355 conditions, 2112 events. 1206/2112 cut-off events. For 5249/5249 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11686 event pairs, 119 based on Foata normal form. 8/2120 useless extension candidates. Maximal degree in co-relation 7258. Up to 318 conditions per place. [2024-01-31 16:46:40,677 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 178 selfloop transitions, 90 changer transitions 22/291 dead transitions. [2024-01-31 16:46:40,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 291 transitions, 2153 flow [2024-01-31 16:46:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:46:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:46:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 347 transitions. [2024-01-31 16:46:40,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739224137931034 [2024-01-31 16:46:40,681 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 558 flow. Second operand 32 states and 347 transitions. [2024-01-31 16:46:40,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 291 transitions, 2153 flow [2024-01-31 16:46:40,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 291 transitions, 2129 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:40,693 INFO L231 Difference]: Finished difference. Result has 120 places, 134 transitions, 1329 flow [2024-01-31 16:46:40,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1329, PETRI_PLACES=120, PETRI_TRANSITIONS=134} [2024-01-31 16:46:40,694 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 93 predicate places. [2024-01-31 16:46:40,694 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 134 transitions, 1329 flow [2024-01-31 16:46:40,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:40,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:40,694 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:46:40,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:40,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -746116228, now seen corresponding path program 7 times [2024-01-31 16:46:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181465283] [2024-01-31 16:46:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181465283] [2024-01-31 16:46:41,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181465283] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:41,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:41,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:41,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087372378] [2024-01-31 16:46:41,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:41,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:41,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:41,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 134 transitions, 1329 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:41,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:41,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:41,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:42,028 INFO L124 PetriNetUnfolderBase]: 1678/2957 cut-off events. [2024-01-31 16:46:42,028 INFO L125 PetriNetUnfolderBase]: For 10329/10329 co-relation queries the response was YES. [2024-01-31 16:46:42,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 2957 events. 1678/2957 cut-off events. For 10329/10329 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17954 event pairs, 185 based on Foata normal form. 1/2958 useless extension candidates. Maximal degree in co-relation 11403. Up to 615 conditions per place. [2024-01-31 16:46:42,046 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 182 selfloop transitions, 102 changer transitions 11/296 dead transitions. [2024-01-31 16:46:42,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 296 transitions, 2954 flow [2024-01-31 16:46:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:46:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:46:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 242 transitions. [2024-01-31 16:46:42,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3973727422003284 [2024-01-31 16:46:42,049 INFO L175 Difference]: Start difference. First operand has 120 places, 134 transitions, 1329 flow. Second operand 21 states and 242 transitions. [2024-01-31 16:46:42,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 296 transitions, 2954 flow [2024-01-31 16:46:42,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 296 transitions, 2469 flow, removed 190 selfloop flow, removed 15 redundant places. [2024-01-31 16:46:42,088 INFO L231 Difference]: Finished difference. Result has 132 places, 190 transitions, 1879 flow [2024-01-31 16:46:42,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1879, PETRI_PLACES=132, PETRI_TRANSITIONS=190} [2024-01-31 16:46:42,089 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 105 predicate places. [2024-01-31 16:46:42,089 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 190 transitions, 1879 flow [2024-01-31 16:46:42,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:42,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:42,089 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:42,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:46:42,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:42,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1105423182, now seen corresponding path program 8 times [2024-01-31 16:46:42,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:42,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367427032] [2024-01-31 16:46:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:42,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:42,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:42,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367427032] [2024-01-31 16:46:42,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367427032] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:42,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:42,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020924262] [2024-01-31 16:46:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:42,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:42,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:42,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:42,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 190 transitions, 1879 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:42,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:42,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:42,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:43,479 INFO L124 PetriNetUnfolderBase]: 1723/3050 cut-off events. [2024-01-31 16:46:43,479 INFO L125 PetriNetUnfolderBase]: For 9620/9620 co-relation queries the response was YES. [2024-01-31 16:46:43,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 3050 events. 1723/3050 cut-off events. For 9620/9620 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18727 event pairs, 128 based on Foata normal form. 1/3051 useless extension candidates. Maximal degree in co-relation 11682. Up to 566 conditions per place. [2024-01-31 16:46:43,504 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 170 selfloop transitions, 153 changer transitions 10/334 dead transitions. [2024-01-31 16:46:43,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 334 transitions, 3217 flow [2024-01-31 16:46:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:46:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:46:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 294 transitions. [2024-01-31 16:46:43,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40551724137931033 [2024-01-31 16:46:43,507 INFO L175 Difference]: Start difference. First operand has 132 places, 190 transitions, 1879 flow. Second operand 25 states and 294 transitions. [2024-01-31 16:46:43,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 334 transitions, 3217 flow [2024-01-31 16:46:43,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 334 transitions, 3095 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:43,545 INFO L231 Difference]: Finished difference. Result has 158 places, 215 transitions, 2423 flow [2024-01-31 16:46:43,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1787, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2423, PETRI_PLACES=158, PETRI_TRANSITIONS=215} [2024-01-31 16:46:43,547 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 131 predicate places. [2024-01-31 16:46:43,547 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 215 transitions, 2423 flow [2024-01-31 16:46:43,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:43,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:43,547 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:43,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:46:43,547 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:43,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash -255927218, now seen corresponding path program 9 times [2024-01-31 16:46:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:43,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907757320] [2024-01-31 16:46:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:44,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907757320] [2024-01-31 16:46:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907757320] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:44,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688692814] [2024-01-31 16:46:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:44,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:44,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:44,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 215 transitions, 2423 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:44,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:44,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:44,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:44,993 INFO L124 PetriNetUnfolderBase]: 1744/3083 cut-off events. [2024-01-31 16:46:44,993 INFO L125 PetriNetUnfolderBase]: For 11402/11402 co-relation queries the response was YES. [2024-01-31 16:46:45,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 3083 events. 1744/3083 cut-off events. For 11402/11402 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18914 event pairs, 233 based on Foata normal form. 1/3084 useless extension candidates. Maximal degree in co-relation 12955. Up to 774 conditions per place. [2024-01-31 16:46:45,013 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 188 selfloop transitions, 132 changer transitions 11/332 dead transitions. [2024-01-31 16:46:45,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 332 transitions, 3536 flow [2024-01-31 16:46:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:46:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:46:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 271 transitions. [2024-01-31 16:46:45,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062968515742129 [2024-01-31 16:46:45,015 INFO L175 Difference]: Start difference. First operand has 158 places, 215 transitions, 2423 flow. Second operand 23 states and 271 transitions. [2024-01-31 16:46:45,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 332 transitions, 3536 flow [2024-01-31 16:46:45,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 332 transitions, 3417 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-01-31 16:46:45,050 INFO L231 Difference]: Finished difference. Result has 172 places, 219 transitions, 2642 flow [2024-01-31 16:46:45,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2642, PETRI_PLACES=172, PETRI_TRANSITIONS=219} [2024-01-31 16:46:45,051 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 145 predicate places. [2024-01-31 16:46:45,051 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 219 transitions, 2642 flow [2024-01-31 16:46:45,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:45,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:45,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:45,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:46:45,052 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:45,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:45,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1594363720, now seen corresponding path program 10 times [2024-01-31 16:46:45,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:45,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070521102] [2024-01-31 16:46:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:45,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070521102] [2024-01-31 16:46:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070521102] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625058122] [2024-01-31 16:46:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:45,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:45,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 219 transitions, 2642 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:45,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:45,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:45,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:46,244 INFO L124 PetriNetUnfolderBase]: 1752/3097 cut-off events. [2024-01-31 16:46:46,245 INFO L125 PetriNetUnfolderBase]: For 14347/14347 co-relation queries the response was YES. [2024-01-31 16:46:46,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13722 conditions, 3097 events. 1752/3097 cut-off events. For 14347/14347 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18994 event pairs, 460 based on Foata normal form. 1/3098 useless extension candidates. Maximal degree in co-relation 13618. Up to 1095 conditions per place. [2024-01-31 16:46:46,262 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 195 selfloop transitions, 88 changer transitions 10/294 dead transitions. [2024-01-31 16:46:46,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 294 transitions, 3496 flow [2024-01-31 16:46:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:46:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:46:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 195 transitions. [2024-01-31 16:46:46,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39553752535496955 [2024-01-31 16:46:46,264 INFO L175 Difference]: Start difference. First operand has 172 places, 219 transitions, 2642 flow. Second operand 17 states and 195 transitions. [2024-01-31 16:46:46,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 294 transitions, 3496 flow [2024-01-31 16:46:46,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 294 transitions, 3219 flow, removed 10 selfloop flow, removed 17 redundant places. [2024-01-31 16:46:46,297 INFO L231 Difference]: Finished difference. Result has 172 places, 219 transitions, 2559 flow [2024-01-31 16:46:46,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2559, PETRI_PLACES=172, PETRI_TRANSITIONS=219} [2024-01-31 16:46:46,298 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 145 predicate places. [2024-01-31 16:46:46,298 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 219 transitions, 2559 flow [2024-01-31 16:46:46,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:46,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,298 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:46:46,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:46,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash 331818104, now seen corresponding path program 11 times [2024-01-31 16:46:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493178029] [2024-01-31 16:46:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:46,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493178029] [2024-01-31 16:46:46,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493178029] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:46,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:46,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304446732] [2024-01-31 16:46:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:46,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:46,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:46,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:46,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 219 transitions, 2559 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:46,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:46,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:47,869 INFO L124 PetriNetUnfolderBase]: 1840/3275 cut-off events. [2024-01-31 16:46:47,869 INFO L125 PetriNetUnfolderBase]: For 13277/13277 co-relation queries the response was YES. [2024-01-31 16:46:47,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13913 conditions, 3275 events. 1840/3275 cut-off events. For 13277/13277 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20499 event pairs, 248 based on Foata normal form. 1/3276 useless extension candidates. Maximal degree in co-relation 13809. Up to 854 conditions per place. [2024-01-31 16:46:47,887 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 173 selfloop transitions, 134 changer transitions 11/319 dead transitions. [2024-01-31 16:46:47,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 319 transitions, 3638 flow [2024-01-31 16:46:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:46:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:46:47,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 232 transitions. [2024-01-31 16:46:47,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:46:47,888 INFO L175 Difference]: Start difference. First operand has 172 places, 219 transitions, 2559 flow. Second operand 20 states and 232 transitions. [2024-01-31 16:46:47,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 319 transitions, 3638 flow [2024-01-31 16:46:47,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 319 transitions, 3430 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-01-31 16:46:47,920 INFO L231 Difference]: Finished difference. Result has 178 places, 228 transitions, 2858 flow [2024-01-31 16:46:47,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2858, PETRI_PLACES=178, PETRI_TRANSITIONS=228} [2024-01-31 16:46:47,921 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 151 predicate places. [2024-01-31 16:46:47,921 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 228 transitions, 2858 flow [2024-01-31 16:46:47,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:47,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:47,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:47,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:46:47,922 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:47,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1130858108, now seen corresponding path program 12 times [2024-01-31 16:46:47,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:47,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675681504] [2024-01-31 16:46:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:48,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:48,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675681504] [2024-01-31 16:46:48,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675681504] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:48,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:48,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312523525] [2024-01-31 16:46:48,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:48,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:48,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:48,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:48,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 228 transitions, 2858 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:48,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:48,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:49,035 INFO L124 PetriNetUnfolderBase]: 1812/3213 cut-off events. [2024-01-31 16:46:49,035 INFO L125 PetriNetUnfolderBase]: For 16283/16283 co-relation queries the response was YES. [2024-01-31 16:46:49,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14314 conditions, 3213 events. 1812/3213 cut-off events. For 16283/16283 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19878 event pairs, 470 based on Foata normal form. 5/3218 useless extension candidates. Maximal degree in co-relation 14207. Up to 1248 conditions per place. [2024-01-31 16:46:49,056 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 176 selfloop transitions, 93 changer transitions 14/284 dead transitions. [2024-01-31 16:46:49,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 284 transitions, 3585 flow [2024-01-31 16:46:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:46:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:46:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 171 transitions. [2024-01-31 16:46:49,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36853448275862066 [2024-01-31 16:46:49,058 INFO L175 Difference]: Start difference. First operand has 178 places, 228 transitions, 2858 flow. Second operand 16 states and 171 transitions. [2024-01-31 16:46:49,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 284 transitions, 3585 flow [2024-01-31 16:46:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 284 transitions, 3426 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-01-31 16:46:49,102 INFO L231 Difference]: Finished difference. Result has 179 places, 223 transitions, 2828 flow [2024-01-31 16:46:49,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2828, PETRI_PLACES=179, PETRI_TRANSITIONS=223} [2024-01-31 16:46:49,103 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 152 predicate places. [2024-01-31 16:46:49,103 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 223 transitions, 2828 flow [2024-01-31 16:46:49,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:49,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:49,103 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:49,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:46:49,104 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:49,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1013936712, now seen corresponding path program 13 times [2024-01-31 16:46:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:49,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731537765] [2024-01-31 16:46:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:49,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731537765] [2024-01-31 16:46:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731537765] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:49,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:49,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955914888] [2024-01-31 16:46:49,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:49,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:49,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 223 transitions, 2828 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:49,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:49,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:49,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:50,462 INFO L124 PetriNetUnfolderBase]: 1952/3465 cut-off events. [2024-01-31 16:46:50,462 INFO L125 PetriNetUnfolderBase]: For 17359/17359 co-relation queries the response was YES. [2024-01-31 16:46:50,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15464 conditions, 3465 events. 1952/3465 cut-off events. For 17359/17359 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21775 event pairs, 125 based on Foata normal form. 1/3466 useless extension candidates. Maximal degree in co-relation 15357. Up to 708 conditions per place. [2024-01-31 16:46:50,484 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 187 selfloop transitions, 199 changer transitions 8/395 dead transitions. [2024-01-31 16:46:50,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 395 transitions, 4762 flow [2024-01-31 16:46:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:46:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:46:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 284 transitions. [2024-01-31 16:46:50,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40804597701149425 [2024-01-31 16:46:50,486 INFO L175 Difference]: Start difference. First operand has 179 places, 223 transitions, 2828 flow. Second operand 24 states and 284 transitions. [2024-01-31 16:46:50,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 395 transitions, 4762 flow [2024-01-31 16:46:50,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 395 transitions, 4472 flow, removed 10 selfloop flow, removed 18 redundant places. [2024-01-31 16:46:50,534 INFO L231 Difference]: Finished difference. Result has 193 places, 271 transitions, 3811 flow [2024-01-31 16:46:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3811, PETRI_PLACES=193, PETRI_TRANSITIONS=271} [2024-01-31 16:46:50,535 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 166 predicate places. [2024-01-31 16:46:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 271 transitions, 3811 flow [2024-01-31 16:46:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:46:50,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:50,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1404056248, now seen corresponding path program 14 times [2024-01-31 16:46:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096598686] [2024-01-31 16:46:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:50,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096598686] [2024-01-31 16:46:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096598686] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:50,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:50,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:50,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291949078] [2024-01-31 16:46:50,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:50,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:50,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:50,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:50,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 271 transitions, 3811 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:50,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:50,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:50,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:51,928 INFO L124 PetriNetUnfolderBase]: 2066/3733 cut-off events. [2024-01-31 16:46:51,929 INFO L125 PetriNetUnfolderBase]: For 21736/21736 co-relation queries the response was YES. [2024-01-31 16:46:51,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17395 conditions, 3733 events. 2066/3733 cut-off events. For 21736/21736 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24278 event pairs, 307 based on Foata normal form. 1/3734 useless extension candidates. Maximal degree in co-relation 17280. Up to 890 conditions per place. [2024-01-31 16:46:51,950 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 202 selfloop transitions, 173 changer transitions 8/384 dead transitions. [2024-01-31 16:46:51,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 384 transitions, 5235 flow [2024-01-31 16:46:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:46:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:46:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 232 transitions. [2024-01-31 16:46:51,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:46:51,954 INFO L175 Difference]: Start difference. First operand has 193 places, 271 transitions, 3811 flow. Second operand 20 states and 232 transitions. [2024-01-31 16:46:51,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 384 transitions, 5235 flow [2024-01-31 16:46:52,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 384 transitions, 5141 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:52,022 INFO L231 Difference]: Finished difference. Result has 214 places, 287 transitions, 4462 flow [2024-01-31 16:46:52,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4462, PETRI_PLACES=214, PETRI_TRANSITIONS=287} [2024-01-31 16:46:52,022 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 187 predicate places. [2024-01-31 16:46:52,022 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 287 transitions, 4462 flow [2024-01-31 16:46:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:52,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:52,023 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:52,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:46:52,023 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:52,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1785277034, now seen corresponding path program 15 times [2024-01-31 16:46:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:52,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948984335] [2024-01-31 16:46:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:52,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948984335] [2024-01-31 16:46:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948984335] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:52,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:52,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:52,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523859652] [2024-01-31 16:46:52,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:52,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:52,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:52,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:52,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:52,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 287 transitions, 4462 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:52,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:52,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:53,737 INFO L124 PetriNetUnfolderBase]: 2533/4568 cut-off events. [2024-01-31 16:46:53,737 INFO L125 PetriNetUnfolderBase]: For 30010/30010 co-relation queries the response was YES. [2024-01-31 16:46:53,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22283 conditions, 4568 events. 2533/4568 cut-off events. For 30010/30010 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30572 event pairs, 105 based on Foata normal form. 5/4573 useless extension candidates. Maximal degree in co-relation 22162. Up to 728 conditions per place. [2024-01-31 16:46:53,772 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 216 selfloop transitions, 257 changer transitions 12/486 dead transitions. [2024-01-31 16:46:53,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 486 transitions, 6947 flow [2024-01-31 16:46:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 16:46:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 16:46:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 305 transitions. [2024-01-31 16:46:53,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626634958382878 [2024-01-31 16:46:53,789 INFO L175 Difference]: Start difference. First operand has 214 places, 287 transitions, 4462 flow. Second operand 29 states and 305 transitions. [2024-01-31 16:46:53,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 486 transitions, 6947 flow [2024-01-31 16:46:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 486 transitions, 6754 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-01-31 16:46:53,918 INFO L231 Difference]: Finished difference. Result has 242 places, 346 transitions, 5955 flow [2024-01-31 16:46:53,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5955, PETRI_PLACES=242, PETRI_TRANSITIONS=346} [2024-01-31 16:46:53,919 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 215 predicate places. [2024-01-31 16:46:53,919 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 346 transitions, 5955 flow [2024-01-31 16:46:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:53,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:53,920 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:53,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-01-31 16:46:53,920 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:53,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash -806719590, now seen corresponding path program 16 times [2024-01-31 16:46:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:53,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642996715] [2024-01-31 16:46:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:54,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:54,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642996715] [2024-01-31 16:46:54,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642996715] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:54,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:54,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:54,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404422019] [2024-01-31 16:46:54,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:54,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:54,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:54,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:54,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 346 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:54,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:54,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:54,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:55,382 INFO L124 PetriNetUnfolderBase]: 2620/4728 cut-off events. [2024-01-31 16:46:55,382 INFO L125 PetriNetUnfolderBase]: For 39457/39457 co-relation queries the response was YES. [2024-01-31 16:46:55,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24584 conditions, 4728 events. 2620/4728 cut-off events. For 39457/39457 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32062 event pairs, 349 based on Foata normal form. 1/4729 useless extension candidates. Maximal degree in co-relation 24452. Up to 1285 conditions per place. [2024-01-31 16:46:55,416 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 241 selfloop transitions, 201 changer transitions 8/451 dead transitions. [2024-01-31 16:46:55,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 451 transitions, 7476 flow [2024-01-31 16:46:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:46:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:46:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 217 transitions. [2024-01-31 16:46:55,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938294010889292 [2024-01-31 16:46:55,418 INFO L175 Difference]: Start difference. First operand has 242 places, 346 transitions, 5955 flow. Second operand 19 states and 217 transitions. [2024-01-31 16:46:55,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 451 transitions, 7476 flow [2024-01-31 16:46:55,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 451 transitions, 7141 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-01-31 16:46:55,565 INFO L231 Difference]: Finished difference. Result has 254 places, 358 transitions, 6293 flow [2024-01-31 16:46:55,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6293, PETRI_PLACES=254, PETRI_TRANSITIONS=358} [2024-01-31 16:46:55,566 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 227 predicate places. [2024-01-31 16:46:55,566 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 358 transitions, 6293 flow [2024-01-31 16:46:55,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:55,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:55,566 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:55,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-01-31 16:46:55,567 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash -940550636, now seen corresponding path program 17 times [2024-01-31 16:46:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:55,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178305735] [2024-01-31 16:46:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:55,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:55,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:55,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178305735] [2024-01-31 16:46:55,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178305735] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:55,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:55,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:55,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753028898] [2024-01-31 16:46:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:55,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:55,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:55,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:55,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:55,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 358 transitions, 6293 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:55,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:55,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:55,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:56,993 INFO L124 PetriNetUnfolderBase]: 2808/5130 cut-off events. [2024-01-31 16:46:56,994 INFO L125 PetriNetUnfolderBase]: For 42085/42085 co-relation queries the response was YES. [2024-01-31 16:46:57,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26464 conditions, 5130 events. 2808/5130 cut-off events. For 42085/42085 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36032 event pairs, 373 based on Foata normal form. 1/5131 useless extension candidates. Maximal degree in co-relation 26330. Up to 1368 conditions per place. [2024-01-31 16:46:57,042 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 248 selfloop transitions, 188 changer transitions 8/445 dead transitions. [2024-01-31 16:46:57,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 445 transitions, 7635 flow [2024-01-31 16:46:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:46:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:46:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 201 transitions. [2024-01-31 16:46:57,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850574712643678 [2024-01-31 16:46:57,043 INFO L175 Difference]: Start difference. First operand has 254 places, 358 transitions, 6293 flow. Second operand 18 states and 201 transitions. [2024-01-31 16:46:57,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 445 transitions, 7635 flow [2024-01-31 16:46:57,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 445 transitions, 7475 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-01-31 16:46:57,217 INFO L231 Difference]: Finished difference. Result has 266 places, 370 transitions, 6783 flow [2024-01-31 16:46:57,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6783, PETRI_PLACES=266, PETRI_TRANSITIONS=370} [2024-01-31 16:46:57,217 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 239 predicate places. [2024-01-31 16:46:57,218 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 370 transitions, 6783 flow [2024-01-31 16:46:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:57,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:57,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-01-31 16:46:57,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:57,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1290963024, now seen corresponding path program 18 times [2024-01-31 16:46:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:57,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051602422] [2024-01-31 16:46:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:57,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051602422] [2024-01-31 16:46:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051602422] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035818263] [2024-01-31 16:46:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:57,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:57,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 370 transitions, 6783 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:57,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:57,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:57,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:58,881 INFO L124 PetriNetUnfolderBase]: 2976/5459 cut-off events. [2024-01-31 16:46:58,881 INFO L125 PetriNetUnfolderBase]: For 51570/51570 co-relation queries the response was YES. [2024-01-31 16:46:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28870 conditions, 5459 events. 2976/5459 cut-off events. For 51570/51570 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39149 event pairs, 427 based on Foata normal form. 1/5460 useless extension candidates. Maximal degree in co-relation 28735. Up to 1655 conditions per place. [2024-01-31 16:46:58,922 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 232 selfloop transitions, 237 changer transitions 9/479 dead transitions. [2024-01-31 16:46:58,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 479 transitions, 8389 flow [2024-01-31 16:46:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:46:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:46:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 240 transitions. [2024-01-31 16:46:58,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-01-31 16:46:58,930 INFO L175 Difference]: Start difference. First operand has 266 places, 370 transitions, 6783 flow. Second operand 20 states and 240 transitions. [2024-01-31 16:46:58,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 479 transitions, 8389 flow [2024-01-31 16:46:59,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 479 transitions, 8139 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:59,115 INFO L231 Difference]: Finished difference. Result has 285 places, 384 transitions, 7610 flow [2024-01-31 16:46:59,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7610, PETRI_PLACES=285, PETRI_TRANSITIONS=384} [2024-01-31 16:46:59,117 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 258 predicate places. [2024-01-31 16:46:59,117 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 384 transitions, 7610 flow [2024-01-31 16:46:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:59,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:59,117 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-01-31 16:46:59,117 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:59,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1504125722, now seen corresponding path program 19 times [2024-01-31 16:46:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:59,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153038036] [2024-01-31 16:46:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153038036] [2024-01-31 16:46:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153038036] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:46:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84761240] [2024-01-31 16:46:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:46:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:46:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:59,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:46:59,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 384 transitions, 7610 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:59,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:59,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:46:59,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:01,007 INFO L124 PetriNetUnfolderBase]: 2997/5490 cut-off events. [2024-01-31 16:47:01,007 INFO L125 PetriNetUnfolderBase]: For 63318/63318 co-relation queries the response was YES. [2024-01-31 16:47:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30543 conditions, 5490 events. 2997/5490 cut-off events. For 63318/63318 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39299 event pairs, 377 based on Foata normal form. 1/5491 useless extension candidates. Maximal degree in co-relation 30402. Up to 1655 conditions per place. [2024-01-31 16:47:01,056 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 236 selfloop transitions, 249 changer transitions 9/495 dead transitions. [2024-01-31 16:47:01,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 495 transitions, 9063 flow [2024-01-31 16:47:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:47:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:47:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 280 transitions. [2024-01-31 16:47:01,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-01-31 16:47:01,058 INFO L175 Difference]: Start difference. First operand has 285 places, 384 transitions, 7610 flow. Second operand 25 states and 280 transitions. [2024-01-31 16:47:01,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 495 transitions, 9063 flow [2024-01-31 16:47:01,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 495 transitions, 8930 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:01,268 INFO L231 Difference]: Finished difference. Result has 301 places, 385 transitions, 8101 flow [2024-01-31 16:47:01,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8101, PETRI_PLACES=301, PETRI_TRANSITIONS=385} [2024-01-31 16:47:01,269 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 274 predicate places. [2024-01-31 16:47:01,269 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 385 transitions, 8101 flow [2024-01-31 16:47:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:01,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:01,269 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-01-31 16:47:01,269 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2091871044, now seen corresponding path program 20 times [2024-01-31 16:47:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:01,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54268747] [2024-01-31 16:47:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:01,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:01,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54268747] [2024-01-31 16:47:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54268747] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:47:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594857663] [2024-01-31 16:47:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:47:01,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:47:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:47:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:01,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 385 transitions, 8101 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:01,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:03,208 INFO L124 PetriNetUnfolderBase]: 2987/5465 cut-off events. [2024-01-31 16:47:03,208 INFO L125 PetriNetUnfolderBase]: For 73368/73368 co-relation queries the response was YES. [2024-01-31 16:47:03,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31574 conditions, 5465 events. 2987/5465 cut-off events. For 73368/73368 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39014 event pairs, 352 based on Foata normal form. 1/5466 useless extension candidates. Maximal degree in co-relation 31434. Up to 1541 conditions per place. [2024-01-31 16:47:03,259 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 234 selfloop transitions, 253 changer transitions 9/497 dead transitions. [2024-01-31 16:47:03,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 497 transitions, 9520 flow [2024-01-31 16:47:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:47:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:47:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 288 transitions. [2024-01-31 16:47:03,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972413793103448 [2024-01-31 16:47:03,260 INFO L175 Difference]: Start difference. First operand has 301 places, 385 transitions, 8101 flow. Second operand 25 states and 288 transitions. [2024-01-31 16:47:03,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 497 transitions, 9520 flow [2024-01-31 16:47:03,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 497 transitions, 9148 flow, removed 8 selfloop flow, removed 16 redundant places. [2024-01-31 16:47:03,488 INFO L231 Difference]: Finished difference. Result has 310 places, 385 transitions, 8256 flow [2024-01-31 16:47:03,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7741, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8256, PETRI_PLACES=310, PETRI_TRANSITIONS=385} [2024-01-31 16:47:03,488 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 283 predicate places. [2024-01-31 16:47:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 385 transitions, 8256 flow [2024-01-31 16:47:03,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:03,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:03,489 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:03,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-01-31 16:47:03,489 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:03,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:03,489 INFO L85 PathProgramCache]: Analyzing trace with hash -244409194, now seen corresponding path program 21 times [2024-01-31 16:47:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:03,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747888324] [2024-01-31 16:47:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:03,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:03,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747888324] [2024-01-31 16:47:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747888324] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:03,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:03,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:47:03,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585093087] [2024-01-31 16:47:03,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:03,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:47:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:03,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:47:03,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:47:03,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:03,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 385 transitions, 8256 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:03,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:03,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:05,498 INFO L124 PetriNetUnfolderBase]: 2983/5461 cut-off events. [2024-01-31 16:47:05,498 INFO L125 PetriNetUnfolderBase]: For 67396/67396 co-relation queries the response was YES. [2024-01-31 16:47:05,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31975 conditions, 5461 events. 2983/5461 cut-off events. For 67396/67396 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 39191 event pairs, 251 based on Foata normal form. 1/5462 useless extension candidates. Maximal degree in co-relation 31834. Up to 966 conditions per place. [2024-01-31 16:47:05,537 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 220 selfloop transitions, 281 changer transitions 11/513 dead transitions. [2024-01-31 16:47:05,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 513 transitions, 9750 flow [2024-01-31 16:47:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:47:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:47:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 293 transitions. [2024-01-31 16:47:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3885941644562334 [2024-01-31 16:47:05,539 INFO L175 Difference]: Start difference. First operand has 310 places, 385 transitions, 8256 flow. Second operand 26 states and 293 transitions. [2024-01-31 16:47:05,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 513 transitions, 9750 flow [2024-01-31 16:47:05,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 513 transitions, 8985 flow, removed 13 selfloop flow, removed 24 redundant places. [2024-01-31 16:47:05,736 INFO L231 Difference]: Finished difference. Result has 312 places, 386 transitions, 8100 flow [2024-01-31 16:47:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8100, PETRI_PLACES=312, PETRI_TRANSITIONS=386} [2024-01-31 16:47:05,737 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 285 predicate places. [2024-01-31 16:47:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 386 transitions, 8100 flow [2024-01-31 16:47:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-01-31 16:47:05,738 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1605759594, now seen corresponding path program 22 times [2024-01-31 16:47:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165912538] [2024-01-31 16:47:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:06,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:06,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165912538] [2024-01-31 16:47:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165912538] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:06,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:06,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-01-31 16:47:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159728692] [2024-01-31 16:47:06,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:47:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:47:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:47:06,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:06,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 386 transitions, 8100 flow. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:06,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:06,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:06,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:07,690 INFO L124 PetriNetUnfolderBase]: 2971/5434 cut-off events. [2024-01-31 16:47:07,690 INFO L125 PetriNetUnfolderBase]: For 62672/62672 co-relation queries the response was YES. [2024-01-31 16:47:07,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31410 conditions, 5434 events. 2971/5434 cut-off events. For 62672/62672 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 38772 event pairs, 131 based on Foata normal form. 1/5435 useless extension candidates. Maximal degree in co-relation 31272. Up to 846 conditions per place. [2024-01-31 16:47:07,737 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 200 selfloop transitions, 321 changer transitions 9/531 dead transitions. [2024-01-31 16:47:07,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 531 transitions, 9682 flow [2024-01-31 16:47:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:47:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:47:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2024-01-31 16:47:07,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-01-31 16:47:07,752 INFO L175 Difference]: Start difference. First operand has 312 places, 386 transitions, 8100 flow. Second operand 33 states and 351 transitions. [2024-01-31 16:47:07,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 531 transitions, 9682 flow [2024-01-31 16:47:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 531 transitions, 9153 flow, removed 19 selfloop flow, removed 20 redundant places. [2024-01-31 16:47:07,982 INFO L231 Difference]: Finished difference. Result has 324 places, 387 transitions, 8249 flow [2024-01-31 16:47:07,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7587, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=8249, PETRI_PLACES=324, PETRI_TRANSITIONS=387} [2024-01-31 16:47:07,983 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 297 predicate places. [2024-01-31 16:47:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 387 transitions, 8249 flow [2024-01-31 16:47:07,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:07,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:07,984 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-01-31 16:47:07,984 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:07,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -340391826, now seen corresponding path program 1 times [2024-01-31 16:47:07,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:07,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915110107] [2024-01-31 16:47:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:07,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915110107] [2024-01-31 16:47:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915110107] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639607338] [2024-01-31 16:47:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:08,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:08,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:08,040 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) [2024-01-31 16:47:08,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:47:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:08,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:47:08,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639607338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:08,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:08,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-01-31 16:47:08,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723854240] [2024-01-31 16:47:08,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:08,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:08,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:08,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:08,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 387 transitions, 8249 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:08,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:08,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:08,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:09,250 INFO L124 PetriNetUnfolderBase]: 3321/6020 cut-off events. [2024-01-31 16:47:09,251 INFO L125 PetriNetUnfolderBase]: For 69793/69793 co-relation queries the response was YES. [2024-01-31 16:47:09,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37115 conditions, 6020 events. 3321/6020 cut-off events. For 69793/69793 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 41124 event pairs, 1119 based on Foata normal form. 402/6422 useless extension candidates. Maximal degree in co-relation 36981. Up to 1778 conditions per place. [2024-01-31 16:47:09,302 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 520 selfloop transitions, 117 changer transitions 0/638 dead transitions. [2024-01-31 16:47:09,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 638 transitions, 13877 flow [2024-01-31 16:47:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:47:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:47:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-01-31 16:47:09,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6157635467980296 [2024-01-31 16:47:09,303 INFO L175 Difference]: Start difference. First operand has 324 places, 387 transitions, 8249 flow. Second operand 7 states and 125 transitions. [2024-01-31 16:47:09,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 638 transitions, 13877 flow [2024-01-31 16:47:09,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 638 transitions, 12339 flow, removed 79 selfloop flow, removed 37 redundant places. [2024-01-31 16:47:09,525 INFO L231 Difference]: Finished difference. Result has 296 places, 429 transitions, 8516 flow [2024-01-31 16:47:09,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8516, PETRI_PLACES=296, PETRI_TRANSITIONS=429} [2024-01-31 16:47:09,526 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 269 predicate places. [2024-01-31 16:47:09,526 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 429 transitions, 8516 flow [2024-01-31 16:47:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:09,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:09,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:09,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 16:47:09,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:09,737 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1145912689, now seen corresponding path program 1 times [2024-01-31 16:47:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34437673] [2024-01-31 16:47:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:09,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34437673] [2024-01-31 16:47:09,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34437673] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:09,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185433374] [2024-01-31 16:47:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:09,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:09,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:09,786 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) [2024-01-31 16:47:09,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:47:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:09,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 16:47:09,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:09,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:09,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185433374] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:09,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:09,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-31 16:47:09,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545411406] [2024-01-31 16:47:09,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:09,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:47:09,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:47:09,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:47:09,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:09,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 429 transitions, 8516 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:09,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:09,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:09,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:11,065 INFO L124 PetriNetUnfolderBase]: 3861/6897 cut-off events. [2024-01-31 16:47:11,065 INFO L125 PetriNetUnfolderBase]: For 61488/61488 co-relation queries the response was YES. [2024-01-31 16:47:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43071 conditions, 6897 events. 3861/6897 cut-off events. For 61488/61488 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 45653 event pairs, 632 based on Foata normal form. 656/7553 useless extension candidates. Maximal degree in co-relation 42944. Up to 1639 conditions per place. [2024-01-31 16:47:11,124 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 601 selfloop transitions, 96 changer transitions 0/698 dead transitions. [2024-01-31 16:47:11,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 698 transitions, 14675 flow [2024-01-31 16:47:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:47:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:47:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-01-31 16:47:11,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-01-31 16:47:11,125 INFO L175 Difference]: Start difference. First operand has 296 places, 429 transitions, 8516 flow. Second operand 8 states and 118 transitions. [2024-01-31 16:47:11,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 698 transitions, 14675 flow [2024-01-31 16:47:11,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 698 transitions, 14381 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-01-31 16:47:11,405 INFO L231 Difference]: Finished difference. Result has 304 places, 468 transitions, 9281 flow [2024-01-31 16:47:11,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9281, PETRI_PLACES=304, PETRI_TRANSITIONS=468} [2024-01-31 16:47:11,405 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 277 predicate places. [2024-01-31 16:47:11,406 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 468 transitions, 9281 flow [2024-01-31 16:47:11,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:11,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:11,406 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:11,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:11,616 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1397130408, now seen corresponding path program 1 times [2024-01-31 16:47:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095498420] [2024-01-31 16:47:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:11,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095498420] [2024-01-31 16:47:11,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095498420] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881624842] [2024-01-31 16:47:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:11,926 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) [2024-01-31 16:47:11,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:47:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:12,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:47:12,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:12,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:12,240 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:12,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881624842] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:12,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-01-31 16:47:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759262899] [2024-01-31 16:47:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:47:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:47:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:47:12,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:12,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 468 transitions, 9281 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:12,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:14,059 INFO L124 PetriNetUnfolderBase]: 3938/7027 cut-off events. [2024-01-31 16:47:14,059 INFO L125 PetriNetUnfolderBase]: For 71121/71121 co-relation queries the response was YES. [2024-01-31 16:47:14,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 7027 events. 3938/7027 cut-off events. For 71121/71121 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 46776 event pairs, 499 based on Foata normal form. 62/7089 useless extension candidates. Maximal degree in co-relation 45820. Up to 1555 conditions per place. [2024-01-31 16:47:14,127 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 188 selfloop transitions, 377 changer transitions 1/567 dead transitions. [2024-01-31 16:47:14,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 567 transitions, 11176 flow [2024-01-31 16:47:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:47:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:47:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 196 transitions. [2024-01-31 16:47:14,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-01-31 16:47:14,128 INFO L175 Difference]: Start difference. First operand has 304 places, 468 transitions, 9281 flow. Second operand 18 states and 196 transitions. [2024-01-31 16:47:14,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 567 transitions, 11176 flow [2024-01-31 16:47:14,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 567 transitions, 10984 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:14,461 INFO L231 Difference]: Finished difference. Result has 319 places, 491 transitions, 10366 flow [2024-01-31 16:47:14,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10366, PETRI_PLACES=319, PETRI_TRANSITIONS=491} [2024-01-31 16:47:14,462 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 292 predicate places. [2024-01-31 16:47:14,462 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 491 transitions, 10366 flow [2024-01-31 16:47:14,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:14,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:14,462 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:14,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:14,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-31 16:47:14,675 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:14,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash -257979876, now seen corresponding path program 2 times [2024-01-31 16:47:14,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:14,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918801985] [2024-01-31 16:47:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:14,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:15,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918801985] [2024-01-31 16:47:15,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918801985] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:15,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:15,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:15,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420761581] [2024-01-31 16:47:15,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:15,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 491 transitions, 10366 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:16,418 INFO L124 PetriNetUnfolderBase]: 4008/7193 cut-off events. [2024-01-31 16:47:16,418 INFO L125 PetriNetUnfolderBase]: For 78859/78859 co-relation queries the response was YES. [2024-01-31 16:47:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 7193 events. 4008/7193 cut-off events. For 78859/78859 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 48515 event pairs, 1079 based on Foata normal form. 38/7231 useless extension candidates. Maximal degree in co-relation 48815. Up to 3166 conditions per place. [2024-01-31 16:47:16,493 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 289 selfloop transitions, 251 changer transitions 0/541 dead transitions. [2024-01-31 16:47:16,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 541 transitions, 11715 flow [2024-01-31 16:47:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-01-31 16:47:16,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-01-31 16:47:16,494 INFO L175 Difference]: Start difference. First operand has 319 places, 491 transitions, 10366 flow. Second operand 12 states and 136 transitions. [2024-01-31 16:47:16,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 541 transitions, 11715 flow [2024-01-31 16:47:16,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 541 transitions, 11391 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:16,849 INFO L231 Difference]: Finished difference. Result has 322 places, 490 transitions, 10774 flow [2024-01-31 16:47:16,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9969, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10774, PETRI_PLACES=322, PETRI_TRANSITIONS=490} [2024-01-31 16:47:16,849 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 295 predicate places. [2024-01-31 16:47:16,850 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 490 transitions, 10774 flow [2024-01-31 16:47:16,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:16,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:16,850 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:16,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-01-31 16:47:16,850 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:16,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:16,851 INFO L85 PathProgramCache]: Analyzing trace with hash -328056172, now seen corresponding path program 3 times [2024-01-31 16:47:16,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:16,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979792285] [2024-01-31 16:47:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979792285] [2024-01-31 16:47:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979792285] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146714954] [2024-01-31 16:47:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:17,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:17,165 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) [2024-01-31 16:47:17,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:47:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:17,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:17,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:17,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:17,541 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:17,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:17,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146714954] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:17,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:17,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-01-31 16:47:17,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698966112] [2024-01-31 16:47:17,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:17,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:47:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:47:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:47:17,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 490 transitions, 10774 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:19,764 INFO L124 PetriNetUnfolderBase]: 5232/9393 cut-off events. [2024-01-31 16:47:19,765 INFO L125 PetriNetUnfolderBase]: For 113505/113505 co-relation queries the response was YES. [2024-01-31 16:47:19,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65101 conditions, 9393 events. 5232/9393 cut-off events. For 113505/113505 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 66803 event pairs, 758 based on Foata normal form. 50/9443 useless extension candidates. Maximal degree in co-relation 64966. Up to 2033 conditions per place. [2024-01-31 16:47:19,863 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 292 selfloop transitions, 403 changer transitions 2/698 dead transitions. [2024-01-31 16:47:19,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 698 transitions, 14538 flow [2024-01-31 16:47:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:47:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:47:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 283 transitions. [2024-01-31 16:47:19,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40660919540229884 [2024-01-31 16:47:19,865 INFO L175 Difference]: Start difference. First operand has 322 places, 490 transitions, 10774 flow. Second operand 24 states and 283 transitions. [2024-01-31 16:47:19,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 698 transitions, 14538 flow [2024-01-31 16:47:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 698 transitions, 14144 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:20,603 INFO L231 Difference]: Finished difference. Result has 346 places, 574 transitions, 13572 flow [2024-01-31 16:47:20,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13572, PETRI_PLACES=346, PETRI_TRANSITIONS=574} [2024-01-31 16:47:20,603 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 319 predicate places. [2024-01-31 16:47:20,603 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 574 transitions, 13572 flow [2024-01-31 16:47:20,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:20,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:20,604 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:20,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 16:47:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:20,815 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:20,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash 48032617, now seen corresponding path program 1 times [2024-01-31 16:47:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756258435] [2024-01-31 16:47:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:20,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:21,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756258435] [2024-01-31 16:47:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756258435] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:21,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:21,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389078121] [2024-01-31 16:47:21,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:21,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:21,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:21,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:21,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 574 transitions, 13572 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:21,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:21,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:23,331 INFO L124 PetriNetUnfolderBase]: 5350/9629 cut-off events. [2024-01-31 16:47:23,331 INFO L125 PetriNetUnfolderBase]: For 134042/134042 co-relation queries the response was YES. [2024-01-31 16:47:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70363 conditions, 9629 events. 5350/9629 cut-off events. For 134042/134042 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 69017 event pairs, 1555 based on Foata normal form. 30/9659 useless extension candidates. Maximal degree in co-relation 70217. Up to 3570 conditions per place. [2024-01-31 16:47:23,427 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 369 selfloop transitions, 260 changer transitions 0/630 dead transitions. [2024-01-31 16:47:23,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 630 transitions, 15302 flow [2024-01-31 16:47:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-01-31 16:47:23,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043887147335423 [2024-01-31 16:47:23,429 INFO L175 Difference]: Start difference. First operand has 346 places, 574 transitions, 13572 flow. Second operand 11 states and 129 transitions. [2024-01-31 16:47:23,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 630 transitions, 15302 flow [2024-01-31 16:47:24,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 630 transitions, 15014 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:24,180 INFO L231 Difference]: Finished difference. Result has 349 places, 576 transitions, 13903 flow [2024-01-31 16:47:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13268, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13903, PETRI_PLACES=349, PETRI_TRANSITIONS=576} [2024-01-31 16:47:24,181 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 322 predicate places. [2024-01-31 16:47:24,181 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 576 transitions, 13903 flow [2024-01-31 16:47:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-01-31 16:47:24,181 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:24,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2005691079, now seen corresponding path program 2 times [2024-01-31 16:47:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972517823] [2024-01-31 16:47:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:24,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:24,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972517823] [2024-01-31 16:47:24,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972517823] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:24,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:24,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676644386] [2024-01-31 16:47:24,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:24,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:24,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 576 transitions, 13903 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:26,530 INFO L124 PetriNetUnfolderBase]: 5254/9431 cut-off events. [2024-01-31 16:47:26,531 INFO L125 PetriNetUnfolderBase]: For 133844/133844 co-relation queries the response was YES. [2024-01-31 16:47:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69852 conditions, 9431 events. 5254/9431 cut-off events. For 133844/133844 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 66981 event pairs, 1525 based on Foata normal form. 6/9437 useless extension candidates. Maximal degree in co-relation 69707. Up to 3570 conditions per place. [2024-01-31 16:47:26,633 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 347 selfloop transitions, 261 changer transitions 5/614 dead transitions. [2024-01-31 16:47:26,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 614 transitions, 15230 flow [2024-01-31 16:47:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-01-31 16:47:26,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-01-31 16:47:26,635 INFO L175 Difference]: Start difference. First operand has 349 places, 576 transitions, 13903 flow. Second operand 12 states and 128 transitions. [2024-01-31 16:47:26,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 614 transitions, 15230 flow [2024-01-31 16:47:27,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 614 transitions, 15001 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:27,381 INFO L231 Difference]: Finished difference. Result has 354 places, 573 transitions, 14131 flow [2024-01-31 16:47:27,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13626, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14131, PETRI_PLACES=354, PETRI_TRANSITIONS=573} [2024-01-31 16:47:27,382 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 327 predicate places. [2024-01-31 16:47:27,382 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 573 transitions, 14131 flow [2024-01-31 16:47:27,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:27,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:27,383 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:27,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-01-31 16:47:27,383 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:27,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:27,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1448552258, now seen corresponding path program 4 times [2024-01-31 16:47:27,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:27,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066322841] [2024-01-31 16:47:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:27,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:27,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066322841] [2024-01-31 16:47:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066322841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:27,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783089743] [2024-01-31 16:47:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:27,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:27,706 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) [2024-01-31 16:47:27,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:47:27,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:27,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:47:27,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:27,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:27,916 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:47:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:27,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:28,021 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:28,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:47:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:28,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783089743] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:28,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:28,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-01-31 16:47:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993386101] [2024-01-31 16:47:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:28,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:28,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:28,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 573 transitions, 14131 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:28,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:28,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:28,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:30,712 INFO L124 PetriNetUnfolderBase]: 5613/10090 cut-off events. [2024-01-31 16:47:30,712 INFO L125 PetriNetUnfolderBase]: For 156449/156449 co-relation queries the response was YES. [2024-01-31 16:47:30,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76622 conditions, 10090 events. 5613/10090 cut-off events. For 156449/156449 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 72955 event pairs, 1058 based on Foata normal form. 40/10130 useless extension candidates. Maximal degree in co-relation 76477. Up to 3657 conditions per place. [2024-01-31 16:47:30,813 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 338 selfloop transitions, 364 changer transitions 1/704 dead transitions. [2024-01-31 16:47:30,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 704 transitions, 16918 flow [2024-01-31 16:47:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:47:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:47:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 249 transitions. [2024-01-31 16:47:30,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390282131661442 [2024-01-31 16:47:30,814 INFO L175 Difference]: Start difference. First operand has 354 places, 573 transitions, 14131 flow. Second operand 22 states and 249 transitions. [2024-01-31 16:47:30,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 704 transitions, 16918 flow [2024-01-31 16:47:31,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 704 transitions, 16351 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:31,573 INFO L231 Difference]: Finished difference. Result has 367 places, 606 transitions, 15645 flow [2024-01-31 16:47:31,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13513, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15645, PETRI_PLACES=367, PETRI_TRANSITIONS=606} [2024-01-31 16:47:31,574 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 340 predicate places. [2024-01-31 16:47:31,574 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 606 transitions, 15645 flow [2024-01-31 16:47:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:31,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:31,574 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:31,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-31 16:47:31,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:31,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 387774168, now seen corresponding path program 5 times [2024-01-31 16:47:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133145068] [2024-01-31 16:47:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:32,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:32,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133145068] [2024-01-31 16:47:32,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133145068] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:32,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11371717] [2024-01-31 16:47:32,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:32,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:32,072 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) [2024-01-31 16:47:32,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:47:32,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:32,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:32,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:47:32,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:32,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:32,343 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:47:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:32,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:32,442 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:32,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 95 [2024-01-31 16:47:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11371717] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:32,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:47:32,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 20 [2024-01-31 16:47:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981990433] [2024-01-31 16:47:32,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:47:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:47:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:47:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:32,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 606 transitions, 15645 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:32,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:32,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:32,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:35,235 INFO L124 PetriNetUnfolderBase]: 6027/10971 cut-off events. [2024-01-31 16:47:35,235 INFO L125 PetriNetUnfolderBase]: For 176760/176760 co-relation queries the response was YES. [2024-01-31 16:47:35,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84255 conditions, 10971 events. 6027/10971 cut-off events. For 176760/176760 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 81988 event pairs, 1467 based on Foata normal form. 38/11009 useless extension candidates. Maximal degree in co-relation 84105. Up to 4521 conditions per place. [2024-01-31 16:47:35,374 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 386 selfloop transitions, 299 changer transitions 0/686 dead transitions. [2024-01-31 16:47:35,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 686 transitions, 17756 flow [2024-01-31 16:47:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-01-31 16:47:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962382445141066 [2024-01-31 16:47:35,375 INFO L175 Difference]: Start difference. First operand has 367 places, 606 transitions, 15645 flow. Second operand 11 states and 153 transitions. [2024-01-31 16:47:35,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 686 transitions, 17756 flow [2024-01-31 16:47:36,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 686 transitions, 17620 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-01-31 16:47:36,513 INFO L231 Difference]: Finished difference. Result has 367 places, 617 transitions, 16762 flow [2024-01-31 16:47:36,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15456, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16762, PETRI_PLACES=367, PETRI_TRANSITIONS=617} [2024-01-31 16:47:36,513 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 340 predicate places. [2024-01-31 16:47:36,513 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 617 transitions, 16762 flow [2024-01-31 16:47:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:36,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:36,514 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:36,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:36,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 16:47:36,724 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:36,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:36,725 INFO L85 PathProgramCache]: Analyzing trace with hash -277803706, now seen corresponding path program 6 times [2024-01-31 16:47:36,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:36,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545751791] [2024-01-31 16:47:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:36,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545751791] [2024-01-31 16:47:36,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545751791] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:36,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147896900] [2024-01-31 16:47:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:36,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:36,995 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) [2024-01-31 16:47:37,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:47:37,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:47:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:37,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:37,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:37,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:37,335 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:37,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:47:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:37,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147896900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:37,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:37,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 16 [2024-01-31 16:47:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728389743] [2024-01-31 16:47:37,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:37,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:47:37,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:47:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:47:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:37,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 617 transitions, 16762 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:37,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:37,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:37,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:39,946 INFO L124 PetriNetUnfolderBase]: 5829/10586 cut-off events. [2024-01-31 16:47:39,947 INFO L125 PetriNetUnfolderBase]: For 206643/206643 co-relation queries the response was YES. [2024-01-31 16:47:40,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86386 conditions, 10586 events. 5829/10586 cut-off events. For 206643/206643 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 78263 event pairs, 1147 based on Foata normal form. 68/10654 useless extension candidates. Maximal degree in co-relation 86239. Up to 3354 conditions per place. [2024-01-31 16:47:40,078 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 372 selfloop transitions, 355 changer transitions 0/728 dead transitions. [2024-01-31 16:47:40,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 728 transitions, 19081 flow [2024-01-31 16:47:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:47:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:47:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 215 transitions. [2024-01-31 16:47:40,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118773946360153 [2024-01-31 16:47:40,079 INFO L175 Difference]: Start difference. First operand has 367 places, 617 transitions, 16762 flow. Second operand 18 states and 215 transitions. [2024-01-31 16:47:40,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 728 transitions, 19081 flow [2024-01-31 16:47:41,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 728 transitions, 18929 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:41,300 INFO L231 Difference]: Finished difference. Result has 383 places, 639 transitions, 18160 flow [2024-01-31 16:47:41,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16567, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18160, PETRI_PLACES=383, PETRI_TRANSITIONS=639} [2024-01-31 16:47:41,301 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 356 predicate places. [2024-01-31 16:47:41,301 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 639 transitions, 18160 flow [2024-01-31 16:47:41,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:41,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:41,301 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:41,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:41,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:47:41,513 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:41,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash 213671285, now seen corresponding path program 3 times [2024-01-31 16:47:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:41,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961677878] [2024-01-31 16:47:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:41,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:41,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:41,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961677878] [2024-01-31 16:47:41,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961677878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:41,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935543534] [2024-01-31 16:47:41,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:41,846 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) [2024-01-31 16:47:41,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:47:42,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:42,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:42,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:42,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:42,171 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:47:42,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:47:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935543534] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:42,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2024-01-31 16:47:42,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261262831] [2024-01-31 16:47:42,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:42,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:47:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:47:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:47:42,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:42,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 639 transitions, 18160 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:42,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:44,919 INFO L124 PetriNetUnfolderBase]: 6045/11088 cut-off events. [2024-01-31 16:47:44,919 INFO L125 PetriNetUnfolderBase]: For 237666/237666 co-relation queries the response was YES. [2024-01-31 16:47:45,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92572 conditions, 11088 events. 6045/11088 cut-off events. For 237666/237666 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 83763 event pairs, 1267 based on Foata normal form. 40/11128 useless extension candidates. Maximal degree in co-relation 92418. Up to 3486 conditions per place. [2024-01-31 16:47:45,069 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 400 selfloop transitions, 356 changer transitions 0/757 dead transitions. [2024-01-31 16:47:45,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 757 transitions, 21091 flow [2024-01-31 16:47:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:47:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:47:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 188 transitions. [2024-01-31 16:47:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-01-31 16:47:45,071 INFO L175 Difference]: Start difference. First operand has 383 places, 639 transitions, 18160 flow. Second operand 16 states and 188 transitions. [2024-01-31 16:47:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 757 transitions, 21091 flow [2024-01-31 16:47:46,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 757 transitions, 20402 flow, removed 20 selfloop flow, removed 16 redundant places. [2024-01-31 16:47:46,553 INFO L231 Difference]: Finished difference. Result has 387 places, 680 transitions, 19434 flow [2024-01-31 16:47:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17510, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19434, PETRI_PLACES=387, PETRI_TRANSITIONS=680} [2024-01-31 16:47:46,554 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 360 predicate places. [2024-01-31 16:47:46,554 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 680 transitions, 19434 flow [2024-01-31 16:47:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:46,554 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:46,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:47:46,766 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:46,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -136685220, now seen corresponding path program 7 times [2024-01-31 16:47:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364974100] [2024-01-31 16:47:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364974100] [2024-01-31 16:47:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364974100] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:47,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60806339] [2024-01-31 16:47:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:47,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:47,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:47,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:47,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:47,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 680 transitions, 19434 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:47,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:47,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:47,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:49,653 INFO L124 PetriNetUnfolderBase]: 5973/10928 cut-off events. [2024-01-31 16:47:49,653 INFO L125 PetriNetUnfolderBase]: For 231605/231605 co-relation queries the response was YES. [2024-01-31 16:47:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92233 conditions, 10928 events. 5973/10928 cut-off events. For 231605/231605 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 81844 event pairs, 2706 based on Foata normal form. 4/10932 useless extension candidates. Maximal degree in co-relation 92077. Up to 8216 conditions per place. [2024-01-31 16:47:49,795 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 522 selfloop transitions, 183 changer transitions 3/709 dead transitions. [2024-01-31 16:47:49,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 709 transitions, 20734 flow [2024-01-31 16:47:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 132 transitions. [2024-01-31 16:47:49,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35013262599469497 [2024-01-31 16:47:49,797 INFO L175 Difference]: Start difference. First operand has 387 places, 680 transitions, 19434 flow. Second operand 13 states and 132 transitions. [2024-01-31 16:47:49,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 709 transitions, 20734 flow [2024-01-31 16:47:51,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 709 transitions, 20013 flow, removed 39 selfloop flow, removed 13 redundant places. [2024-01-31 16:47:51,344 INFO L231 Difference]: Finished difference. Result has 385 places, 671 transitions, 18819 flow [2024-01-31 16:47:51,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18468, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18819, PETRI_PLACES=385, PETRI_TRANSITIONS=671} [2024-01-31 16:47:51,345 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 358 predicate places. [2024-01-31 16:47:51,345 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 671 transitions, 18819 flow [2024-01-31 16:47:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:51,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:51,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-01-31 16:47:51,346 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -353716245, now seen corresponding path program 4 times [2024-01-31 16:47:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82890777] [2024-01-31 16:47:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:51,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:51,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82890777] [2024-01-31 16:47:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82890777] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:51,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:51,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982186055] [2024-01-31 16:47:51,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:51,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:51,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:51,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 671 transitions, 18819 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:51,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:51,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:51,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:54,227 INFO L124 PetriNetUnfolderBase]: 5959/10904 cut-off events. [2024-01-31 16:47:54,227 INFO L125 PetriNetUnfolderBase]: For 217704/217704 co-relation queries the response was YES. [2024-01-31 16:47:54,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90638 conditions, 10904 events. 5959/10904 cut-off events. For 217704/217704 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 81833 event pairs, 2811 based on Foata normal form. 6/10910 useless extension candidates. Maximal degree in co-relation 90490. Up to 8039 conditions per place. [2024-01-31 16:47:54,376 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 613 selfloop transitions, 87 changer transitions 6/707 dead transitions. [2024-01-31 16:47:54,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 707 transitions, 20297 flow [2024-01-31 16:47:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 128 transitions. [2024-01-31 16:47:54,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3395225464190981 [2024-01-31 16:47:54,378 INFO L175 Difference]: Start difference. First operand has 385 places, 671 transitions, 18819 flow. Second operand 13 states and 128 transitions. [2024-01-31 16:47:54,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 707 transitions, 20297 flow [2024-01-31 16:47:55,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 707 transitions, 20074 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-01-31 16:47:55,995 INFO L231 Difference]: Finished difference. Result has 384 places, 667 transitions, 18683 flow [2024-01-31 16:47:55,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18539, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18683, PETRI_PLACES=384, PETRI_TRANSITIONS=667} [2024-01-31 16:47:55,997 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 357 predicate places. [2024-01-31 16:47:55,997 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 667 transitions, 18683 flow [2024-01-31 16:47:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:55,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:55,998 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:55,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-01-31 16:47:55,998 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:55,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1440653745, now seen corresponding path program 5 times [2024-01-31 16:47:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:55,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635463459] [2024-01-31 16:47:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:55,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:56,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:56,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635463459] [2024-01-31 16:47:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635463459] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:56,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:47:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487699734] [2024-01-31 16:47:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:47:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:47:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:47:56,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:47:56,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 667 transitions, 18683 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:56,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:56,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:47:56,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:58,936 INFO L124 PetriNetUnfolderBase]: 5939/10866 cut-off events. [2024-01-31 16:47:58,937 INFO L125 PetriNetUnfolderBase]: For 221062/221062 co-relation queries the response was YES. [2024-01-31 16:47:59,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90129 conditions, 10866 events. 5939/10866 cut-off events. For 221062/221062 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 81556 event pairs, 2867 based on Foata normal form. 6/10872 useless extension candidates. Maximal degree in co-relation 89982. Up to 8039 conditions per place. [2024-01-31 16:47:59,111 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 612 selfloop transitions, 80 changer transitions 4/697 dead transitions. [2024-01-31 16:47:59,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 697 transitions, 20127 flow [2024-01-31 16:47:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-01-31 16:47:59,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34770114942528735 [2024-01-31 16:47:59,113 INFO L175 Difference]: Start difference. First operand has 384 places, 667 transitions, 18683 flow. Second operand 12 states and 121 transitions. [2024-01-31 16:47:59,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 697 transitions, 20127 flow [2024-01-31 16:48:00,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 697 transitions, 19968 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:00,562 INFO L231 Difference]: Finished difference. Result has 382 places, 664 transitions, 18614 flow [2024-01-31 16:48:00,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18473, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18614, PETRI_PLACES=382, PETRI_TRANSITIONS=664} [2024-01-31 16:48:00,563 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 355 predicate places. [2024-01-31 16:48:00,563 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 664 transitions, 18614 flow [2024-01-31 16:48:00,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:00,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:00,563 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-01-31 16:48:00,564 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:00,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1586136421, now seen corresponding path program 6 times [2024-01-31 16:48:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:00,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600503767] [2024-01-31 16:48:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:00,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:00,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600503767] [2024-01-31 16:48:00,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600503767] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:00,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:00,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:48:00,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755458906] [2024-01-31 16:48:00,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:00,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:48:00,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:48:00,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:00,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:00,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 664 transitions, 18614 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:00,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:00,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:00,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:03,717 INFO L124 PetriNetUnfolderBase]: 6019/11016 cut-off events. [2024-01-31 16:48:03,717 INFO L125 PetriNetUnfolderBase]: For 226541/226541 co-relation queries the response was YES. [2024-01-31 16:48:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91419 conditions, 11016 events. 6019/11016 cut-off events. For 226541/226541 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 82712 event pairs, 2043 based on Foata normal form. 30/11046 useless extension candidates. Maximal degree in co-relation 91272. Up to 4678 conditions per place. [2024-01-31 16:48:03,828 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 419 selfloop transitions, 295 changer transitions 0/715 dead transitions. [2024-01-31 16:48:03,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 715 transitions, 20524 flow [2024-01-31 16:48:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-01-31 16:48:03,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012539184952978 [2024-01-31 16:48:03,829 INFO L175 Difference]: Start difference. First operand has 382 places, 664 transitions, 18614 flow. Second operand 11 states and 128 transitions. [2024-01-31 16:48:03,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 715 transitions, 20524 flow [2024-01-31 16:48:05,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 715 transitions, 20355 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:05,041 INFO L231 Difference]: Finished difference. Result has 383 places, 664 transitions, 19107 flow [2024-01-31 16:48:05,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18378, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19107, PETRI_PLACES=383, PETRI_TRANSITIONS=664} [2024-01-31 16:48:05,041 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 356 predicate places. [2024-01-31 16:48:05,042 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 664 transitions, 19107 flow [2024-01-31 16:48:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:05,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:05,042 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:05,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-01-31 16:48:05,042 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -671774885, now seen corresponding path program 7 times [2024-01-31 16:48:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:05,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902605747] [2024-01-31 16:48:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:05,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:05,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902605747] [2024-01-31 16:48:05,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902605747] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:05,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:05,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:48:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603756059] [2024-01-31 16:48:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:48:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:48:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:05,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 664 transitions, 19107 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:05,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:05,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:07,983 INFO L124 PetriNetUnfolderBase]: 5923/10818 cut-off events. [2024-01-31 16:48:07,984 INFO L125 PetriNetUnfolderBase]: For 234463/234463 co-relation queries the response was YES. [2024-01-31 16:48:08,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91638 conditions, 10818 events. 5923/10818 cut-off events. For 234463/234463 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 80802 event pairs, 2845 based on Foata normal form. 6/10824 useless extension candidates. Maximal degree in co-relation 91490. Up to 8073 conditions per place. [2024-01-31 16:48:08,104 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 603 selfloop transitions, 80 changer transitions 4/688 dead transitions. [2024-01-31 16:48:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 688 transitions, 20494 flow [2024-01-31 16:48:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-01-31 16:48:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-01-31 16:48:08,105 INFO L175 Difference]: Start difference. First operand has 383 places, 664 transitions, 19107 flow. Second operand 11 states and 110 transitions. [2024-01-31 16:48:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 688 transitions, 20494 flow [2024-01-31 16:48:09,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 688 transitions, 19913 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:09,411 INFO L231 Difference]: Finished difference. Result has 383 places, 660 transitions, 18588 flow [2024-01-31 16:48:09,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18447, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18588, PETRI_PLACES=383, PETRI_TRANSITIONS=660} [2024-01-31 16:48:09,413 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 356 predicate places. [2024-01-31 16:48:09,413 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 660 transitions, 18588 flow [2024-01-31 16:48:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:09,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:09,413 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:09,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-01-31 16:48:09,413 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:09,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2127172208, now seen corresponding path program 8 times [2024-01-31 16:48:09,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:09,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22835794] [2024-01-31 16:48:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:09,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22835794] [2024-01-31 16:48:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22835794] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:09,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:09,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:48:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096709986] [2024-01-31 16:48:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:09,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:48:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:09,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:48:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:09,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:09,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 660 transitions, 18588 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:09,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:09,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:12,462 INFO L124 PetriNetUnfolderBase]: 5849/10650 cut-off events. [2024-01-31 16:48:12,463 INFO L125 PetriNetUnfolderBase]: For 226050/226050 co-relation queries the response was YES. [2024-01-31 16:48:12,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89206 conditions, 10650 events. 5849/10650 cut-off events. For 226050/226050 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 78893 event pairs, 2760 based on Foata normal form. 4/10654 useless extension candidates. Maximal degree in co-relation 89058. Up to 8088 conditions per place. [2024-01-31 16:48:12,583 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 539 selfloop transitions, 130 changer transitions 3/673 dead transitions. [2024-01-31 16:48:12,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 673 transitions, 19754 flow [2024-01-31 16:48:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-01-31 16:48:12,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32601880877742945 [2024-01-31 16:48:12,584 INFO L175 Difference]: Start difference. First operand has 383 places, 660 transitions, 18588 flow. Second operand 11 states and 104 transitions. [2024-01-31 16:48:12,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 673 transitions, 19754 flow [2024-01-31 16:48:13,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 673 transitions, 19534 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:13,930 INFO L231 Difference]: Finished difference. Result has 378 places, 651 transitions, 18354 flow [2024-01-31 16:48:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18111, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18354, PETRI_PLACES=378, PETRI_TRANSITIONS=651} [2024-01-31 16:48:13,932 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 351 predicate places. [2024-01-31 16:48:13,932 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 651 transitions, 18354 flow [2024-01-31 16:48:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:13,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:13,932 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-01-31 16:48:13,933 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash -785016143, now seen corresponding path program 8 times [2024-01-31 16:48:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942147758] [2024-01-31 16:48:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:14,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:14,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942147758] [2024-01-31 16:48:14,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942147758] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:14,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561417427] [2024-01-31 16:48:14,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:14,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:14,309 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) [2024-01-31 16:48:14,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:48:14,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:14,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:14,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:14,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:14,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:14,613 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 70 [2024-01-31 16:48:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:14,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:14,703 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:14,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 95 [2024-01-31 16:48:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561417427] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:14,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 17 [2024-01-31 16:48:14,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239936258] [2024-01-31 16:48:14,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:48:14,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:48:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:48:14,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:14,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 651 transitions, 18354 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:14,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:14,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:17,409 INFO L124 PetriNetUnfolderBase]: 5855/10736 cut-off events. [2024-01-31 16:48:17,409 INFO L125 PetriNetUnfolderBase]: For 231607/231607 co-relation queries the response was YES. [2024-01-31 16:48:17,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89158 conditions, 10736 events. 5855/10736 cut-off events. For 231607/231607 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 80253 event pairs, 1447 based on Foata normal form. 28/10764 useless extension candidates. Maximal degree in co-relation 89010. Up to 3837 conditions per place. [2024-01-31 16:48:17,542 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 393 selfloop transitions, 301 changer transitions 0/695 dead transitions. [2024-01-31 16:48:17,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 695 transitions, 20027 flow [2024-01-31 16:48:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:48:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:48:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-01-31 16:48:17,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2024-01-31 16:48:17,544 INFO L175 Difference]: Start difference. First operand has 378 places, 651 transitions, 18354 flow. Second operand 10 states and 126 transitions. [2024-01-31 16:48:17,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 695 transitions, 20027 flow [2024-01-31 16:48:18,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 695 transitions, 19529 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:18,909 INFO L231 Difference]: Finished difference. Result has 378 places, 649 transitions, 18529 flow [2024-01-31 16:48:18,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17589, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18529, PETRI_PLACES=378, PETRI_TRANSITIONS=649} [2024-01-31 16:48:18,910 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 351 predicate places. [2024-01-31 16:48:18,910 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 649 transitions, 18529 flow [2024-01-31 16:48:18,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:18,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:18,910 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:18,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:19,123 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:19,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash 764633650, now seen corresponding path program 9 times [2024-01-31 16:48:19,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198706376] [2024-01-31 16:48:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:19,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198706376] [2024-01-31 16:48:19,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198706376] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:19,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069055006] [2024-01-31 16:48:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:19,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:19,458 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) [2024-01-31 16:48:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:48:19,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:19,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:19,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:19,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:19,722 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 70 [2024-01-31 16:48:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:19,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:19,811 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:19,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 95 [2024-01-31 16:48:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069055006] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:19,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:19,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 17 [2024-01-31 16:48:19,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783923527] [2024-01-31 16:48:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:48:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:48:19,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:48:19,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:19,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 649 transitions, 18529 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:19,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:19,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:19,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:22,357 INFO L124 PetriNetUnfolderBase]: 5976/10983 cut-off events. [2024-01-31 16:48:22,357 INFO L125 PetriNetUnfolderBase]: For 241228/241228 co-relation queries the response was YES. [2024-01-31 16:48:22,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92445 conditions, 10983 events. 5976/10983 cut-off events. For 241228/241228 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 82595 event pairs, 1383 based on Foata normal form. 38/11021 useless extension candidates. Maximal degree in co-relation 92295. Up to 4097 conditions per place. [2024-01-31 16:48:22,528 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 442 selfloop transitions, 284 changer transitions 0/727 dead transitions. [2024-01-31 16:48:22,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 727 transitions, 20759 flow [2024-01-31 16:48:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:22,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-01-31 16:48:22,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47962382445141066 [2024-01-31 16:48:22,530 INFO L175 Difference]: Start difference. First operand has 378 places, 649 transitions, 18529 flow. Second operand 11 states and 153 transitions. [2024-01-31 16:48:22,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 727 transitions, 20759 flow [2024-01-31 16:48:24,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 727 transitions, 20407 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-31 16:48:24,206 INFO L231 Difference]: Finished difference. Result has 385 places, 656 transitions, 19062 flow [2024-01-31 16:48:24,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18189, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19062, PETRI_PLACES=385, PETRI_TRANSITIONS=656} [2024-01-31 16:48:24,207 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 358 predicate places. [2024-01-31 16:48:24,208 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 656 transitions, 19062 flow [2024-01-31 16:48:24,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:24,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:24,208 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:24,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:24,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:48:24,422 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:24,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2014432296, now seen corresponding path program 10 times [2024-01-31 16:48:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224036961] [2024-01-31 16:48:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:24,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:24,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224036961] [2024-01-31 16:48:24,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224036961] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:24,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346391132] [2024-01-31 16:48:24,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:24,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:24,714 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) [2024-01-31 16:48:24,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:48:24,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:24,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:48:24,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:24,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:24,993 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:48:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:25,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:25,098 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:48:25,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 87 [2024-01-31 16:48:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346391132] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:25,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:48:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2024-01-31 16:48:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022595729] [2024-01-31 16:48:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:25,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:48:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:48:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:48:25,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:25,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 656 transitions, 19062 flow. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:25,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:25,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:25,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:27,727 INFO L124 PetriNetUnfolderBase]: 6097/11230 cut-off events. [2024-01-31 16:48:27,728 INFO L125 PetriNetUnfolderBase]: For 249471/249471 co-relation queries the response was YES. [2024-01-31 16:48:27,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96732 conditions, 11230 events. 6097/11230 cut-off events. For 249471/249471 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 85117 event pairs, 1361 based on Foata normal form. 38/11268 useless extension candidates. Maximal degree in co-relation 96579. Up to 4097 conditions per place. [2024-01-31 16:48:27,885 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 430 selfloop transitions, 302 changer transitions 0/733 dead transitions. [2024-01-31 16:48:27,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 733 transitions, 21301 flow [2024-01-31 16:48:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-01-31 16:48:27,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608150470219436 [2024-01-31 16:48:27,886 INFO L175 Difference]: Start difference. First operand has 385 places, 656 transitions, 19062 flow. Second operand 11 states and 147 transitions. [2024-01-31 16:48:27,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 733 transitions, 21301 flow [2024-01-31 16:48:29,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 733 transitions, 20990 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-31 16:48:29,659 INFO L231 Difference]: Finished difference. Result has 390 places, 662 transitions, 19671 flow [2024-01-31 16:48:29,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18755, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19671, PETRI_PLACES=390, PETRI_TRANSITIONS=662} [2024-01-31 16:48:29,659 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 363 predicate places. [2024-01-31 16:48:29,659 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 662 transitions, 19671 flow [2024-01-31 16:48:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:29,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:29,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:29,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:29,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:48:29,862 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:29,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 591283239, now seen corresponding path program 9 times [2024-01-31 16:48:29,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:29,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537828095] [2024-01-31 16:48:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:29,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537828095] [2024-01-31 16:48:30,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537828095] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:30,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099903751] [2024-01-31 16:48:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:30,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:30,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:30,174 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) [2024-01-31 16:48:30,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:48:30,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:30,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:30,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:30,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:30,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:30,473 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 70 [2024-01-31 16:48:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:30,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:30,591 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:30,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:48:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099903751] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:30,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:30,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 17 [2024-01-31 16:48:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114877450] [2024-01-31 16:48:30,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:48:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:48:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:48:30,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:30,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 662 transitions, 19671 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:30,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:30,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:30,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:33,885 INFO L124 PetriNetUnfolderBase]: 6253/11530 cut-off events. [2024-01-31 16:48:33,885 INFO L125 PetriNetUnfolderBase]: For 262624/262624 co-relation queries the response was YES. [2024-01-31 16:48:33,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101528 conditions, 11530 events. 6253/11530 cut-off events. For 262624/262624 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 87944 event pairs, 1245 based on Foata normal form. 30/11560 useless extension candidates. Maximal degree in co-relation 101373. Up to 3892 conditions per place. [2024-01-31 16:48:34,033 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 343 selfloop transitions, 447 changer transitions 1/792 dead transitions. [2024-01-31 16:48:34,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 792 transitions, 22511 flow [2024-01-31 16:48:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:48:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:48:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 263 transitions. [2024-01-31 16:48:34,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39430284857571213 [2024-01-31 16:48:34,034 INFO L175 Difference]: Start difference. First operand has 390 places, 662 transitions, 19671 flow. Second operand 23 states and 263 transitions. [2024-01-31 16:48:34,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 792 transitions, 22511 flow [2024-01-31 16:48:35,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 792 transitions, 21984 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-31 16:48:35,940 INFO L231 Difference]: Finished difference. Result has 410 places, 687 transitions, 21263 flow [2024-01-31 16:48:35,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19131, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=21263, PETRI_PLACES=410, PETRI_TRANSITIONS=687} [2024-01-31 16:48:35,941 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 383 predicate places. [2024-01-31 16:48:35,941 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 687 transitions, 21263 flow [2024-01-31 16:48:35,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:35,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:35,942 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:35,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:36,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 16:48:36,154 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:36,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1583085660, now seen corresponding path program 11 times [2024-01-31 16:48:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840593877] [2024-01-31 16:48:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:36,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840593877] [2024-01-31 16:48:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840593877] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251196364] [2024-01-31 16:48:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:36,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:36,657 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) [2024-01-31 16:48:36,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:48:36,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:48:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:36,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:48:36,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:36,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:36,975 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:48:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:36,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:37,075 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:37,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:48:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251196364] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:37,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2024-01-31 16:48:37,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091424089] [2024-01-31 16:48:37,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:37,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:48:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:48:37,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:48:37,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:37,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 687 transitions, 21263 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:37,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:37,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:37,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:40,504 INFO L124 PetriNetUnfolderBase]: 6386/11797 cut-off events. [2024-01-31 16:48:40,504 INFO L125 PetriNetUnfolderBase]: For 302903/302903 co-relation queries the response was YES. [2024-01-31 16:48:40,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106358 conditions, 11797 events. 6386/11797 cut-off events. For 302903/302903 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 90821 event pairs, 1184 based on Foata normal form. 40/11837 useless extension candidates. Maximal degree in co-relation 106198. Up to 3595 conditions per place. [2024-01-31 16:48:40,669 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 389 selfloop transitions, 422 changer transitions 1/813 dead transitions. [2024-01-31 16:48:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 813 transitions, 24030 flow [2024-01-31 16:48:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:48:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:48:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 254 transitions. [2024-01-31 16:48:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808095952023988 [2024-01-31 16:48:40,671 INFO L175 Difference]: Start difference. First operand has 410 places, 687 transitions, 21263 flow. Second operand 23 states and 254 transitions. [2024-01-31 16:48:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 813 transitions, 24030 flow [2024-01-31 16:48:43,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 813 transitions, 23586 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-01-31 16:48:43,078 INFO L231 Difference]: Finished difference. Result has 419 places, 709 transitions, 22649 flow [2024-01-31 16:48:43,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=20745, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=22649, PETRI_PLACES=419, PETRI_TRANSITIONS=709} [2024-01-31 16:48:43,078 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 392 predicate places. [2024-01-31 16:48:43,079 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 709 transitions, 22649 flow [2024-01-31 16:48:43,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:43,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:43,079 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:43,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:43,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:43,292 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:43,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 216876773, now seen corresponding path program 10 times [2024-01-31 16:48:43,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:43,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041954148] [2024-01-31 16:48:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:43,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041954148] [2024-01-31 16:48:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041954148] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758427334] [2024-01-31 16:48:43,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:43,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:43,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:43,574 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) [2024-01-31 16:48:43,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:48:43,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:43,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:48:43,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:43,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:43,943 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:43,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:48:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758427334] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:43,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-01-31 16:48:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101349901] [2024-01-31 16:48:43,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:43,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:48:43,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:48:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:48:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:43,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 709 transitions, 22649 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:43,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:43,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:43,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:48,082 INFO L124 PetriNetUnfolderBase]: 6763/12508 cut-off events. [2024-01-31 16:48:48,082 INFO L125 PetriNetUnfolderBase]: For 347786/347786 co-relation queries the response was YES. [2024-01-31 16:48:48,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115098 conditions, 12508 events. 6763/12508 cut-off events. For 347786/347786 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 97258 event pairs, 1381 based on Foata normal form. 52/12560 useless extension candidates. Maximal degree in co-relation 114937. Up to 3920 conditions per place. [2024-01-31 16:48:48,227 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 390 selfloop transitions, 452 changer transitions 0/843 dead transitions. [2024-01-31 16:48:48,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 843 transitions, 26068 flow [2024-01-31 16:48:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:48:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:48:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 224 transitions. [2024-01-31 16:48:48,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40653357531760437 [2024-01-31 16:48:48,229 INFO L175 Difference]: Start difference. First operand has 419 places, 709 transitions, 22649 flow. Second operand 19 states and 224 transitions. [2024-01-31 16:48:48,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 843 transitions, 26068 flow [2024-01-31 16:48:50,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 843 transitions, 25813 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:50,633 INFO L231 Difference]: Finished difference. Result has 433 places, 750 transitions, 24902 flow [2024-01-31 16:48:50,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22345, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24902, PETRI_PLACES=433, PETRI_TRANSITIONS=750} [2024-01-31 16:48:50,634 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 406 predicate places. [2024-01-31 16:48:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 750 transitions, 24902 flow [2024-01-31 16:48:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:50,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:50,634 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:50,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:50,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:50,846 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:50,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:50,846 INFO L85 PathProgramCache]: Analyzing trace with hash 99950722, now seen corresponding path program 12 times [2024-01-31 16:48:50,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:50,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392527503] [2024-01-31 16:48:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:50,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392527503] [2024-01-31 16:48:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392527503] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226578308] [2024-01-31 16:48:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:48:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:51,169 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) [2024-01-31 16:48:51,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:48:51,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:48:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:51,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:51,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:51,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:51,529 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-01-31 16:48:51,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-01-31 16:48:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226578308] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:51,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:51,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 16 [2024-01-31 16:48:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237301504] [2024-01-31 16:48:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 16:48:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 16:48:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:48:51,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:51,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 750 transitions, 24902 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:51,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:51,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:55,465 INFO L124 PetriNetUnfolderBase]: 6495/11958 cut-off events. [2024-01-31 16:48:55,465 INFO L125 PetriNetUnfolderBase]: For 374009/374009 co-relation queries the response was YES. [2024-01-31 16:48:55,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115882 conditions, 11958 events. 6495/11958 cut-off events. For 374009/374009 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 91781 event pairs, 1249 based on Foata normal form. 68/12026 useless extension candidates. Maximal degree in co-relation 115716. Up to 3874 conditions per place. [2024-01-31 16:48:55,605 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 417 selfloop transitions, 392 changer transitions 0/810 dead transitions. [2024-01-31 16:48:55,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 810 transitions, 26660 flow [2024-01-31 16:48:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:48:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:48:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 180 transitions. [2024-01-31 16:48:55,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-01-31 16:48:55,607 INFO L175 Difference]: Start difference. First operand has 433 places, 750 transitions, 24902 flow. Second operand 16 states and 180 transitions. [2024-01-31 16:48:55,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 810 transitions, 26660 flow [2024-01-31 16:48:57,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 810 transitions, 25850 flow, removed 31 selfloop flow, removed 13 redundant places. [2024-01-31 16:48:57,828 INFO L231 Difference]: Finished difference. Result has 435 places, 741 transitions, 24797 flow [2024-01-31 16:48:57,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23717, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24797, PETRI_PLACES=435, PETRI_TRANSITIONS=741} [2024-01-31 16:48:57,829 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 408 predicate places. [2024-01-31 16:48:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 741 transitions, 24797 flow [2024-01-31 16:48:57,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:57,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:57,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:57,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-01-31 16:48:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-01-31 16:48:58,040 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:58,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1478014169, now seen corresponding path program 11 times [2024-01-31 16:48:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:58,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094618998] [2024-01-31 16:48:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:58,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:58,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094618998] [2024-01-31 16:48:58,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094618998] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:48:58,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:48:58,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:48:58,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128316803] [2024-01-31 16:48:58,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:48:58,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:48:58,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:58,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:48:58,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:48:58,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:48:58,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 741 transitions, 24797 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:48:58,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:58,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:48:58,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:01,847 INFO L124 PetriNetUnfolderBase]: 6399/11760 cut-off events. [2024-01-31 16:49:01,847 INFO L125 PetriNetUnfolderBase]: For 355803/355803 co-relation queries the response was YES. [2024-01-31 16:49:01,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115635 conditions, 11760 events. 6399/11760 cut-off events. For 355803/355803 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 89699 event pairs, 3215 based on Foata normal form. 6/11766 useless extension candidates. Maximal degree in co-relation 115469. Up to 9763 conditions per place. [2024-01-31 16:49:02,100 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 578 selfloop transitions, 184 changer transitions 4/767 dead transitions. [2024-01-31 16:49:02,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 767 transitions, 26175 flow [2024-01-31 16:49:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:49:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:49:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-01-31 16:49:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-01-31 16:49:02,102 INFO L175 Difference]: Start difference. First operand has 435 places, 741 transitions, 24797 flow. Second operand 12 states and 129 transitions. [2024-01-31 16:49:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 767 transitions, 26175 flow [2024-01-31 16:49:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 767 transitions, 24879 flow, removed 50 selfloop flow, removed 21 redundant places. [2024-01-31 16:49:04,174 INFO L231 Difference]: Finished difference. Result has 424 places, 732 transitions, 23581 flow [2024-01-31 16:49:04,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23242, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23581, PETRI_PLACES=424, PETRI_TRANSITIONS=732} [2024-01-31 16:49:04,174 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 397 predicate places. [2024-01-31 16:49:04,175 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 732 transitions, 23581 flow [2024-01-31 16:49:04,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:04,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:04,175 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:04,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-01-31 16:49:04,175 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:04,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1454779014, now seen corresponding path program 13 times [2024-01-31 16:49:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:04,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52708943] [2024-01-31 16:49:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52708943] [2024-01-31 16:49:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52708943] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:49:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025444553] [2024-01-31 16:49:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:04,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:49:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:49:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:49:04,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:49:04,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 732 transitions, 23581 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:04,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:04,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:49:04,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:08,360 INFO L124 PetriNetUnfolderBase]: 6531/12051 cut-off events. [2024-01-31 16:49:08,360 INFO L125 PetriNetUnfolderBase]: For 338887/338887 co-relation queries the response was YES. [2024-01-31 16:49:08,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113080 conditions, 12051 events. 6531/12051 cut-off events. For 338887/338887 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 92887 event pairs, 3158 based on Foata normal form. 4/12055 useless extension candidates. Maximal degree in co-relation 112923. Up to 9516 conditions per place. [2024-01-31 16:49:08,496 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 659 selfloop transitions, 114 changer transitions 4/778 dead transitions. [2024-01-31 16:49:08,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 778 transitions, 25488 flow [2024-01-31 16:49:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:49:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:49:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 135 transitions. [2024-01-31 16:49:08,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33251231527093594 [2024-01-31 16:49:08,497 INFO L175 Difference]: Start difference. First operand has 424 places, 732 transitions, 23581 flow. Second operand 14 states and 135 transitions. [2024-01-31 16:49:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 778 transitions, 25488 flow [2024-01-31 16:49:10,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 778 transitions, 25260 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:10,727 INFO L231 Difference]: Finished difference. Result has 426 places, 729 transitions, 23494 flow [2024-01-31 16:49:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23309, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23494, PETRI_PLACES=426, PETRI_TRANSITIONS=729} [2024-01-31 16:49:10,728 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 399 predicate places. [2024-01-31 16:49:10,728 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 729 transitions, 23494 flow [2024-01-31 16:49:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:10,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:10,729 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:10,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-01-31 16:49:10,729 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:10,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -611170627, now seen corresponding path program 12 times [2024-01-31 16:49:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331251387] [2024-01-31 16:49:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:10,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:11,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:11,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331251387] [2024-01-31 16:49:11,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331251387] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:11,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828646346] [2024-01-31 16:49:11,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:11,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:11,006 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) [2024-01-31 16:49:11,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:49:11,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:11,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:11,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:49:11,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:11,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:11,412 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:49:11,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:49:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828646346] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:11,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2024-01-31 16:49:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297721736] [2024-01-31 16:49:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 16:49:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 16:49:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:49:11,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:49:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 729 transitions, 23494 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:11,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:11,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:49:11,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:15,079 INFO L124 PetriNetUnfolderBase]: 6265/11575 cut-off events. [2024-01-31 16:49:15,079 INFO L125 PetriNetUnfolderBase]: For 342517/342517 co-relation queries the response was YES. [2024-01-31 16:49:15,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109930 conditions, 11575 events. 6265/11575 cut-off events. For 342517/342517 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 88742 event pairs, 691 based on Foata normal form. 74/11649 useless extension candidates. Maximal degree in co-relation 109773. Up to 3658 conditions per place. [2024-01-31 16:49:15,212 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 175 selfloop transitions, 624 changer transitions 1/801 dead transitions. [2024-01-31 16:49:15,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 801 transitions, 25570 flow [2024-01-31 16:49:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:49:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:49:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 189 transitions. [2024-01-31 16:49:15,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-01-31 16:49:15,214 INFO L175 Difference]: Start difference. First operand has 426 places, 729 transitions, 23494 flow. Second operand 18 states and 189 transitions. [2024-01-31 16:49:15,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 801 transitions, 25570 flow [2024-01-31 16:49:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 801 transitions, 25097 flow, removed 8 selfloop flow, removed 21 redundant places. [2024-01-31 16:49:17,469 INFO L231 Difference]: Finished difference. Result has 422 places, 735 transitions, 24561 flow [2024-01-31 16:49:17,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22826, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=24561, PETRI_PLACES=422, PETRI_TRANSITIONS=735} [2024-01-31 16:49:17,470 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 395 predicate places. [2024-01-31 16:49:17,470 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 735 transitions, 24561 flow [2024-01-31 16:49:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:17,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:17,471 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:17,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:17,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-31 16:49:17,681 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:17,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1137303004, now seen corresponding path program 14 times [2024-01-31 16:49:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:17,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932833918] [2024-01-31 16:49:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:18,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:18,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932833918] [2024-01-31 16:49:18,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932833918] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:18,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:18,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:49:18,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405847134] [2024-01-31 16:49:18,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:18,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:49:18,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:49:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:49:18,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:49:18,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 735 transitions, 24561 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:18,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:18,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:49:18,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:21,333 INFO L124 PetriNetUnfolderBase]: 6257/11563 cut-off events. [2024-01-31 16:49:21,333 INFO L125 PetriNetUnfolderBase]: For 353124/353124 co-relation queries the response was YES. [2024-01-31 16:49:21,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112242 conditions, 11563 events. 6257/11563 cut-off events. For 353124/353124 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 88619 event pairs, 2035 based on Foata normal form. 4/11567 useless extension candidates. Maximal degree in co-relation 112087. Up to 5606 conditions per place. [2024-01-31 16:49:21,461 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 441 selfloop transitions, 341 changer transitions 4/787 dead transitions. [2024-01-31 16:49:21,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 787 transitions, 26347 flow [2024-01-31 16:49:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:49:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:49:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-01-31 16:49:21,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-01-31 16:49:21,462 INFO L175 Difference]: Start difference. First operand has 422 places, 735 transitions, 24561 flow. Second operand 14 states and 147 transitions. [2024-01-31 16:49:21,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 787 transitions, 26347 flow [2024-01-31 16:49:23,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 787 transitions, 25734 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:23,702 INFO L231 Difference]: Finished difference. Result has 424 places, 735 transitions, 24618 flow [2024-01-31 16:49:23,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23869, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24618, PETRI_PLACES=424, PETRI_TRANSITIONS=735} [2024-01-31 16:49:23,703 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 397 predicate places. [2024-01-31 16:49:23,703 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 735 transitions, 24618 flow [2024-01-31 16:49:23,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:23,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:23,703 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:23,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-01-31 16:49:23,703 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:23,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1672771069, now seen corresponding path program 13 times [2024-01-31 16:49:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297923784] [2024-01-31 16:49:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:24,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297923784] [2024-01-31 16:49:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297923784] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953699954] [2024-01-31 16:49:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:24,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:24,133 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) [2024-01-31 16:49:24,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:49:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:24,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 16:49:24,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:24,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:24,443 INFO L378 Elim1Store]: Elim1 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 118 treesize of output 74 [2024-01-31 16:49:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:24,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:24,598 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:49:24,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:49:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953699954] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:24,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:24,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-01-31 16:49:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517132176] [2024-01-31 16:49:24,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:49:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:49:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:49:24,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:49:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 735 transitions, 24618 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:24,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:24,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:49:24,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:28,966 INFO L124 PetriNetUnfolderBase]: 7685/13941 cut-off events. [2024-01-31 16:49:28,966 INFO L125 PetriNetUnfolderBase]: For 426445/426445 co-relation queries the response was YES. [2024-01-31 16:49:29,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139663 conditions, 13941 events. 7685/13941 cut-off events. For 426445/426445 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 107499 event pairs, 1092 based on Foata normal form. 30/13971 useless extension candidates. Maximal degree in co-relation 139511. Up to 3217 conditions per place. [2024-01-31 16:49:29,134 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 356 selfloop transitions, 599 changer transitions 4/960 dead transitions. [2024-01-31 16:49:29,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 960 transitions, 30664 flow [2024-01-31 16:49:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:49:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:49:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 301 transitions. [2024-01-31 16:49:29,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384418901660281 [2024-01-31 16:49:29,145 INFO L175 Difference]: Start difference. First operand has 424 places, 735 transitions, 24618 flow. Second operand 27 states and 301 transitions. [2024-01-31 16:49:29,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 960 transitions, 30664 flow [2024-01-31 16:49:31,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 960 transitions, 30438 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-01-31 16:49:31,736 INFO L231 Difference]: Finished difference. Result has 440 places, 832 transitions, 29778 flow [2024-01-31 16:49:31,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24306, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29778, PETRI_PLACES=440, PETRI_TRANSITIONS=832} [2024-01-31 16:49:31,737 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 413 predicate places. [2024-01-31 16:49:31,737 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 832 transitions, 29778 flow [2024-01-31 16:49:31,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:31,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:31,737 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:31,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-31 16:49:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:31,949 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1336934637, now seen corresponding path program 14 times [2024-01-31 16:49:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23005221] [2024-01-31 16:49:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23005221] [2024-01-31 16:49:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23005221] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:49:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:49:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-31 16:49:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426390938] [2024-01-31 16:49:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:49:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:49:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:49:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:49:32,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-01-31 16:49:32,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 832 transitions, 29778 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:49:32,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:32,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-01-31 16:49:32,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand