/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 23:02:19,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 23:02:19,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 23:02:19,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 23:02:19,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 23:02:19,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 23:02:19,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 23:02:19,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 23:02:19,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 23:02:19,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 23:02:19,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 23:02:19,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 23:02:19,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 23:02:19,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 23:02:19,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 23:02:19,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 23:02:19,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 23:02:19,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 23:02:19,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 23:02:19,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 23:02:19,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 23:02:19,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 23:02:19,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 23:02:19,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 23:02:19,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 23:02:19,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 23:02:19,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 23:02:19,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 23:02:19,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 23:02:19,270 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 23:02:19,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 23:02:19,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 23:02:19,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 23:02:19,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 23:02:19,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 23:02:19,273 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 23:02:19,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 23:02:19,273 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 23:02:19,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 23:02:19,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 23:02:19,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 23:02:19,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 23:02:19,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:02:19,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 23:02:19,275 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 23:02:19,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 23:02:19,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 23:02:19,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 23:02:19,468 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 23:02:19,470 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 23:02:19,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-01-27 23:02:20,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 23:02:20,573 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 23:02:20,573 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-01-27 23:02:20,577 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7154b61b/dcd973ec58684c54bd47842ace5ac589/FLAG1d7664696 [2023-01-27 23:02:20,586 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7154b61b/dcd973ec58684c54bd47842ace5ac589 [2023-01-27 23:02:20,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 23:02:20,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 23:02:20,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 23:02:20,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 23:02:20,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 23:02:20,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad46121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20, skipping insertion in model container [2023-01-27 23:02:20,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 23:02:20,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 23:02:20,707 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-01-27 23:02:20,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:02:20,718 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 23:02:20,730 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2433,2446] [2023-01-27 23:02:20,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 23:02:20,738 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:02:20,738 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 23:02:20,742 INFO L208 MainTranslator]: Completed translation [2023-01-27 23:02:20,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20 WrapperNode [2023-01-27 23:02:20,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 23:02:20,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 23:02:20,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 23:02:20,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 23:02:20,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,765 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 135 [2023-01-27 23:02:20,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 23:02:20,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 23:02:20,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 23:02:20,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 23:02:20,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 23:02:20,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 23:02:20,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 23:02:20,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 23:02:20,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (1/1) ... [2023-01-27 23:02:20,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 23:02:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:20,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 23:02:20,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 23:02:20,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 23:02:20,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 23:02:20,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 23:02:20,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 23:02:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 23:02:20,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 23:02:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 23:02:20,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 23:02:20,840 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 23:02:20,902 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 23:02:20,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 23:02:21,076 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 23:02:21,197 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 23:02:21,197 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 23:02:21,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:02:21 BoogieIcfgContainer [2023-01-27 23:02:21,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 23:02:21,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 23:02:21,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 23:02:21,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 23:02:21,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:02:20" (1/3) ... [2023-01-27 23:02:21,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9c7f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:02:21, skipping insertion in model container [2023-01-27 23:02:21,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:02:20" (2/3) ... [2023-01-27 23:02:21,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9c7f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:02:21, skipping insertion in model container [2023-01-27 23:02:21,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:02:21" (3/3) ... [2023-01-27 23:02:21,211 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-01-27 23:02:21,222 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 23:02:21,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 23:02:21,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 23:02:21,287 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 23:02:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 236 flow [2023-01-27 23:02:21,363 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-01-27 23:02:21,363 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:02:21,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 108 events. 9/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-01-27 23:02:21,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 110 transitions, 236 flow [2023-01-27 23:02:21,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 100 transitions, 212 flow [2023-01-27 23:02:21,371 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 23:02:21,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 100 transitions, 212 flow [2023-01-27 23:02:21,378 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 100 transitions, 212 flow [2023-01-27 23:02:21,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 100 transitions, 212 flow [2023-01-27 23:02:21,404 INFO L130 PetriNetUnfolder]: 9/100 cut-off events. [2023-01-27 23:02:21,405 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:02:21,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 9/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-01-27 23:02:21,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-01-27 23:02:23,998 INFO L134 LiptonReduction]: Checked pairs total: 513 [2023-01-27 23:02:23,998 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-27 23:02:24,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 23:02:24,012 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21c9a2f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 23:02:24,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 23:02:24,016 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-27 23:02:24,016 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 23:02:24,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:24,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:24,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:24,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1991554592, now seen corresponding path program 1 times [2023-01-27 23:02:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:24,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229647634] [2023-01-27 23:02:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:24,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:24,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229647634] [2023-01-27 23:02:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229647634] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:02:24,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:02:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:02:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981525806] [2023-01-27 23:02:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:02:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:02:24,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:02:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:02:24,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 211 [2023-01-27 23:02:24,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:24,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 211 [2023-01-27 23:02:24,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:24,595 INFO L130 PetriNetUnfolder]: 59/111 cut-off events. [2023-01-27 23:02:24,595 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-27 23:02:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 111 events. 59/111 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 100. Up to 43 conditions per place. [2023-01-27 23:02:24,597 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 28 selfloop transitions, 4 changer transitions 4/36 dead transitions. [2023-01-27 23:02:24,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 36 transitions, 174 flow [2023-01-27 23:02:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:02:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:02:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-01-27 23:02:24,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43838862559241704 [2023-01-27 23:02:24,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-01-27 23:02:24,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-01-27 23:02:24,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:24,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-01-27 23:02:24,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,625 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,626 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 4 states and 370 transitions. [2023-01-27 23:02:24,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 36 transitions, 174 flow [2023-01-27 23:02:24,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 23:02:24,630 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 61 flow [2023-01-27 23:02:24,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=61, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-27 23:02:24,633 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-27 23:02:24,633 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 61 flow [2023-01-27 23:02:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:24,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:24,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 23:02:24,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash 220979605, now seen corresponding path program 1 times [2023-01-27 23:02:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606012909] [2023-01-27 23:02:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:24,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:24,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606012909] [2023-01-27 23:02:24,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606012909] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:02:24,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:02:24,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 23:02:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257751237] [2023-01-27 23:02:24,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:02:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 23:02:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 23:02:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 23:02:24,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:02:24,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:24,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:02:24,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:24,745 INFO L130 PetriNetUnfolder]: 87/173 cut-off events. [2023-01-27 23:02:24,745 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-27 23:02:24,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 173 events. 87/173 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 566 event pairs, 26 based on Foata normal form. 12/157 useless extension candidates. Maximal degree in co-relation 224. Up to 117 conditions per place. [2023-01-27 23:02:24,747 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 20 selfloop transitions, 2 changer transitions 5/27 dead transitions. [2023-01-27 23:02:24,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 136 flow [2023-01-27 23:02:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 23:02:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 23:02:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-01-27 23:02:24,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49447077409162715 [2023-01-27 23:02:24,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-01-27 23:02:24,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-01-27 23:02:24,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:24,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-01-27 23:02:24,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,753 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 61 flow. Second operand 3 states and 313 transitions. [2023-01-27 23:02:24,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 136 flow [2023-01-27 23:02:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 23:02:24,755 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 75 flow [2023-01-27 23:02:24,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-01-27 23:02:24,756 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-01-27 23:02:24,756 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 75 flow [2023-01-27 23:02:24,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:24,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:24,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 23:02:24,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:24,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2120815196, now seen corresponding path program 1 times [2023-01-27 23:02:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982275755] [2023-01-27 23:02:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:24,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982275755] [2023-01-27 23:02:24,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982275755] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 23:02:24,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 23:02:24,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 23:02:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359422701] [2023-01-27 23:02:24,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 23:02:24,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:02:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:02:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:02:24,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:02:24,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:24,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:02:24,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:24,948 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-01-27 23:02:24,949 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-01-27 23:02:24,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 130 events. 61/130 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 355 event pairs, 44 based on Foata normal form. 6/136 useless extension candidates. Maximal degree in co-relation 249. Up to 103 conditions per place. [2023-01-27 23:02:24,952 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-01-27 23:02:24,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 148 flow [2023-01-27 23:02:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:02:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:02:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-01-27 23:02:24,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158767772511848 [2023-01-27 23:02:24,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-01-27 23:02:24,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-01-27 23:02:24,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:24,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-01-27 23:02:24,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,957 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 75 flow. Second operand 4 states and 351 transitions. [2023-01-27 23:02:24,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 148 flow [2023-01-27 23:02:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 28 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 23:02:24,958 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 76 flow [2023-01-27 23:02:24,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-01-27 23:02:24,959 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-01-27 23:02:24,961 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 76 flow [2023-01-27 23:02:24,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:24,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:24,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 23:02:24,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:24,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2067904534, now seen corresponding path program 1 times [2023-01-27 23:02:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:24,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250501766] [2023-01-27 23:02:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:24,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250501766] [2023-01-27 23:02:25,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250501766] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:25,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571166987] [2023-01-27 23:02:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:25,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:25,177 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) [2023-01-27 23:02:25,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 23:02:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-27 23:02:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:25,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:02:25,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:02:25,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:02:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:25,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:25,558 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-01-27 23:02:25,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:25,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-01-27 23:02:25,576 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:02:25,576 INFO L350 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 324 treesize of output 289 [2023-01-27 23:02:25,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:25,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 86 [2023-01-27 23:02:25,599 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-27 23:02:25,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 67 [2023-01-27 23:02:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-27 23:02:25,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571166987] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:25,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:25,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-01-27 23:02:25,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352451818] [2023-01-27 23:02:25,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:25,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:02:25,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:02:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=104, Unknown=7, NotChecked=22, Total=182 [2023-01-27 23:02:25,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-27 23:02:25,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 76 flow. Second operand has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:25,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:25,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-27 23:02:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:25,695 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1)))) (= 5 (select .cse0 (+ c_~queue~0.offset .cse1)))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-01-27 23:02:25,809 INFO L130 PetriNetUnfolder]: 136/258 cut-off events. [2023-01-27 23:02:25,810 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2023-01-27 23:02:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 258 events. 136/258 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 962 event pairs, 21 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 665. Up to 79 conditions per place. [2023-01-27 23:02:25,812 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 39 selfloop transitions, 16 changer transitions 14/69 dead transitions. [2023-01-27 23:02:25,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 69 transitions, 363 flow [2023-01-27 23:02:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:02:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:02:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 681 transitions. [2023-01-27 23:02:25,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358609794628752 [2023-01-27 23:02:25,814 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 681 transitions. [2023-01-27 23:02:25,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 681 transitions. [2023-01-27 23:02:25,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:25,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 681 transitions. [2023-01-27 23:02:25,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 75.66666666666667) internal successors, (681), 9 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:25,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:25,819 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:25,819 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 76 flow. Second operand 9 states and 681 transitions. [2023-01-27 23:02:25,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 69 transitions, 363 flow [2023-01-27 23:02:25,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 69 transitions, 353 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-27 23:02:25,822 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 185 flow [2023-01-27 23:02:25,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=185, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-01-27 23:02:25,823 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2023-01-27 23:02:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 185 flow [2023-01-27 23:02:25,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.14285714285714) internal successors, (982), 14 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:25,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:25,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:25,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 23:02:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:26,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:26,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2125347476, now seen corresponding path program 2 times [2023-01-27 23:02:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:26,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121817076] [2023-01-27 23:02:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121817076] [2023-01-27 23:02:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121817076] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794013105] [2023-01-27 23:02:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:02:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:26,283 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) [2023-01-27 23:02:26,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 23:02:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:02:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 23:02:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:26,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:02:26,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-27 23:02:26,457 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:26,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:26,458 INFO L350 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 17 treesize of output 10 [2023-01-27 23:02:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:26,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:26,506 INFO L350 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 45 treesize of output 34 [2023-01-27 23:02:26,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-01-27 23:02:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794013105] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:26,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-01-27 23:02:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829142375] [2023-01-27 23:02:26,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:02:26,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:26,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:02:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=140, Unknown=2, NotChecked=0, Total=182 [2023-01-27 23:02:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-27 23:02:26,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 185 flow. Second operand has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:26,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-27 23:02:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:26,641 INFO L130 PetriNetUnfolder]: 148/276 cut-off events. [2023-01-27 23:02:26,642 INFO L131 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2023-01-27 23:02:26,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 276 events. 148/276 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1026 event pairs, 21 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 992. Up to 173 conditions per place. [2023-01-27 23:02:26,643 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 35 selfloop transitions, 9 changer transitions 9/53 dead transitions. [2023-01-27 23:02:26,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 378 flow [2023-01-27 23:02:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:02:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:02:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 421 transitions. [2023-01-27 23:02:26,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990521327014218 [2023-01-27 23:02:26,644 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 421 transitions. [2023-01-27 23:02:26,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 421 transitions. [2023-01-27 23:02:26,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:26,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 421 transitions. [2023-01-27 23:02:26,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.2) internal successors, (421), 5 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,646 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 185 flow. Second operand 5 states and 421 transitions. [2023-01-27 23:02:26,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 378 flow [2023-01-27 23:02:26,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 362 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-27 23:02:26,649 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 204 flow [2023-01-27 23:02:26,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-01-27 23:02:26,650 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 18 predicate places. [2023-01-27 23:02:26,650 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 204 flow [2023-01-27 23:02:26,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.35714285714286) internal successors, (1097), 14 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:26,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:26,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:26,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:26,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:26,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1479539105, now seen corresponding path program 3 times [2023-01-27 23:02:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323276702] [2023-01-27 23:02:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:26,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323276702] [2023-01-27 23:02:26,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323276702] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:26,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389247329] [2023-01-27 23:02:26,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:02:26,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:26,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:26,905 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) [2023-01-27 23:02:26,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 23:02:26,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 23:02:26,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 23:02:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:26,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389247329] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:26,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:26,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-01-27 23:02:26,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966745562] [2023-01-27 23:02:26,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:26,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 23:02:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:26,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 23:02:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 23:02:26,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:02:26,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:26,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:26,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:02:26,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:27,070 INFO L130 PetriNetUnfolder]: 248/479 cut-off events. [2023-01-27 23:02:27,071 INFO L131 PetriNetUnfolder]: For 941/941 co-relation queries the response was YES. [2023-01-27 23:02:27,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 479 events. 248/479 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2155 event pairs, 80 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1742. Up to 306 conditions per place. [2023-01-27 23:02:27,072 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 40 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2023-01-27 23:02:27,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 446 flow [2023-01-27 23:02:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 23:02:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 23:02:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-01-27 23:02:27,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49881516587677727 [2023-01-27 23:02:27,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-01-27 23:02:27,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-01-27 23:02:27,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:27,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-01-27 23:02:27,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,076 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,076 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 204 flow. Second operand 4 states and 421 transitions. [2023-01-27 23:02:27,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 446 flow [2023-01-27 23:02:27,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 417 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-27 23:02:27,078 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 287 flow [2023-01-27 23:02:27,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-01-27 23:02:27,079 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 20 predicate places. [2023-01-27 23:02:27,079 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 287 flow [2023-01-27 23:02:27,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:27,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:27,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:27,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:27,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1493740304, now seen corresponding path program 4 times [2023-01-27 23:02:27,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:27,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647442431] [2023-01-27 23:02:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647442431] [2023-01-27 23:02:27,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647442431] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:27,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760341389] [2023-01-27 23:02:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:02:27,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:27,384 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) [2023-01-27 23:02:27,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 23:02:27,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:02:27,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 23:02:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:27,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760341389] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:27,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-01-27 23:02:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110017941] [2023-01-27 23:02:27,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:27,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 23:02:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 23:02:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-01-27 23:02:27,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:02:27,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:27,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:02:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:27,742 INFO L130 PetriNetUnfolder]: 288/586 cut-off events. [2023-01-27 23:02:27,743 INFO L131 PetriNetUnfolder]: For 1418/1418 co-relation queries the response was YES. [2023-01-27 23:02:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 586 events. 288/586 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2913 event pairs, 169 based on Foata normal form. 23/609 useless extension candidates. Maximal degree in co-relation 1829. Up to 455 conditions per place. [2023-01-27 23:02:27,747 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-01-27 23:02:27,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 579 flow [2023-01-27 23:02:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 23:02:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 23:02:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2023-01-27 23:02:27,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143534190927556 [2023-01-27 23:02:27,749 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2023-01-27 23:02:27,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2023-01-27 23:02:27,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:27,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2023-01-27 23:02:27,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,752 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,752 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 287 flow. Second operand 7 states and 612 transitions. [2023-01-27 23:02:27,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 579 flow [2023-01-27 23:02:27,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 67 transitions, 569 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-01-27 23:02:27,755 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 311 flow [2023-01-27 23:02:27,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-01-27 23:02:27,755 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 30 predicate places. [2023-01-27 23:02:27,755 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 311 flow [2023-01-27 23:02:27,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 83.64285714285714) internal successors, (1171), 14 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:27,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:27,757 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:27,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:27,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:27,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:27,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 927014978, now seen corresponding path program 5 times [2023-01-27 23:02:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60560392] [2023-01-27 23:02:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60560392] [2023-01-27 23:02:28,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60560392] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689406629] [2023-01-27 23:02:28,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:02:28,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:28,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:28,200 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) [2023-01-27 23:02:28,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 23:02:28,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:02:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-27 23:02:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:28,397 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:02:28,397 INFO L350 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 21 treesize of output 10 [2023-01-27 23:02:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:02:28,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:28,461 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:02:28,462 INFO L350 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 28 treesize of output 11 [2023-01-27 23:02:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689406629] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:28,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:28,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2023-01-27 23:02:28,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155962673] [2023-01-27 23:02:28,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:28,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 23:02:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 23:02:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-01-27 23:02:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-27 23:02:28,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 311 flow. Second operand has 17 states, 17 states have (on average 77.70588235294117) internal successors, (1321), 17 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:28,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:28,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-27 23:02:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:28,969 INFO L130 PetriNetUnfolder]: 350/661 cut-off events. [2023-01-27 23:02:28,969 INFO L131 PetriNetUnfolder]: For 1370/1370 co-relation queries the response was YES. [2023-01-27 23:02:28,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2649 conditions, 661 events. 350/661 cut-off events. For 1370/1370 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3207 event pairs, 30 based on Foata normal form. 5/666 useless extension candidates. Maximal degree in co-relation 2614. Up to 422 conditions per place. [2023-01-27 23:02:28,973 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 69 selfloop transitions, 29 changer transitions 51/149 dead transitions. [2023-01-27 23:02:28,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 1101 flow [2023-01-27 23:02:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:02:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:02:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1495 transitions. [2023-01-27 23:02:28,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936282253817799 [2023-01-27 23:02:28,976 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1495 transitions. [2023-01-27 23:02:28,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1495 transitions. [2023-01-27 23:02:28,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:28,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1495 transitions. [2023-01-27 23:02:28,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 83.05555555555556) internal successors, (1495), 18 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:28,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:28,984 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:28,984 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 311 flow. Second operand 18 states and 1495 transitions. [2023-01-27 23:02:28,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 1101 flow [2023-01-27 23:02:28,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 149 transitions, 1071 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-01-27 23:02:28,989 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 486 flow [2023-01-27 23:02:28,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-01-27 23:02:28,991 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 45 predicate places. [2023-01-27 23:02:28,991 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 486 flow [2023-01-27 23:02:28,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.70588235294117) internal successors, (1321), 17 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:28,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:28,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:28,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:29,197 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:29,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1904152626, now seen corresponding path program 6 times [2023-01-27 23:02:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:29,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293253260] [2023-01-27 23:02:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:29,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:29,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293253260] [2023-01-27 23:02:29,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293253260] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:29,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556724573] [2023-01-27 23:02:29,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:02:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:29,485 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) [2023-01-27 23:02:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 23:02:29,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 23:02:29,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 23:02:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:02:29,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 23:02:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:29,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:29,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:29,761 INFO L350 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 47 treesize of output 35 [2023-01-27 23:02:29,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 23:02:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:29,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556724573] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:29,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:29,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-27 23:02:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58776631] [2023-01-27 23:02:29,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:29,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 23:02:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 23:02:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=359, Unknown=2, NotChecked=0, Total=420 [2023-01-27 23:02:29,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-27 23:02:29,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 486 flow. Second operand has 21 states, 21 states have (on average 78.14285714285714) internal successors, (1641), 21 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:29,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:29,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-27 23:02:29,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:30,285 INFO L130 PetriNetUnfolder]: 366/690 cut-off events. [2023-01-27 23:02:30,285 INFO L131 PetriNetUnfolder]: For 1941/1941 co-relation queries the response was YES. [2023-01-27 23:02:30,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2932 conditions, 690 events. 366/690 cut-off events. For 1941/1941 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3360 event pairs, 32 based on Foata normal form. 1/691 useless extension candidates. Maximal degree in co-relation 2894. Up to 440 conditions per place. [2023-01-27 23:02:30,288 INFO L137 encePairwiseOnDemand]: 207/211 looper letters, 51 selfloop transitions, 28 changer transitions 30/109 dead transitions. [2023-01-27 23:02:30,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 946 flow [2023-01-27 23:02:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 23:02:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 23:02:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 926 transitions. [2023-01-27 23:02:30,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3989659629470056 [2023-01-27 23:02:30,290 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 926 transitions. [2023-01-27 23:02:30,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 926 transitions. [2023-01-27 23:02:30,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:30,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 926 transitions. [2023-01-27 23:02:30,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 84.18181818181819) internal successors, (926), 11 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,295 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 211.0) internal successors, (2532), 12 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,295 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 486 flow. Second operand 11 states and 926 transitions. [2023-01-27 23:02:30,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 946 flow [2023-01-27 23:02:30,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 109 transitions, 843 flow, removed 31 selfloop flow, removed 7 redundant places. [2023-01-27 23:02:30,300 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 461 flow [2023-01-27 23:02:30,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=461, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-01-27 23:02:30,301 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 49 predicate places. [2023-01-27 23:02:30,301 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 461 flow [2023-01-27 23:02:30,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 78.14285714285714) internal successors, (1641), 21 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:30,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:30,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:30,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:30,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:30,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1205721493, now seen corresponding path program 7 times [2023-01-27 23:02:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:30,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158803532] [2023-01-27 23:02:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:30,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158803532] [2023-01-27 23:02:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158803532] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118371157] [2023-01-27 23:02:30,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:02:30,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:30,564 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) [2023-01-27 23:02:30,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 23:02:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 23:02:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:30,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118371157] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:30,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-01-27 23:02:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119369047] [2023-01-27 23:02:30,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:30,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:02:30,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:30,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:02:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:02:30,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:02:30,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:30,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:02:30,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:30,793 INFO L130 PetriNetUnfolder]: 740/1387 cut-off events. [2023-01-27 23:02:30,793 INFO L131 PetriNetUnfolder]: For 4310/4310 co-relation queries the response was YES. [2023-01-27 23:02:30,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5540 conditions, 1387 events. 740/1387 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7836 event pairs, 152 based on Foata normal form. 18/1405 useless extension candidates. Maximal degree in co-relation 5504. Up to 886 conditions per place. [2023-01-27 23:02:30,798 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 58 selfloop transitions, 39 changer transitions 0/97 dead transitions. [2023-01-27 23:02:30,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 97 transitions, 1074 flow [2023-01-27 23:02:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 23:02:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 23:02:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 528 transitions. [2023-01-27 23:02:30,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.500473933649289 [2023-01-27 23:02:30,800 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 528 transitions. [2023-01-27 23:02:30,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 528 transitions. [2023-01-27 23:02:30,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:30,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 528 transitions. [2023-01-27 23:02:30,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 211.0) internal successors, (1266), 6 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,802 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 461 flow. Second operand 5 states and 528 transitions. [2023-01-27 23:02:30,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 97 transitions, 1074 flow [2023-01-27 23:02:30,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 931 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-27 23:02:30,809 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 731 flow [2023-01-27 23:02:30,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=731, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2023-01-27 23:02:30,809 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 43 predicate places. [2023-01-27 23:02:30,809 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 731 flow [2023-01-27 23:02:30,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 100.33333333333333) internal successors, (602), 6 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:30,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:30,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:30,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:31,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:31,014 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:31,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1050742924, now seen corresponding path program 8 times [2023-01-27 23:02:31,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:31,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176615290] [2023-01-27 23:02:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:02:31,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:31,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176615290] [2023-01-27 23:02:31,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176615290] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:31,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372668477] [2023-01-27 23:02:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:02:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:31,126 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) [2023-01-27 23:02:31,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 23:02:31,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:02:31,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:02:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:02:31,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 23:02:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372668477] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:31,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:31,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-27 23:02:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389189855] [2023-01-27 23:02:31,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 23:02:31,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 23:02:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-27 23:02:31,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:02:31,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:31,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:31,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:02:31,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:31,717 INFO L130 PetriNetUnfolder]: 1253/2411 cut-off events. [2023-01-27 23:02:31,718 INFO L131 PetriNetUnfolder]: For 5911/5911 co-relation queries the response was YES. [2023-01-27 23:02:31,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 2411 events. 1253/2411 cut-off events. For 5911/5911 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15956 event pairs, 660 based on Foata normal form. 72/2483 useless extension candidates. Maximal degree in co-relation 8879. Up to 1555 conditions per place. [2023-01-27 23:02:31,727 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 69 selfloop transitions, 4 changer transitions 65/138 dead transitions. [2023-01-27 23:02:31,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 138 transitions, 1591 flow [2023-01-27 23:02:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:02:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:02:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 694 transitions. [2023-01-27 23:02:31,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41113744075829384 [2023-01-27 23:02:31,729 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 694 transitions. [2023-01-27 23:02:31,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 694 transitions. [2023-01-27 23:02:31,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:31,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 694 transitions. [2023-01-27 23:02:31,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.75) internal successors, (694), 8 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:31,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:31,732 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:31,732 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 731 flow. Second operand 8 states and 694 transitions. [2023-01-27 23:02:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 138 transitions, 1591 flow [2023-01-27 23:02:31,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 138 transitions, 1496 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-01-27 23:02:31,751 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 771 flow [2023-01-27 23:02:31,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=771, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-01-27 23:02:31,752 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-01-27 23:02:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 771 flow [2023-01-27 23:02:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 83.15) internal successors, (1663), 20 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:31,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:31,753 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:31,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:31,960 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,SelfDestructingSolverStorable10 [2023-01-27 23:02:31,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:31,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1444760854, now seen corresponding path program 9 times [2023-01-27 23:02:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57397139] [2023-01-27 23:02:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:32,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57397139] [2023-01-27 23:02:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57397139] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341861390] [2023-01-27 23:02:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:02:32,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:32,291 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) [2023-01-27 23:02:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 23:02:32,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:02:32,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:32,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 23:02:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:32,868 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:32,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:32,870 INFO L350 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 17 treesize of output 10 [2023-01-27 23:02:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:32,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:32,964 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:02:32,965 INFO L350 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 28 treesize of output 11 [2023-01-27 23:02:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:33,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341861390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:33,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:33,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-01-27 23:02:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098704262] [2023-01-27 23:02:33,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-27 23:02:33,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-27 23:02:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-01-27 23:02:33,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-27 23:02:33,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 771 flow. Second operand has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:33,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:33,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-27 23:02:33,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:36,371 INFO L130 PetriNetUnfolder]: 2715/5029 cut-off events. [2023-01-27 23:02:36,372 INFO L131 PetriNetUnfolder]: For 13157/13157 co-relation queries the response was YES. [2023-01-27 23:02:36,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20300 conditions, 5029 events. 2715/5029 cut-off events. For 13157/13157 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 36421 event pairs, 120 based on Foata normal form. 34/5063 useless extension candidates. Maximal degree in co-relation 20255. Up to 3187 conditions per place. [2023-01-27 23:02:36,391 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 313 selfloop transitions, 234 changer transitions 292/839 dead transitions. [2023-01-27 23:02:36,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 839 transitions, 6745 flow [2023-01-27 23:02:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-01-27 23:02:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-01-27 23:02:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 7093 transitions. [2023-01-27 23:02:36,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36146358864597666 [2023-01-27 23:02:36,402 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 7093 transitions. [2023-01-27 23:02:36,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 7093 transitions. [2023-01-27 23:02:36,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:36,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 7093 transitions. [2023-01-27 23:02:36,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 76.26881720430107) internal successors, (7093), 93 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:36,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 211.0) internal successors, (19834), 94 states have internal predecessors, (19834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:36,431 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 211.0) internal successors, (19834), 94 states have internal predecessors, (19834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:36,431 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 771 flow. Second operand 93 states and 7093 transitions. [2023-01-27 23:02:36,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 839 transitions, 6745 flow [2023-01-27 23:02:36,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 839 transitions, 6363 flow, removed 188 selfloop flow, removed 6 redundant places. [2023-01-27 23:02:36,477 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 3302 flow [2023-01-27 23:02:36,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3302, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2023-01-27 23:02:36,478 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 175 predicate places. [2023-01-27 23:02:36,478 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 3302 flow [2023-01-27 23:02:36,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 69.89655172413794) internal successors, (2027), 29 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:36,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:36,483 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:36,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:36,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:36,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:36,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1952496242, now seen corresponding path program 10 times [2023-01-27 23:02:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:36,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118427805] [2023-01-27 23:02:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:37,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118427805] [2023-01-27 23:02:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118427805] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292566506] [2023-01-27 23:02:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:02:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:37,225 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) [2023-01-27 23:02:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 23:02:37,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:02:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 23:02:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:02:37,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 23:02:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:37,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:37,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:37,684 INFO L350 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 47 treesize of output 35 [2023-01-27 23:02:37,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 23:02:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:37,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292566506] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:37,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:37,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-01-27 23:02:37,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732214879] [2023-01-27 23:02:37,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:37,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-27 23:02:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-27 23:02:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=786, Unknown=3, NotChecked=0, Total=870 [2023-01-27 23:02:37,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-27 23:02:37,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 255 transitions, 3302 flow. Second operand has 30 states, 30 states have (on average 72.76666666666667) internal successors, (2183), 30 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:37,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:37,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-27 23:02:37,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:39,103 INFO L130 PetriNetUnfolder]: 3205/5922 cut-off events. [2023-01-27 23:02:39,103 INFO L131 PetriNetUnfolder]: For 127260/127260 co-relation queries the response was YES. [2023-01-27 23:02:39,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33700 conditions, 5922 events. 3205/5922 cut-off events. For 127260/127260 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 43220 event pairs, 386 based on Foata normal form. 9/5931 useless extension candidates. Maximal degree in co-relation 32835. Up to 3745 conditions per place. [2023-01-27 23:02:39,137 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 136 selfloop transitions, 213 changer transitions 44/393 dead transitions. [2023-01-27 23:02:39,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 393 transitions, 5395 flow [2023-01-27 23:02:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 23:02:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 23:02:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1405 transitions. [2023-01-27 23:02:39,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699315429173249 [2023-01-27 23:02:39,139 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1405 transitions. [2023-01-27 23:02:39,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1405 transitions. [2023-01-27 23:02:39,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:39,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1405 transitions. [2023-01-27 23:02:39,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.05555555555556) internal successors, (1405), 18 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:39,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:39,210 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:39,210 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 3302 flow. Second operand 18 states and 1405 transitions. [2023-01-27 23:02:39,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 393 transitions, 5395 flow [2023-01-27 23:02:40,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 393 transitions, 4736 flow, removed 269 selfloop flow, removed 7 redundant places. [2023-01-27 23:02:40,026 INFO L231 Difference]: Finished difference. Result has 207 places, 286 transitions, 3714 flow [2023-01-27 23:02:40,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3714, PETRI_PLACES=207, PETRI_TRANSITIONS=286} [2023-01-27 23:02:40,027 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 188 predicate places. [2023-01-27 23:02:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 286 transitions, 3714 flow [2023-01-27 23:02:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 72.76666666666667) internal successors, (2183), 30 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:40,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:40,027 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:40,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-27 23:02:40,228 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,SelfDestructingSolverStorable12 [2023-01-27 23:02:40,228 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:40,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 397356547, now seen corresponding path program 11 times [2023-01-27 23:02:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335184089] [2023-01-27 23:02:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335184089] [2023-01-27 23:02:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335184089] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931609995] [2023-01-27 23:02:40,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:02:40,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:40,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:40,293 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) [2023-01-27 23:02:40,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 23:02:40,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 23:02:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 23:02:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931609995] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:40,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:40,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-01-27 23:02:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380263073] [2023-01-27 23:02:40,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:40,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 23:02:40,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 23:02:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 23:02:40,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:02:40,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 286 transitions, 3714 flow. Second operand has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:40,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:40,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:02:40,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:41,869 INFO L130 PetriNetUnfolder]: 6229/11496 cut-off events. [2023-01-27 23:02:41,870 INFO L131 PetriNetUnfolder]: For 226509/226509 co-relation queries the response was YES. [2023-01-27 23:02:41,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69993 conditions, 11496 events. 6229/11496 cut-off events. For 226509/226509 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 93311 event pairs, 1300 based on Foata normal form. 72/11568 useless extension candidates. Maximal degree in co-relation 69912. Up to 7255 conditions per place. [2023-01-27 23:02:42,006 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 214 selfloop transitions, 323 changer transitions 0/537 dead transitions. [2023-01-27 23:02:42,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 537 transitions, 8118 flow [2023-01-27 23:02:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 23:02:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 23:02:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 635 transitions. [2023-01-27 23:02:42,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015797788309637 [2023-01-27 23:02:42,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 635 transitions. [2023-01-27 23:02:42,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 635 transitions. [2023-01-27 23:02:42,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:42,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 635 transitions. [2023-01-27 23:02:42,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:42,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:42,012 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 211.0) internal successors, (1477), 7 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:42,012 INFO L175 Difference]: Start difference. First operand has 207 places, 286 transitions, 3714 flow. Second operand 6 states and 635 transitions. [2023-01-27 23:02:42,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 537 transitions, 8118 flow [2023-01-27 23:02:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 537 transitions, 7638 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-01-27 23:02:42,445 INFO L231 Difference]: Finished difference. Result has 206 places, 503 transitions, 7748 flow [2023-01-27 23:02:42,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=3362, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7748, PETRI_PLACES=206, PETRI_TRANSITIONS=503} [2023-01-27 23:02:42,445 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 187 predicate places. [2023-01-27 23:02:42,445 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 503 transitions, 7748 flow [2023-01-27 23:02:42,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.33333333333333) internal successors, (596), 6 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:42,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:42,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:42,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 23:02:42,649 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,SelfDestructingSolverStorable13 [2023-01-27 23:02:42,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:42,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash 918217482, now seen corresponding path program 12 times [2023-01-27 23:02:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741496394] [2023-01-27 23:02:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 23:02:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741496394] [2023-01-27 23:02:42,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741496394] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017464164] [2023-01-27 23:02:42,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:02:42,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:42,801 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) [2023-01-27 23:02:42,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 23:02:43,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 23:02:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:43,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 23:02:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:43,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:02:43,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017464164] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:43,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:43,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 23:02:43,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048758614] [2023-01-27 23:02:43,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:43,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 23:02:43,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 23:02:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-01-27 23:02:43,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:02:43,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 503 transitions, 7748 flow. Second operand has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:43,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:43,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:02:43,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:44,858 INFO L130 PetriNetUnfolder]: 4039/7721 cut-off events. [2023-01-27 23:02:44,859 INFO L131 PetriNetUnfolder]: For 168706/168706 co-relation queries the response was YES. [2023-01-27 23:02:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48867 conditions, 7721 events. 4039/7721 cut-off events. For 168706/168706 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62815 event pairs, 1847 based on Foata normal form. 324/8045 useless extension candidates. Maximal degree in co-relation 48783. Up to 4951 conditions per place. [2023-01-27 23:02:44,893 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 154 selfloop transitions, 5 changer transitions 210/369 dead transitions. [2023-01-27 23:02:44,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 369 transitions, 6546 flow [2023-01-27 23:02:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:02:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:02:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 865 transitions. [2023-01-27 23:02:44,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099526066350711 [2023-01-27 23:02:44,895 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 865 transitions. [2023-01-27 23:02:44,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 865 transitions. [2023-01-27 23:02:44,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:44,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 865 transitions. [2023-01-27 23:02:44,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.5) internal successors, (865), 10 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:44,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:44,898 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:44,898 INFO L175 Difference]: Start difference. First operand has 206 places, 503 transitions, 7748 flow. Second operand 10 states and 865 transitions. [2023-01-27 23:02:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 369 transitions, 6546 flow [2023-01-27 23:02:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 369 transitions, 5991 flow, removed 178 selfloop flow, removed 13 redundant places. [2023-01-27 23:02:45,780 INFO L231 Difference]: Finished difference. Result has 194 places, 159 transitions, 2447 flow [2023-01-27 23:02:45,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2447, PETRI_PLACES=194, PETRI_TRANSITIONS=159} [2023-01-27 23:02:45,781 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 175 predicate places. [2023-01-27 23:02:45,781 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 159 transitions, 2447 flow [2023-01-27 23:02:45,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:45,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:45,781 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:45,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:45,986 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,SelfDestructingSolverStorable14 [2023-01-27 23:02:45,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:45,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash -657168656, now seen corresponding path program 13 times [2023-01-27 23:02:45,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222406818] [2023-01-27 23:02:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222406818] [2023-01-27 23:02:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222406818] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395331820] [2023-01-27 23:02:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:02:46,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:46,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:46,447 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) [2023-01-27 23:02:46,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 23:02:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-27 23:02:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:02:46,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:46,827 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:02:46,828 INFO L350 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 28 treesize of output 11 [2023-01-27 23:02:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:02:46,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395331820] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:46,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:46,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 31 [2023-01-27 23:02:46,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927289712] [2023-01-27 23:02:46,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:46,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-27 23:02:46,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-27 23:02:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2023-01-27 23:02:46,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-27 23:02:46,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 159 transitions, 2447 flow. Second operand has 33 states, 33 states have (on average 76.81818181818181) internal successors, (2535), 33 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:46,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:46,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-27 23:02:46,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:49,129 INFO L130 PetriNetUnfolder]: 2480/4557 cut-off events. [2023-01-27 23:02:49,130 INFO L131 PetriNetUnfolder]: For 91246/91246 co-relation queries the response was YES. [2023-01-27 23:02:49,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28854 conditions, 4557 events. 2480/4557 cut-off events. For 91246/91246 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31692 event pairs, 80 based on Foata normal form. 9/4566 useless extension candidates. Maximal degree in co-relation 28779. Up to 2874 conditions per place. [2023-01-27 23:02:49,151 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 175 selfloop transitions, 188 changer transitions 163/526 dead transitions. [2023-01-27 23:02:49,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 526 transitions, 6697 flow [2023-01-27 23:02:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-27 23:02:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-27 23:02:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4394 transitions. [2023-01-27 23:02:49,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39291782169364214 [2023-01-27 23:02:49,155 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4394 transitions. [2023-01-27 23:02:49,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4394 transitions. [2023-01-27 23:02:49,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:49,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4394 transitions. [2023-01-27 23:02:49,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.90566037735849) internal successors, (4394), 53 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:49,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:49,168 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:49,168 INFO L175 Difference]: Start difference. First operand has 194 places, 159 transitions, 2447 flow. Second operand 53 states and 4394 transitions. [2023-01-27 23:02:49,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 526 transitions, 6697 flow [2023-01-27 23:02:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 526 transitions, 5016 flow, removed 755 selfloop flow, removed 33 redundant places. [2023-01-27 23:02:49,567 INFO L231 Difference]: Finished difference. Result has 162 places, 207 transitions, 3320 flow [2023-01-27 23:02:49,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3320, PETRI_PLACES=162, PETRI_TRANSITIONS=207} [2023-01-27 23:02:49,568 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 143 predicate places. [2023-01-27 23:02:49,568 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 207 transitions, 3320 flow [2023-01-27 23:02:49,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.81818181818181) internal successors, (2535), 33 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:49,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:49,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:49,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-27 23:02:49,773 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,SelfDestructingSolverStorable15 [2023-01-27 23:02:49,773 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:49,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 779977742, now seen corresponding path program 14 times [2023-01-27 23:02:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:49,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682230216] [2023-01-27 23:02:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:02:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682230216] [2023-01-27 23:02:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682230216] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297250869] [2023-01-27 23:02:50,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:02:50,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:50,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:50,301 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) [2023-01-27 23:02:50,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 23:02:50,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:02:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-27 23:02:50,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:02:50,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 23:02:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:02:50,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:50,781 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_539) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-01-27 23:02:50,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:50,794 INFO L350 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 47 treesize of output 35 [2023-01-27 23:02:50,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 23:02:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 4 not checked. [2023-01-27 23:02:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297250869] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:50,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-01-27 23:02:50,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228591299] [2023-01-27 23:02:50,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:50,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-27 23:02:50,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:50,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-27 23:02:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1161, Unknown=1, NotChecked=68, Total=1332 [2023-01-27 23:02:50,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-27 23:02:50,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 207 transitions, 3320 flow. Second operand has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:50,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:50,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-27 23:02:50,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:02:52,546 INFO L130 PetriNetUnfolder]: 2496/4586 cut-off events. [2023-01-27 23:02:52,546 INFO L131 PetriNetUnfolder]: For 23232/23232 co-relation queries the response was YES. [2023-01-27 23:02:52,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21747 conditions, 4586 events. 2496/4586 cut-off events. For 23232/23232 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31832 event pairs, 92 based on Foata normal form. 1/4587 useless extension candidates. Maximal degree in co-relation 21691. Up to 2892 conditions per place. [2023-01-27 23:02:52,562 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 77 selfloop transitions, 188 changer transitions 58/323 dead transitions. [2023-01-27 23:02:52,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 4432 flow [2023-01-27 23:02:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 23:02:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 23:02:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1795 transitions. [2023-01-27 23:02:52,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698743045538842 [2023-01-27 23:02:52,564 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1795 transitions. [2023-01-27 23:02:52,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1795 transitions. [2023-01-27 23:02:52,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:02:52,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1795 transitions. [2023-01-27 23:02:52,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.04347826086956) internal successors, (1795), 23 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:52,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:52,569 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 211.0) internal successors, (5064), 24 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:52,569 INFO L175 Difference]: Start difference. First operand has 162 places, 207 transitions, 3320 flow. Second operand 23 states and 1795 transitions. [2023-01-27 23:02:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 4432 flow [2023-01-27 23:02:52,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 323 transitions, 4005 flow, removed 42 selfloop flow, removed 19 redundant places. [2023-01-27 23:02:52,650 INFO L231 Difference]: Finished difference. Result has 166 places, 208 transitions, 3296 flow [2023-01-27 23:02:52,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3296, PETRI_PLACES=166, PETRI_TRANSITIONS=208} [2023-01-27 23:02:52,651 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 147 predicate places. [2023-01-27 23:02:52,651 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 208 transitions, 3296 flow [2023-01-27 23:02:52,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 72.62162162162163) internal successors, (2687), 37 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:52,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:02:52,651 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:02:52,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 23:02:52,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:52,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:02:52,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:02:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -25952981, now seen corresponding path program 15 times [2023-01-27 23:02:52,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:02:52,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407364379] [2023-01-27 23:02:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:02:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:02:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:02:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:02:52,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:02:52,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407364379] [2023-01-27 23:02:52,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407364379] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:02:52,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197857893] [2023-01-27 23:02:52,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:02:52,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:02:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:02:52,941 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) [2023-01-27 23:02:52,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 23:02:53,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 23:02:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:02:53,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-27 23:02:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:02:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-27 23:02:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:02:53,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:02:53,508 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-27 23:02:53,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 16 [2023-01-27 23:02:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:02:53,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:02:53,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-01-27 23:02:53,937 INFO L321 Elim1Store]: treesize reduction 15, result has 54.5 percent of original size [2023-01-27 23:02:53,938 INFO L350 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 712 treesize of output 639 [2023-01-27 23:02:53,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:53,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:53,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-27 23:02:53,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 220 [2023-01-27 23:02:53,981 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-01-27 23:02:53,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 233 treesize of output 159 [2023-01-27 23:02:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-27 23:02:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197857893] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:02:54,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:02:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 31 [2023-01-27 23:02:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489706009] [2023-01-27 23:02:54,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:02:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 23:02:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:02:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 23:02:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=804, Unknown=4, NotChecked=0, Total=992 [2023-01-27 23:02:54,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-27 23:02:54,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 208 transitions, 3296 flow. Second operand has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:02:54,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:02:54,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-27 23:02:54,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:00,143 INFO L130 PetriNetUnfolder]: 9105/16697 cut-off events. [2023-01-27 23:03:00,143 INFO L131 PetriNetUnfolder]: For 103144/103144 co-relation queries the response was YES. [2023-01-27 23:03:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80135 conditions, 16697 events. 9105/16697 cut-off events. For 103144/103144 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 142067 event pairs, 744 based on Foata normal form. 53/16750 useless extension candidates. Maximal degree in co-relation 73506. Up to 10507 conditions per place. [2023-01-27 23:03:00,211 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 133 selfloop transitions, 271 changer transitions 711/1115 dead transitions. [2023-01-27 23:03:00,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1115 transitions, 15971 flow [2023-01-27 23:03:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-01-27 23:03:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-01-27 23:03:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4969 transitions. [2023-01-27 23:03:00,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32708004212743547 [2023-01-27 23:03:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4969 transitions. [2023-01-27 23:03:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4969 transitions. [2023-01-27 23:03:00,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:00,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4969 transitions. [2023-01-27 23:03:00,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 69.01388888888889) internal successors, (4969), 72 states have internal predecessors, (4969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:00,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 211.0) internal successors, (15403), 73 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:00,230 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 211.0) internal successors, (15403), 73 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:00,230 INFO L175 Difference]: Start difference. First operand has 166 places, 208 transitions, 3296 flow. Second operand 72 states and 4969 transitions. [2023-01-27 23:03:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 1115 transitions, 15971 flow [2023-01-27 23:03:00,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1115 transitions, 14819 flow, removed 29 selfloop flow, removed 18 redundant places. [2023-01-27 23:03:00,793 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 6145 flow [2023-01-27 23:03:00,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=6145, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2023-01-27 23:03:00,793 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 224 predicate places. [2023-01-27 23:03:00,794 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 6145 flow [2023-01-27 23:03:00,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.03125) internal successors, (2017), 32 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:00,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:00,794 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:00,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-27 23:03:00,994 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,SelfDestructingSolverStorable17 [2023-01-27 23:03:00,995 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:00,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -58665988, now seen corresponding path program 16 times [2023-01-27 23:03:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198779864] [2023-01-27 23:03:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:01,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:01,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198779864] [2023-01-27 23:03:01,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198779864] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:01,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121440312] [2023-01-27 23:03:01,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:03:01,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:01,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:01,153 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) [2023-01-27 23:03:01,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 23:03:01,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:03:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:03:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 23:03:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:01,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121440312] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:01,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:01,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-27 23:03:01,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814609811] [2023-01-27 23:03:01,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:01,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-27 23:03:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-27 23:03:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2023-01-27 23:03:01,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:03:01,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 6145 flow. Second operand has 32 states, 32 states have (on average 82.625) internal successors, (2644), 32 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:01,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:01,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:03:01,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:03,327 INFO L130 PetriNetUnfolder]: 5113/9531 cut-off events. [2023-01-27 23:03:03,328 INFO L131 PetriNetUnfolder]: For 48431/48431 co-relation queries the response was YES. [2023-01-27 23:03:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46322 conditions, 9531 events. 5113/9531 cut-off events. For 48431/48431 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 77267 event pairs, 3154 based on Foata normal form. 121/9652 useless extension candidates. Maximal degree in co-relation 46043. Up to 8306 conditions per place. [2023-01-27 23:03:03,379 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 335 selfloop transitions, 6 changer transitions 147/488 dead transitions. [2023-01-27 23:03:03,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 488 transitions, 8076 flow [2023-01-27 23:03:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 23:03:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 23:03:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1839 transitions. [2023-01-27 23:03:03,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150304671631686 [2023-01-27 23:03:03,381 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1839 transitions. [2023-01-27 23:03:03,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1839 transitions. [2023-01-27 23:03:03,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:03,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1839 transitions. [2023-01-27 23:03:03,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 87.57142857142857) internal successors, (1839), 21 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:03,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 211.0) internal successors, (4642), 22 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:03,386 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 211.0) internal successors, (4642), 22 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:03,386 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 6145 flow. Second operand 21 states and 1839 transitions. [2023-01-27 23:03:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 488 transitions, 8076 flow [2023-01-27 23:03:03,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 488 transitions, 7542 flow, removed 249 selfloop flow, removed 25 redundant places. [2023-01-27 23:03:03,707 INFO L231 Difference]: Finished difference. Result has 201 places, 341 transitions, 5626 flow [2023-01-27 23:03:03,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5626, PETRI_PLACES=201, PETRI_TRANSITIONS=341} [2023-01-27 23:03:03,708 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 182 predicate places. [2023-01-27 23:03:03,708 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 341 transitions, 5626 flow [2023-01-27 23:03:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 82.625) internal successors, (2644), 32 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:03,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:03,708 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:03,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:03,913 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:03,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1406109756, now seen corresponding path program 17 times [2023-01-27 23:03:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:03,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171516199] [2023-01-27 23:03:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:03:04,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:04,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171516199] [2023-01-27 23:03:04,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171516199] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:04,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534869978] [2023-01-27 23:03:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:03:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:04,368 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) [2023-01-27 23:03:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 23:03:04,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 23:03:04,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:03:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-27 23:03:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:04,893 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:03:04,893 INFO L350 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 21 treesize of output 10 [2023-01-27 23:03:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:03:04,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:05,033 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:03:05,034 INFO L350 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 28 treesize of output 11 [2023-01-27 23:03:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:05,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534869978] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:05,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:05,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 11] total 41 [2023-01-27 23:03:05,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671767991] [2023-01-27 23:03:05,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:05,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-27 23:03:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:05,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-27 23:03:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-01-27 23:03:05,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-27 23:03:05,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 341 transitions, 5626 flow. Second operand has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:05,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:05,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-27 23:03:05,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:09,403 INFO L130 PetriNetUnfolder]: 5660/10339 cut-off events. [2023-01-27 23:03:09,403 INFO L131 PetriNetUnfolder]: For 57012/57012 co-relation queries the response was YES. [2023-01-27 23:03:09,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48416 conditions, 10339 events. 5660/10339 cut-off events. For 57012/57012 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 81041 event pairs, 210 based on Foata normal form. 11/10350 useless extension candidates. Maximal degree in co-relation 48342. Up to 6482 conditions per place. [2023-01-27 23:03:09,455 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 249 selfloop transitions, 409 changer transitions 240/898 dead transitions. [2023-01-27 23:03:09,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 898 transitions, 10667 flow [2023-01-27 23:03:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-01-27 23:03:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-01-27 23:03:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6305 transitions. [2023-01-27 23:03:09,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931778498378648 [2023-01-27 23:03:09,460 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6305 transitions. [2023-01-27 23:03:09,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6305 transitions. [2023-01-27 23:03:09,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:09,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6305 transitions. [2023-01-27 23:03:09,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 82.96052631578948) internal successors, (6305), 76 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:09,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:09,474 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 211.0) internal successors, (16247), 77 states have internal predecessors, (16247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:09,474 INFO L175 Difference]: Start difference. First operand has 201 places, 341 transitions, 5626 flow. Second operand 76 states and 6305 transitions. [2023-01-27 23:03:09,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 898 transitions, 10667 flow [2023-01-27 23:03:09,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 898 transitions, 10464 flow, removed 81 selfloop flow, removed 25 redundant places. [2023-01-27 23:03:09,828 INFO L231 Difference]: Finished difference. Result has 243 places, 430 transitions, 8180 flow [2023-01-27 23:03:09,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=5453, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8180, PETRI_PLACES=243, PETRI_TRANSITIONS=430} [2023-01-27 23:03:09,829 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 224 predicate places. [2023-01-27 23:03:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 430 transitions, 8180 flow [2023-01-27 23:03:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 76.65116279069767) internal successors, (3296), 43 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:09,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:09,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:09,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:10,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:10,030 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:10,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1419600050, now seen corresponding path program 18 times [2023-01-27 23:03:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:10,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835388325] [2023-01-27 23:03:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:10,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:03:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835388325] [2023-01-27 23:03:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835388325] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618394074] [2023-01-27 23:03:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:03:10,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:10,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:03:10,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 23:03:10,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 23:03:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:03:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-27 23:03:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:10,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 23:03:10,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:03:11,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:03:11,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-01-27 23:03:13,495 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-27 23:03:13,495 INFO L350 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 26 treesize of output 10 [2023-01-27 23:03:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 23 refuted. 1 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:03:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:14,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:03:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-01-27 23:03:14,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:03:14,573 INFO L350 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 106 treesize of output 97 [2023-01-27 23:03:14,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:03:14,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2023-01-27 23:03:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-01-27 23:03:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 23:03:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618394074] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:14,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 44 [2023-01-27 23:03:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873105766] [2023-01-27 23:03:14,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 23:03:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 23:03:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1801, Unknown=2, NotChecked=0, Total=2070 [2023-01-27 23:03:14,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-27 23:03:14,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 430 transitions, 8180 flow. Second operand has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:14,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:14,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-27 23:03:14,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:22,653 INFO L130 PetriNetUnfolder]: 8379/15599 cut-off events. [2023-01-27 23:03:22,654 INFO L131 PetriNetUnfolder]: For 102524/102524 co-relation queries the response was YES. [2023-01-27 23:03:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77970 conditions, 15599 events. 8379/15599 cut-off events. For 102524/102524 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 132880 event pairs, 366 based on Foata normal form. 283/15882 useless extension candidates. Maximal degree in co-relation 77268. Up to 9743 conditions per place. [2023-01-27 23:03:22,726 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 63 selfloop transitions, 410 changer transitions 451/924 dead transitions. [2023-01-27 23:03:22,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 924 transitions, 15555 flow [2023-01-27 23:03:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-27 23:03:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-27 23:03:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3014 transitions. [2023-01-27 23:03:22,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3246445497630332 [2023-01-27 23:03:22,729 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3014 transitions. [2023-01-27 23:03:22,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3014 transitions. [2023-01-27 23:03:22,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:22,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3014 transitions. [2023-01-27 23:03:22,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 68.5) internal successors, (3014), 44 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:22,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:22,736 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 211.0) internal successors, (9495), 45 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:22,736 INFO L175 Difference]: Start difference. First operand has 243 places, 430 transitions, 8180 flow. Second operand 44 states and 3014 transitions. [2023-01-27 23:03:22,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 924 transitions, 15555 flow [2023-01-27 23:03:23,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 924 transitions, 14003 flow, removed 80 selfloop flow, removed 30 redundant places. [2023-01-27 23:03:23,595 INFO L231 Difference]: Finished difference. Result has 260 places, 432 transitions, 8184 flow [2023-01-27 23:03:23,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8184, PETRI_PLACES=260, PETRI_TRANSITIONS=432} [2023-01-27 23:03:23,596 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 241 predicate places. [2023-01-27 23:03:23,596 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 432 transitions, 8184 flow [2023-01-27 23:03:23,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 62.5) internal successors, (2875), 46 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:23,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:23,597 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:23,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:23,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:23,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash -46687399, now seen corresponding path program 19 times [2023-01-27 23:03:23,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:23,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753438908] [2023-01-27 23:03:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:23,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753438908] [2023-01-27 23:03:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753438908] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101430512] [2023-01-27 23:03:23,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:03:23,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:23,913 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) [2023-01-27 23:03:23,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 23:03:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:24,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 23:03:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:24,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101430512] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:24,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:24,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2023-01-27 23:03:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927798683] [2023-01-27 23:03:24,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 23:03:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 23:03:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-01-27 23:03:24,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:03:24,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 432 transitions, 8184 flow. Second operand has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:24,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:24,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:03:24,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:26,698 INFO L130 PetriNetUnfolder]: 9992/18215 cut-off events. [2023-01-27 23:03:26,698 INFO L131 PetriNetUnfolder]: For 163958/163958 co-relation queries the response was YES. [2023-01-27 23:03:26,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95109 conditions, 18215 events. 9992/18215 cut-off events. For 163958/163958 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 155161 event pairs, 1234 based on Foata normal form. 18/18233 useless extension candidates. Maximal degree in co-relation 95014. Up to 11386 conditions per place. [2023-01-27 23:03:26,767 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 213 selfloop transitions, 542 changer transitions 0/755 dead transitions. [2023-01-27 23:03:26,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 755 transitions, 16297 flow [2023-01-27 23:03:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 23:03:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 23:03:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-01-27 23:03:26,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029620853080569 [2023-01-27 23:03:26,769 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-01-27 23:03:26,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-01-27 23:03:26,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:26,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-01-27 23:03:26,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:26,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:26,771 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 211.0) internal successors, (1899), 9 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:26,771 INFO L175 Difference]: Start difference. First operand has 260 places, 432 transitions, 8184 flow. Second operand 8 states and 849 transitions. [2023-01-27 23:03:26,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 755 transitions, 16297 flow [2023-01-27 23:03:27,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 755 transitions, 15479 flow, removed 63 selfloop flow, removed 14 redundant places. [2023-01-27 23:03:27,487 INFO L231 Difference]: Finished difference. Result has 230 places, 706 transitions, 14933 flow [2023-01-27 23:03:27,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14933, PETRI_PLACES=230, PETRI_TRANSITIONS=706} [2023-01-27 23:03:27,488 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 211 predicate places. [2023-01-27 23:03:27,488 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 706 transitions, 14933 flow [2023-01-27 23:03:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.55555555555556) internal successors, (896), 9 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:27,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:27,488 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:27,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:27,689 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash -426818820, now seen corresponding path program 20 times [2023-01-27 23:03:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182157924] [2023-01-27 23:03:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:28,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182157924] [2023-01-27 23:03:28,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182157924] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:28,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428467622] [2023-01-27 23:03:28,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:03:28,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:28,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:28,075 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) [2023-01-27 23:03:28,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 23:03:28,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:03:28,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:03:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-27 23:03:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:28,488 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:03:28,488 INFO L350 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 22 treesize of output 10 [2023-01-27 23:03:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:28,602 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:03:28,603 INFO L350 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 28 treesize of output 11 [2023-01-27 23:03:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-27 23:03:28,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428467622] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:28,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:28,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2023-01-27 23:03:28,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149356515] [2023-01-27 23:03:28,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:28,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-27 23:03:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-27 23:03:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2023-01-27 23:03:28,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 211 [2023-01-27 23:03:28,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 706 transitions, 14933 flow. Second operand has 39 states, 39 states have (on average 81.51282051282051) internal successors, (3179), 39 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:28,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:28,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 211 [2023-01-27 23:03:28,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:03:38,583 INFO L130 PetriNetUnfolder]: 13336/24270 cut-off events. [2023-01-27 23:03:38,583 INFO L131 PetriNetUnfolder]: For 209008/209008 co-relation queries the response was YES. [2023-01-27 23:03:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130619 conditions, 24270 events. 13336/24270 cut-off events. For 209008/209008 co-relation queries the response was YES. Maximal size of possible extension queue 1356. Compared 215171 event pairs, 580 based on Foata normal form. 12/24282 useless extension candidates. Maximal degree in co-relation 130550. Up to 15148 conditions per place. [2023-01-27 23:03:38,727 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 525 selfloop transitions, 967 changer transitions 653/2145 dead transitions. [2023-01-27 23:03:38,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 2145 transitions, 29551 flow [2023-01-27 23:03:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2023-01-27 23:03:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2023-01-27 23:03:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 15616 transitions. [2023-01-27 23:03:38,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41813264786997617 [2023-01-27 23:03:38,737 INFO L72 ComplementDD]: Start complementDD. Operand 177 states and 15616 transitions. [2023-01-27 23:03:38,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 177 states and 15616 transitions. [2023-01-27 23:03:38,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:03:38,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 177 states and 15616 transitions. [2023-01-27 23:03:38,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 178 states, 177 states have (on average 88.22598870056497) internal successors, (15616), 177 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:38,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:38,773 INFO L81 ComplementDD]: Finished complementDD. Result has 178 states, 178 states have (on average 211.0) internal successors, (37558), 178 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:38,774 INFO L175 Difference]: Start difference. First operand has 230 places, 706 transitions, 14933 flow. Second operand 177 states and 15616 transitions. [2023-01-27 23:03:38,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 2145 transitions, 29551 flow [2023-01-27 23:03:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 2145 transitions, 28023 flow, removed 764 selfloop flow, removed 1 redundant places. [2023-01-27 23:03:40,168 INFO L231 Difference]: Finished difference. Result has 418 places, 995 transitions, 22238 flow [2023-01-27 23:03:40,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=14053, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=22238, PETRI_PLACES=418, PETRI_TRANSITIONS=995} [2023-01-27 23:03:40,168 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 399 predicate places. [2023-01-27 23:03:40,168 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 995 transitions, 22238 flow [2023-01-27 23:03:40,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 81.51282051282051) internal successors, (3179), 39 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:40,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:03:40,169 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:03:40,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 23:03:40,369 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,SelfDestructingSolverStorable22 [2023-01-27 23:03:40,369 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:03:40,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:03:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -496420982, now seen corresponding path program 21 times [2023-01-27 23:03:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:03:40,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668640268] [2023-01-27 23:03:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:03:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:03:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:03:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-01-27 23:03:40,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:03:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668640268] [2023-01-27 23:03:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668640268] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:03:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997113710] [2023-01-27 23:03:40,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:03:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:03:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:03:40,784 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) [2023-01-27 23:03:40,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 23:03:41,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-27 23:03:41,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:03:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-27 23:03:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:03:41,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-27 23:03:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:03:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-27 23:03:43,300 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-27 23:03:43,300 INFO L350 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 26 treesize of output 10 [2023-01-27 23:03:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 32 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:43,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:03:43,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:03:43,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-01-27 23:03:43,948 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 23:03:43,949 INFO L350 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 152 treesize of output 138 [2023-01-27 23:03:43,956 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-01-27 23:03:43,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 103 [2023-01-27 23:03:43,965 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-01-27 23:03:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 67 [2023-01-27 23:03:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:03:44,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997113710] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:03:44,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:03:44,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-01-27 23:03:44,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464183869] [2023-01-27 23:03:44,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:03:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-27 23:03:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:03:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-27 23:03:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1759, Unknown=6, NotChecked=0, Total=2070 [2023-01-27 23:03:44,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 211 [2023-01-27 23:03:44,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 995 transitions, 22238 flow. Second operand has 46 states, 46 states have (on average 62.54347826086956) internal successors, (2877), 46 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:03:44,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:03:44,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 211 [2023-01-27 23:03:44,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:04:13,387 INFO L130 PetriNetUnfolder]: 45991/83740 cut-off events. [2023-01-27 23:04:13,388 INFO L131 PetriNetUnfolder]: For 794013/794013 co-relation queries the response was YES. [2023-01-27 23:04:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477281 conditions, 83740 events. 45991/83740 cut-off events. For 794013/794013 co-relation queries the response was YES. Maximal size of possible extension queue 4160. Compared 866690 event pairs, 6737 based on Foata normal form. 2/83742 useless extension candidates. Maximal degree in co-relation 473535. Up to 52295 conditions per place. [2023-01-27 23:04:14,091 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 516 selfloop transitions, 984 changer transitions 2490/3990 dead transitions. [2023-01-27 23:04:14,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 3990 transitions, 91251 flow [2023-01-27 23:04:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-01-27 23:04:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-01-27 23:04:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6257 transitions. [2023-01-27 23:04:14,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3258684443518567 [2023-01-27 23:04:14,096 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6257 transitions. [2023-01-27 23:04:14,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6257 transitions. [2023-01-27 23:04:14,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:04:14,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6257 transitions. [2023-01-27 23:04:14,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 68.75824175824175) internal successors, (6257), 91 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:14,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:14,119 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 211.0) internal successors, (19412), 92 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:14,119 INFO L175 Difference]: Start difference. First operand has 418 places, 995 transitions, 22238 flow. Second operand 91 states and 6257 transitions. [2023-01-27 23:04:14,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 3990 transitions, 91251 flow [2023-01-27 23:04:34,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 3990 transitions, 82710 flow, removed 889 selfloop flow, removed 31 redundant places. [2023-01-27 23:04:34,313 INFO L231 Difference]: Finished difference. Result has 508 places, 1399 transitions, 33181 flow [2023-01-27 23:04:34,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=19881, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=33181, PETRI_PLACES=508, PETRI_TRANSITIONS=1399} [2023-01-27 23:04:34,314 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 489 predicate places. [2023-01-27 23:04:34,314 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1399 transitions, 33181 flow [2023-01-27 23:04:34,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 62.54347826086956) internal successors, (2877), 46 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:34,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:04:34,315 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:04:34,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 23:04:34,515 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,SelfDestructingSolverStorable23 [2023-01-27 23:04:34,515 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:04:34,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:04:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 866703688, now seen corresponding path program 22 times [2023-01-27 23:04:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:04:34,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569974398] [2023-01-27 23:04:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:04:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:04:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:04:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 23:04:35,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:04:35,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569974398] [2023-01-27 23:04:35,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569974398] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:04:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084796064] [2023-01-27 23:04:35,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:04:35,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:04:35,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:04:35,122 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) [2023-01-27 23:04:35,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 23:04:35,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:04:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:04:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-27 23:04:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:04:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:04:35,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 23:04:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 23:04:35,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:04:35,761 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_932 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_932) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 20)))) is different from false [2023-01-27 23:04:35,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:04:35,769 INFO L350 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 47 treesize of output 35 [2023-01-27 23:04:35,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 23:04:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 6 not checked. [2023-01-27 23:04:35,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084796064] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:04:35,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:04:35,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-27 23:04:35,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681650730] [2023-01-27 23:04:35,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:04:35,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-27 23:04:35,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:04:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-27 23:04:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1771, Unknown=1, NotChecked=84, Total=1980 [2023-01-27 23:04:35,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 211 [2023-01-27 23:04:35,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1399 transitions, 33181 flow. Second operand has 45 states, 45 states have (on average 77.53333333333333) internal successors, (3489), 45 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:35,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:04:35,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 211 [2023-01-27 23:04:35,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:04:49,629 INFO L130 PetriNetUnfolder]: 21024/37697 cut-off events. [2023-01-27 23:04:49,629 INFO L131 PetriNetUnfolder]: For 484021/484021 co-relation queries the response was YES. [2023-01-27 23:04:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218316 conditions, 37697 events. 21024/37697 cut-off events. For 484021/484021 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 348683 event pairs, 871 based on Foata normal form. 1/37698 useless extension candidates. Maximal degree in co-relation 218182. Up to 23936 conditions per place. [2023-01-27 23:04:49,991 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 113 selfloop transitions, 1544 changer transitions 87/1744 dead transitions. [2023-01-27 23:04:49,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1744 transitions, 42674 flow [2023-01-27 23:04:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 23:04:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 23:04:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2360 transitions. [2023-01-27 23:04:49,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994583615436696 [2023-01-27 23:04:49,994 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2360 transitions. [2023-01-27 23:04:49,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2360 transitions. [2023-01-27 23:04:49,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:04:49,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2360 transitions. [2023-01-27 23:04:49,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 84.28571428571429) internal successors, (2360), 28 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:49,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 211.0) internal successors, (6119), 29 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:49,999 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 211.0) internal successors, (6119), 29 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:49,999 INFO L175 Difference]: Start difference. First operand has 508 places, 1399 transitions, 33181 flow. Second operand 28 states and 2360 transitions. [2023-01-27 23:04:49,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1744 transitions, 42674 flow [2023-01-27 23:04:55,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1744 transitions, 40476 flow, removed 1013 selfloop flow, removed 37 redundant places. [2023-01-27 23:04:55,364 INFO L231 Difference]: Finished difference. Result has 460 places, 1574 transitions, 39615 flow [2023-01-27 23:04:55,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=31503, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=39615, PETRI_PLACES=460, PETRI_TRANSITIONS=1574} [2023-01-27 23:04:55,365 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 441 predicate places. [2023-01-27 23:04:55,366 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1574 transitions, 39615 flow [2023-01-27 23:04:55,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 77.53333333333333) internal successors, (3489), 45 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:55,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:04:55,366 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:04:55,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 23:04:55,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:04:55,567 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:04:55,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:04:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 632320561, now seen corresponding path program 23 times [2023-01-27 23:04:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:04:55,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303673801] [2023-01-27 23:04:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:04:55,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:04:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:04:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 23:04:55,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:04:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303673801] [2023-01-27 23:04:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303673801] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:04:55,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486847233] [2023-01-27 23:04:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 23:04:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:04:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:04:55,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:04:55,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 23:04:55,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-27 23:04:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:04:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 23:04:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:04:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 23:04:55,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:04:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-27 23:04:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486847233] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:04:55,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:04:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2023-01-27 23:04:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48283537] [2023-01-27 23:04:55,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:04:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 23:04:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:04:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 23:04:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-01-27 23:04:55,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:04:55,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1574 transitions, 39615 flow. Second operand has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:04:55,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:04:55,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:04:55,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:05:15,535 INFO L130 PetriNetUnfolder]: 29418/53919 cut-off events. [2023-01-27 23:05:15,536 INFO L131 PetriNetUnfolder]: For 776234/776234 co-relation queries the response was YES. [2023-01-27 23:05:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347831 conditions, 53919 events. 29418/53919 cut-off events. For 776234/776234 co-relation queries the response was YES. Maximal size of possible extension queue 3031. Compared 537741 event pairs, 3586 based on Foata normal form. 18/53937 useless extension candidates. Maximal degree in co-relation 347735. Up to 33326 conditions per place. [2023-01-27 23:05:16,124 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 430 selfloop transitions, 1858 changer transitions 1/2289 dead transitions. [2023-01-27 23:05:16,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2289 transitions, 63135 flow [2023-01-27 23:05:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 23:05:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 23:05:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 956 transitions. [2023-01-27 23:05:16,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034228541337546 [2023-01-27 23:05:16,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 956 transitions. [2023-01-27 23:05:16,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 956 transitions. [2023-01-27 23:05:16,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:05:16,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 956 transitions. [2023-01-27 23:05:16,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 106.22222222222223) internal successors, (956), 9 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:05:16,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:05:16,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:05:16,128 INFO L175 Difference]: Start difference. First operand has 460 places, 1574 transitions, 39615 flow. Second operand 9 states and 956 transitions. [2023-01-27 23:05:16,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2289 transitions, 63135 flow [2023-01-27 23:05:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2289 transitions, 58714 flow, removed 787 selfloop flow, removed 16 redundant places. [2023-01-27 23:05:22,655 INFO L231 Difference]: Finished difference. Result has 453 places, 2231 transitions, 58277 flow [2023-01-27 23:05:22,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=35690, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=58277, PETRI_PLACES=453, PETRI_TRANSITIONS=2231} [2023-01-27 23:05:22,656 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 434 predicate places. [2023-01-27 23:05:22,656 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 2231 transitions, 58277 flow [2023-01-27 23:05:22,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.4) internal successors, (994), 10 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:05:22,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:05:22,657 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:05:22,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-27 23:05:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:05:22,862 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:05:22,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:05:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1696556976, now seen corresponding path program 24 times [2023-01-27 23:05:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:05:22,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138937018] [2023-01-27 23:05:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:05:22,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:05:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:05:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:05:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:05:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138937018] [2023-01-27 23:05:23,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138937018] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:05:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982271003] [2023-01-27 23:05:23,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 23:05:23,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:05:23,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:05:23,502 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:05:23,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 23:05:23,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-27 23:05:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:05:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-27 23:05:23,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:05:24,553 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-01-27 23:05:24,553 INFO L350 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 26 treesize of output 10 [2023-01-27 23:05:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:05:24,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:05:24,884 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-27 23:05:24,884 INFO L350 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 27 treesize of output 13 [2023-01-27 23:05:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-27 23:05:25,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982271003] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:05:25,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:05:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 54 [2023-01-27 23:05:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083731992] [2023-01-27 23:05:25,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:05:25,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-01-27 23:05:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:05:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-01-27 23:05:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2652, Unknown=0, NotChecked=0, Total=3080 [2023-01-27 23:05:25,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 211 [2023-01-27 23:05:25,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 2231 transitions, 58277 flow. Second operand has 56 states, 56 states have (on average 69.33928571428571) internal successors, (3883), 56 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:05:25,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:05:25,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 211 [2023-01-27 23:05:25,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:08:01,085 INFO L130 PetriNetUnfolder]: 60419/112988 cut-off events. [2023-01-27 23:08:01,085 INFO L131 PetriNetUnfolder]: For 1393161/1393161 co-relation queries the response was YES. [2023-01-27 23:08:02,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726938 conditions, 112988 events. 60419/112988 cut-off events. For 1393161/1393161 co-relation queries the response was YES. Maximal size of possible extension queue 6111. Compared 1260049 event pairs, 2354 based on Foata normal form. 2410/115398 useless extension candidates. Maximal degree in co-relation 696250. Up to 69693 conditions per place. [2023-01-27 23:08:02,327 INFO L137 encePairwiseOnDemand]: 204/211 looper letters, 1154 selfloop transitions, 3061 changer transitions 4235/8450 dead transitions. [2023-01-27 23:08:02,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 8450 transitions, 160916 flow [2023-01-27 23:08:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 534 states. [2023-01-27 23:08:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2023-01-27 23:08:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 40699 transitions. [2023-01-27 23:08:02,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36121021708646184 [2023-01-27 23:08:02,508 INFO L72 ComplementDD]: Start complementDD. Operand 534 states and 40699 transitions. [2023-01-27 23:08:02,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 40699 transitions. [2023-01-27 23:08:02,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:08:02,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 534 states and 40699 transitions. [2023-01-27 23:08:02,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 535 states, 534 states have (on average 76.21535580524345) internal successors, (40699), 534 states have internal predecessors, (40699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:08:02,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 535 states, 535 states have (on average 211.0) internal successors, (112885), 535 states have internal predecessors, (112885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:08:02,641 INFO L81 ComplementDD]: Finished complementDD. Result has 535 states, 535 states have (on average 211.0) internal successors, (112885), 535 states have internal predecessors, (112885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:08:02,642 INFO L175 Difference]: Start difference. First operand has 453 places, 2231 transitions, 58277 flow. Second operand 534 states and 40699 transitions. [2023-01-27 23:08:02,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 8450 transitions, 160916 flow [2023-01-27 23:08:33,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 8450 transitions, 156648 flow, removed 2134 selfloop flow, removed 0 redundant places. [2023-01-27 23:08:33,239 INFO L231 Difference]: Finished difference. Result has 1037 places, 3176 transitions, 87205 flow [2023-01-27 23:08:33,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=55383, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=534, PETRI_FLOW=87205, PETRI_PLACES=1037, PETRI_TRANSITIONS=3176} [2023-01-27 23:08:33,242 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1018 predicate places. [2023-01-27 23:08:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 1037 places, 3176 transitions, 87205 flow [2023-01-27 23:08:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 69.33928571428571) internal successors, (3883), 56 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:08:33,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:08:33,242 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:08:33,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 23:08:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 23:08:33,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:08:33,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:08:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash -619706638, now seen corresponding path program 25 times [2023-01-27 23:08:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:08:33,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624912580] [2023-01-27 23:08:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:08:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:08:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:08:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:08:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:08:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624912580] [2023-01-27 23:08:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624912580] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:08:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868936310] [2023-01-27 23:08:34,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 23:08:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:08:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:08:34,215 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:08:34,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 23:08:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:08:34,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-27 23:08:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:08:34,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 23:08:34,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-27 23:08:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:08:35,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:08:35,338 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1095 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1095) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 24)))) is different from false [2023-01-27 23:08:35,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 23:08:35,346 INFO L350 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 47 treesize of output 35 [2023-01-27 23:08:35,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-01-27 23:08:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 7 not checked. [2023-01-27 23:08:35,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868936310] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:08:35,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:08:35,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 17] total 62 [2023-01-27 23:08:35,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842792417] [2023-01-27 23:08:35,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:08:35,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-01-27 23:08:35,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:08:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-01-27 23:08:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3719, Unknown=1, NotChecked=122, Total=4032 [2023-01-27 23:08:35,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 211 [2023-01-27 23:08:35,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1037 places, 3176 transitions, 87205 flow. Second operand has 64 states, 64 states have (on average 72.359375) internal successors, (4631), 64 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:08:35,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:08:35,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 211 [2023-01-27 23:08:35,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:09:34,256 INFO L130 PetriNetUnfolder]: 44583/80837 cut-off events. [2023-01-27 23:09:34,256 INFO L131 PetriNetUnfolder]: For 1451441/1451441 co-relation queries the response was YES. [2023-01-27 23:09:35,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558906 conditions, 80837 events. 44583/80837 cut-off events. For 1451441/1451441 co-relation queries the response was YES. Maximal size of possible extension queue 4328. Compared 830162 event pairs, 2466 based on Foata normal form. 23/80860 useless extension candidates. Maximal degree in co-relation 557488. Up to 51275 conditions per place. [2023-01-27 23:09:35,854 INFO L137 encePairwiseOnDemand]: 201/211 looper letters, 423 selfloop transitions, 3214 changer transitions 217/3854 dead transitions. [2023-01-27 23:09:35,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 3854 transitions, 110132 flow [2023-01-27 23:09:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 23:09:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 23:09:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3121 transitions. [2023-01-27 23:09:35,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697867298578199 [2023-01-27 23:09:35,856 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3121 transitions. [2023-01-27 23:09:35,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3121 transitions. [2023-01-27 23:09:35,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:09:35,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3121 transitions. [2023-01-27 23:09:35,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 78.025) internal successors, (3121), 40 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:35,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:35,862 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 211.0) internal successors, (8651), 41 states have internal predecessors, (8651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:35,862 INFO L175 Difference]: Start difference. First operand has 1037 places, 3176 transitions, 87205 flow. Second operand 40 states and 3121 transitions. [2023-01-27 23:09:35,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 3854 transitions, 110132 flow [2023-01-27 23:09:59,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 3854 transitions, 86433 flow, removed 8389 selfloop flow, removed 71 redundant places. [2023-01-27 23:09:59,239 INFO L231 Difference]: Finished difference. Result has 849 places, 3472 transitions, 82719 flow [2023-01-27 23:09:59,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=67917, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=82719, PETRI_PLACES=849, PETRI_TRANSITIONS=3472} [2023-01-27 23:09:59,241 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 830 predicate places. [2023-01-27 23:09:59,241 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 3472 transitions, 82719 flow [2023-01-27 23:09:59,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 72.359375) internal successors, (4631), 64 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:09:59,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:09:59,242 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:09:59,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 23:09:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 23:09:59,446 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:09:59,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:09:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1483758468, now seen corresponding path program 26 times [2023-01-27 23:09:59,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:09:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412909343] [2023-01-27 23:09:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:09:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:09:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:09:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 54 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 23:09:59,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:09:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412909343] [2023-01-27 23:09:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412909343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:09:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798835309] [2023-01-27 23:09:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 23:09:59,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:09:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:09:59,772 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:09:59,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 23:09:59,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 23:09:59,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:09:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 23:09:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:10:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 23:10:00,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:10:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-27 23:10:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798835309] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:10:00,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:10:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 18] total 56 [2023-01-27 23:10:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101446596] [2023-01-27 23:10:00,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:10:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-01-27 23:10:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:10:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-01-27 23:10:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=2361, Unknown=0, NotChecked=0, Total=3192 [2023-01-27 23:10:00,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 211 [2023-01-27 23:10:00,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 3472 transitions, 82719 flow. Second operand has 57 states, 57 states have (on average 82.3859649122807) internal successors, (4696), 57 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:00,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:10:00,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 211 [2023-01-27 23:10:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:10:48,444 INFO L130 PetriNetUnfolder]: 38650/71225 cut-off events. [2023-01-27 23:10:48,444 INFO L131 PetriNetUnfolder]: For 917226/917226 co-relation queries the response was YES. [2023-01-27 23:10:49,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504044 conditions, 71225 events. 38650/71225 cut-off events. For 917226/917226 co-relation queries the response was YES. Maximal size of possible extension queue 3772. Compared 737587 event pairs, 21622 based on Foata normal form. 139/71364 useless extension candidates. Maximal degree in co-relation 503926. Up to 69236 conditions per place. [2023-01-27 23:10:49,510 INFO L137 encePairwiseOnDemand]: 206/211 looper letters, 2985 selfloop transitions, 9 changer transitions 188/3182 dead transitions. [2023-01-27 23:10:49,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 3182 transitions, 84170 flow [2023-01-27 23:10:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 23:10:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 23:10:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2177 transitions. [2023-01-27 23:10:49,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127014218009479 [2023-01-27 23:10:49,513 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2177 transitions. [2023-01-27 23:10:49,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2177 transitions. [2023-01-27 23:10:49,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:10:49,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2177 transitions. [2023-01-27 23:10:49,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.08) internal successors, (2177), 25 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:49,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:49,517 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 211.0) internal successors, (5486), 26 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:10:49,517 INFO L175 Difference]: Start difference. First operand has 849 places, 3472 transitions, 82719 flow. Second operand 25 states and 2177 transitions. [2023-01-27 23:10:49,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 3182 transitions, 84170 flow [2023-01-27 23:11:10,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 3182 transitions, 81969 flow, removed 922 selfloop flow, removed 30 redundant places. [2023-01-27 23:11:10,246 INFO L231 Difference]: Finished difference. Result has 630 places, 2994 transitions, 73644 flow [2023-01-27 23:11:10,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=74940, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=73644, PETRI_PLACES=630, PETRI_TRANSITIONS=2994} [2023-01-27 23:11:10,248 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 611 predicate places. [2023-01-27 23:11:10,248 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 2994 transitions, 73644 flow [2023-01-27 23:11:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 82.3859649122807) internal successors, (4696), 57 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:10,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:11:10,249 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:11:10,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 23:11:10,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-27 23:11:10,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:11:10,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:11:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1401868673, now seen corresponding path program 27 times [2023-01-27 23:11:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:11:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107677363] [2023-01-27 23:11:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:11:10,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:11:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:11:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-27 23:11:10,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:11:10,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107677363] [2023-01-27 23:11:10,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107677363] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:11:10,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611670279] [2023-01-27 23:11:10,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 23:11:10,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:11:10,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:11:10,595 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:11:10,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 23:11:10,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-27 23:11:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:11:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 23:11:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:11:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-27 23:11:10,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:11:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-01-27 23:11:10,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611670279] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:11:10,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:11:10,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2023-01-27 23:11:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367187668] [2023-01-27 23:11:10,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:11:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 23:11:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:11:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 23:11:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2023-01-27 23:11:10,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2023-01-27 23:11:10,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 2994 transitions, 73644 flow. Second operand has 11 states, 11 states have (on average 99.0909090909091) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:11:10,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:11:10,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2023-01-27 23:11:10,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:12:07,454 INFO L130 PetriNetUnfolder]: 55244/101826 cut-off events. [2023-01-27 23:12:07,454 INFO L131 PetriNetUnfolder]: For 1479469/1479469 co-relation queries the response was YES. [2023-01-27 23:12:08,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683189 conditions, 101826 events. 55244/101826 cut-off events. For 1479469/1479469 co-relation queries the response was YES. Maximal size of possible extension queue 5382. Compared 1099878 event pairs, 6799 based on Foata normal form. 12/101838 useless extension candidates. Maximal degree in co-relation 683084. Up to 62720 conditions per place. [2023-01-27 23:12:08,792 INFO L137 encePairwiseOnDemand]: 208/211 looper letters, 796 selfloop transitions, 3620 changer transitions 2/4418 dead transitions. [2023-01-27 23:12:08,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 4418 transitions, 113082 flow [2023-01-27 23:12:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 23:12:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 23:12:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1063 transitions. [2023-01-27 23:12:08,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037914691943128 [2023-01-27 23:12:08,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1063 transitions. [2023-01-27 23:12:08,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1063 transitions. [2023-01-27 23:12:08,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:12:08,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1063 transitions. [2023-01-27 23:12:08,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.3) internal successors, (1063), 10 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:08,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:08,795 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 211.0) internal successors, (2321), 11 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:08,795 INFO L175 Difference]: Start difference. First operand has 630 places, 2994 transitions, 73644 flow. Second operand 10 states and 1063 transitions. [2023-01-27 23:12:08,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 4418 transitions, 113082 flow [2023-01-27 23:12:37,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 4418 transitions, 112925 flow, removed 27 selfloop flow, removed 12 redundant places. [2023-01-27 23:12:37,450 INFO L231 Difference]: Finished difference. Result has 550 places, 4352 transitions, 112683 flow [2023-01-27 23:12:37,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=73535, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2994, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=112683, PETRI_PLACES=550, PETRI_TRANSITIONS=4352} [2023-01-27 23:12:37,452 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 531 predicate places. [2023-01-27 23:12:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 4352 transitions, 112683 flow [2023-01-27 23:12:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 99.0909090909091) internal successors, (1090), 11 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:37,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 23:12:37,452 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 23:12:37,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 23:12:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:37,653 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 23:12:37,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 23:12:37,653 INFO L85 PathProgramCache]: Analyzing trace with hash -768275100, now seen corresponding path program 28 times [2023-01-27 23:12:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 23:12:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026530734] [2023-01-27 23:12:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 23:12:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 23:12:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 23:12:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 23:12:38,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 23:12:38,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026530734] [2023-01-27 23:12:38,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026530734] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 23:12:38,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172635041] [2023-01-27 23:12:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 23:12:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:12:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 23:12:38,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 23:12:38,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 23:12:38,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 23:12:38,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 23:12:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-27 23:12:38,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 23:12:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 23:12:39,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 23:12:39,361 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 23:12:39,361 INFO L350 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 28 treesize of output 11 [2023-01-27 23:12:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-01-27 23:12:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172635041] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 23:12:39,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 23:12:39,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 16] total 57 [2023-01-27 23:12:39,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924260620] [2023-01-27 23:12:39,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 23:12:39,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-01-27 23:12:39,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 23:12:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-01-27 23:12:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3240, Unknown=0, NotChecked=0, Total=3422 [2023-01-27 23:12:39,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 211 [2023-01-27 23:12:39,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 4352 transitions, 112683 flow. Second operand has 59 states, 59 states have (on average 76.35593220338983) internal successors, (4505), 59 states have internal predecessors, (4505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:12:39,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 23:12:39,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 211 [2023-01-27 23:12:39,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 23:15:07,850 INFO L130 PetriNetUnfolder]: 89272/164662 cut-off events. [2023-01-27 23:15:07,850 INFO L131 PetriNetUnfolder]: For 2563097/2563097 co-relation queries the response was YES. [2023-01-27 23:15:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158722 conditions, 164662 events. 89272/164662 cut-off events. For 2563097/2563097 co-relation queries the response was YES. Maximal size of possible extension queue 8262. Compared 1871572 event pairs, 5625 based on Foata normal form. 30/164692 useless extension candidates. Maximal degree in co-relation 1158620. Up to 102086 conditions per place. [2023-01-27 23:15:09,915 INFO L137 encePairwiseOnDemand]: 205/211 looper letters, 1384 selfloop transitions, 6956 changer transitions 1505/9845 dead transitions. [2023-01-27 23:15:09,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 968 places, 9845 transitions, 215032 flow [2023-01-27 23:15:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2023-01-27 23:15:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2023-01-27 23:15:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 34798 transitions. [2023-01-27 23:15:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39360246128787796 [2023-01-27 23:15:09,932 INFO L72 ComplementDD]: Start complementDD. Operand 419 states and 34798 transitions. [2023-01-27 23:15:09,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 34798 transitions. [2023-01-27 23:15:09,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 23:15:09,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 419 states and 34798 transitions. [2023-01-27 23:15:09,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 420 states, 419 states have (on average 83.05011933174224) internal successors, (34798), 419 states have internal predecessors, (34798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 420 states, 420 states have (on average 211.0) internal successors, (88620), 420 states have internal predecessors, (88620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,014 INFO L81 ComplementDD]: Finished complementDD. Result has 420 states, 420 states have (on average 211.0) internal successors, (88620), 420 states have internal predecessors, (88620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 23:15:10,015 INFO L175 Difference]: Start difference. First operand has 550 places, 4352 transitions, 112683 flow. Second operand 419 states and 34798 transitions. [2023-01-27 23:15:10,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 968 places, 9845 transitions, 215032 flow Received shutdown request... [2023-01-27 23:15:42,610 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:15:42,610 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-27 23:15:42,668 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 23:15:42,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 23:15:42,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 23:15:42,873 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-27 23:15:42,874 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 23:15:42,874 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 23:15:42,874 INFO L445 BasicCegarLoop]: Path program histogram: [28, 1, 1, 1] [2023-01-27 23:15:42,876 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 23:15:42,876 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 23:15:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 11:15:42 BasicIcfg [2023-01-27 23:15:42,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 23:15:42,878 INFO L158 Benchmark]: Toolchain (without parser) took 802289.49ms. Allocated memory was 400.6MB in the beginning and 7.5GB in the end (delta: 7.1GB). Free memory was 360.4MB in the beginning and 3.7GB in the end (delta: -3.3GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-01-27 23:15:42,878 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 212.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 23:15:42,878 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.54ms. Allocated memory is still 400.6MB. Free memory was 360.4MB in the beginning and 349.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 23:15:42,878 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.62ms. Allocated memory is still 400.6MB. Free memory was 349.1MB in the beginning and 347.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:15:42,879 INFO L158 Benchmark]: Boogie Preprocessor took 16.57ms. Allocated memory is still 400.6MB. Free memory was 347.1MB in the beginning and 345.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 23:15:42,879 INFO L158 Benchmark]: RCFGBuilder took 416.27ms. Allocated memory is still 400.6MB. Free memory was 345.7MB in the beginning and 323.4MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-01-27 23:15:42,879 INFO L158 Benchmark]: TraceAbstraction took 801677.67ms. Allocated memory was 400.6MB in the beginning and 7.5GB in the end (delta: 7.1GB). Free memory was 322.7MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-01-27 23:15:42,880 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 212.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 153.54ms. Allocated memory is still 400.6MB. Free memory was 360.4MB in the beginning and 349.1MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 21.62ms. Allocated memory is still 400.6MB. Free memory was 349.1MB in the beginning and 347.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.57ms. Allocated memory is still 400.6MB. Free memory was 347.1MB in the beginning and 345.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 416.27ms. Allocated memory is still 400.6MB. Free memory was 345.7MB in the beginning and 323.4MB in the end (delta: 22.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 801677.67ms. Allocated memory was 400.6MB in the beginning and 7.5GB in the end (delta: 7.1GB). Free memory was 322.7MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 98 PlacesBefore, 19 PlacesAfterwards, 100 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 58 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 101 TotalNumberOfCompositions, 513 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 505, independent: 499, independent conditional: 0, independent unconditional: 499, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 255, independent: 252, independent conditional: 0, independent unconditional: 252, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 505, independent: 247, independent conditional: 0, independent unconditional: 247, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 255, unknown conditional: 0, unknown unconditional: 255] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 801.6s, OverallIterations: 31, TraceHistogramMax: 8, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 760.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 24624 SdHoareTripleChecker+Valid, 27.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24624 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 23.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 800 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1400 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53097 IncrementalHoareTripleChecker+Invalid, 55304 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1400 mSolverCounterUnsat, 0 mSDtfsCounter, 53097 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3359 GetRequests, 889 SyntacticMatches, 55 SemanticMatches, 2415 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 257445 ImplicationChecksByTransitivity, 153.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112683occurred in iteration=30, InterpolantAutomatonStates: 1416, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 27.9s InterpolantComputationTime, 1443 NumberOfCodeBlocks, 1442 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2058 ConstructedInterpolants, 123 QuantifiedInterpolants, 20408 SizeOfPredicates, 275 NumberOfNonLiveVariables, 7877 ConjunctsInSsa, 908 ConjunctsInUnsatCore, 87 InterpolantComputations, 3 PerfectInterpolantSequences, 1510/3537 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown