/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:14:21,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:14:21,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:14:21,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:14:21,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:14:21,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:14:21,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:14:21,384 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:14:21,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:14:21,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:14:21,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:14:21,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:14:21,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:14:21,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:14:21,386 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:14:21,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:14:21,386 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:14:21,387 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:14:21,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:14:21,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:14:21,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:14:21,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:14:21,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:14:21,388 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:14:21,388 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:14:21,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:14:21,389 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:14:21,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:14:21,389 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:14:21,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:14:21,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:14:21,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:14:21,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:14:21,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:14:21,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:14:21,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:14:21,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:14:21,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:14:21,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:14:21,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:14:21,391 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:14:21,392 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:14:21,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:14:21,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:14:21,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:14:21,613 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:14:21,615 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:14:21,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 03:14:22,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:14:22,857 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:14:22,858 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 03:14:22,865 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1bfb0a3/eda2844df374488d92da18a049e29c9b/FLAG48e36c23f [2023-08-04 03:14:22,876 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb1bfb0a3/eda2844df374488d92da18a049e29c9b [2023-08-04 03:14:22,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:14:22,879 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:14:22,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:14:22,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:14:22,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:14:22,883 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:14:22" (1/1) ... [2023-08-04 03:14:22,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539ed053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:22, skipping insertion in model container [2023-08-04 03:14:22,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:14:22" (1/1) ... [2023-08-04 03:14:22,905 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:14:23,055 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c[3299,3312] [2023-08-04 03:14:23,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:14:23,064 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:14:23,080 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons.wvr_bound2.c[3299,3312] [2023-08-04 03:14:23,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:14:23,087 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:14:23,087 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:14:23,092 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:14:23,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23 WrapperNode [2023-08-04 03:14:23,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:14:23,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:14:23,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:14:23,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:14:23,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,119 INFO L138 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 218 [2023-08-04 03:14:23,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:14:23,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:14:23,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:14:23,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:14:23,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:14:23,157 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:14:23,157 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:14:23,157 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:14:23,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (1/1) ... [2023-08-04 03:14:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:14:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:14:23,202 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) [2023-08-04 03:14:23,271 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 [2023-08-04 03:14:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:14:23,299 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:14:23,300 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:14:23,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:14:23,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:14:23,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:14:23,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:14:23,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:14:23,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:14:23,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:14:23,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:14:23,304 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:14:23,429 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:14:23,430 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:14:23,671 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:14:23,734 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:14:23,734 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 03:14:23,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:14:23 BoogieIcfgContainer [2023-08-04 03:14:23,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:14:23,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:14:23,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:14:23,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:14:23,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:14:22" (1/3) ... [2023-08-04 03:14:23,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101c2884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:14:23, skipping insertion in model container [2023-08-04 03:14:23,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:14:23" (2/3) ... [2023-08-04 03:14:23,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101c2884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:14:23, skipping insertion in model container [2023-08-04 03:14:23,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:14:23" (3/3) ... [2023-08-04 03:14:23,757 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-prod-cons.wvr_bound2.c [2023-08-04 03:14:23,763 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:14:23,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:14:23,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:14:23,769 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:14:23,837 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:14:23,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,042 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 03:14:24,042 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:14:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 03:14:24,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,060 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:14:24,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 434 flow [2023-08-04 03:14:24,134 INFO L124 PetriNetUnfolderBase]: 94/643 cut-off events. [2023-08-04 03:14:24,135 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:14:24,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 643 events. 94/643 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3081 event pairs, 0 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-04 03:14:24,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 4682 [2023-08-04 03:14:28,688 INFO L134 LiptonReduction]: Checked pairs total: 10681 [2023-08-04 03:14:28,689 INFO L136 LiptonReduction]: Total number of compositions: 176 [2023-08-04 03:14:28,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:14:28,704 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=true, 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;@7ca73a13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:14:28,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:14:28,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:14:28,709 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2023-08-04 03:14:28,709 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:14:28,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:14:28,709 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:14:28,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:14:28,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:14:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash 857534795, now seen corresponding path program 1 times [2023-08-04 03:14:28,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:14:28,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959650464] [2023-08-04 03:14:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:14:28,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:14:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:14:28,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:14:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:14:28,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:14:28,907 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:14:28,908 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:14:28,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:14:28,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:14:28,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:14:28,910 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:14:28,915 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:14:28,916 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:14:28,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:14:28,945 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:14:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,356 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 03:14:29,356 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:14:29,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32161 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 03:14:29,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:14:29,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:14:29,720 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 03:14:29,720 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:14:29,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32161 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 03:14:29,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 11848 [2023-08-04 03:14:33,849 INFO L134 LiptonReduction]: Checked pairs total: 36542 [2023-08-04 03:14:33,849 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-04 03:14:33,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:14:33,867 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=true, 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;@7ca73a13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:14:33,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:14:33,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:14:33,874 INFO L124 PetriNetUnfolderBase]: 12/118 cut-off events. [2023-08-04 03:14:33,874 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:14:33,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:14:33,874 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:14:33,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:14:33,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:14:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1543089095, now seen corresponding path program 1 times [2023-08-04 03:14:33,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:14:33,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070458172] [2023-08-04 03:14:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:14:33,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:14:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:14:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:14:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:14:34,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070458172] [2023-08-04 03:14:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070458172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:14:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795591671] [2023-08-04 03:14:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:14:34,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:14:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:14:34,061 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) [2023-08-04 03:14:34,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:14:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:14:34,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:14:34,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:14:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:14:34,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:14:34,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795591671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:14:34,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:14:34,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:14:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211558358] [2023-08-04 03:14:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:14:34,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:14:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:14:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:14:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:14:34,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:14:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 186.8) internal successors, (934), 5 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:34,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:14:34,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:14:34,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:14:55,291 INFO L124 PetriNetUnfolderBase]: 269782/353128 cut-off events. [2023-08-04 03:14:55,292 INFO L125 PetriNetUnfolderBase]: For 49084/49084 co-relation queries the response was YES. [2023-08-04 03:14:56,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709987 conditions, 353128 events. 269782/353128 cut-off events. For 49084/49084 co-relation queries the response was YES. Maximal size of possible extension queue 8027. Compared 2360362 event pairs, 125724 based on Foata normal form. 0/256374 useless extension candidates. Maximal degree in co-relation 260370. Up to 327413 conditions per place. [2023-08-04 03:14:57,084 INFO L140 encePairwiseOnDemand]: 418/423 looper letters, 64 selfloop transitions, 5 changer transitions 3/86 dead transitions. [2023-08-04 03:14:57,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 402 flow [2023-08-04 03:14:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:14:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:14:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 999 transitions. [2023-08-04 03:14:57,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723404255319149 [2023-08-04 03:14:57,102 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 999 transitions. [2023-08-04 03:14:57,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 999 transitions. [2023-08-04 03:14:57,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:14:57,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 999 transitions. [2023-08-04 03:14:57,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:57,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:57,123 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:57,124 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 5 states and 999 transitions. [2023-08-04 03:14:57,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 402 flow [2023-08-04 03:14:57,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:14:57,173 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 232 flow [2023-08-04 03:14:57,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2023-08-04 03:14:57,177 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-04 03:14:57,178 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 232 flow [2023-08-04 03:14:57,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 186.8) internal successors, (934), 5 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:57,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:14:57,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:14:57,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:14:57,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:14:57,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:14:57,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:14:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1605741612, now seen corresponding path program 1 times [2023-08-04 03:14:57,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:14:57,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250885407] [2023-08-04 03:14:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:14:57,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:14:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:14:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:14:57,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:14:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250885407] [2023-08-04 03:14:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250885407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:14:57,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:14:57,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:14:57,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311490513] [2023-08-04 03:14:57,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:14:57,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:14:57,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:14:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:14:57,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:14:57,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:14:57,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:14:57,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:14:57,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:14:57,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:15:13,881 INFO L124 PetriNetUnfolderBase]: 233353/305199 cut-off events. [2023-08-04 03:15:13,882 INFO L125 PetriNetUnfolderBase]: For 32602/32602 co-relation queries the response was YES. [2023-08-04 03:15:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604107 conditions, 305199 events. 233353/305199 cut-off events. For 32602/32602 co-relation queries the response was YES. Maximal size of possible extension queue 6907. Compared 1998384 event pairs, 144495 based on Foata normal form. 1/221111 useless extension candidates. Maximal degree in co-relation 223815. Up to 279337 conditions per place. [2023-08-04 03:15:15,578 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 60 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 03:15:15,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 361 flow [2023-08-04 03:15:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:15:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:15:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-04 03:15:15,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48857368006304175 [2023-08-04 03:15:15,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-04 03:15:15,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-04 03:15:15,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:15:15,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-04 03:15:15,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:15,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:15,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:15,598 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 232 flow. Second operand 3 states and 620 transitions. [2023-08-04 03:15:15,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 361 flow [2023-08-04 03:15:15,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 358 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:15:15,628 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 228 flow [2023-08-04 03:15:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2023-08-04 03:15:15,629 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:15:15,630 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 228 flow [2023-08-04 03:15:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:15:15,630 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:15:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:15:15,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:15:15,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:15:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1421496815, now seen corresponding path program 1 times [2023-08-04 03:15:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:15:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671367566] [2023-08-04 03:15:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:15:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:15:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:15:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671367566] [2023-08-04 03:15:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671367566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:15:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974786515] [2023-08-04 03:15:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:15,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:15:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:15:15,725 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) [2023-08-04 03:15:15,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:15:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:15,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:15:15,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:15:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:15:15,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:15:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:15:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974786515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:15:15,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:15:15,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:15:15,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680779232] [2023-08-04 03:15:15,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:15:15,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:15:15,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:15:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:15:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:15:15,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:15:15,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:15,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:15:15,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:15:15,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:15:31,488 INFO L124 PetriNetUnfolderBase]: 226787/295233 cut-off events. [2023-08-04 03:15:31,488 INFO L125 PetriNetUnfolderBase]: For 31760/31760 co-relation queries the response was YES. [2023-08-04 03:15:32,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584815 conditions, 295233 events. 226787/295233 cut-off events. For 31760/31760 co-relation queries the response was YES. Maximal size of possible extension queue 7073. Compared 1905361 event pairs, 107071 based on Foata normal form. 4/213276 useless extension candidates. Maximal degree in co-relation 255989. Up to 270927 conditions per place. [2023-08-04 03:15:32,862 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 64 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 03:15:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 81 transitions, 379 flow [2023-08-04 03:15:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:15:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:15:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-08-04 03:15:32,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47754137115839246 [2023-08-04 03:15:32,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-08-04 03:15:32,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-08-04 03:15:32,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:15:32,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-08-04 03:15:32,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:32,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:32,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:32,872 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 228 flow. Second operand 4 states and 808 transitions. [2023-08-04 03:15:32,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 81 transitions, 379 flow [2023-08-04 03:15:32,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:15:32,879 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 225 flow [2023-08-04 03:15:32,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-04 03:15:32,880 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-04 03:15:32,880 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 225 flow [2023-08-04 03:15:32,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:32,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:15:32,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:15:33,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:15:33,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:15:33,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:15:33,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:15:33,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1707250835, now seen corresponding path program 1 times [2023-08-04 03:15:33,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:15:33,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285213047] [2023-08-04 03:15:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:33,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:15:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:15:33,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:15:33,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285213047] [2023-08-04 03:15:33,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285213047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:15:33,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032017510] [2023-08-04 03:15:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:33,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:15:33,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:15:33,177 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) [2023-08-04 03:15:33,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:15:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:33,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:15:33,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:15:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:15:33,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:15:33,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032017510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:15:33,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:15:33,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:15:33,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119518158] [2023-08-04 03:15:33,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:15:33,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:15:33,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:15:33,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:15:33,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:15:33,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:15:33,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:33,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:15:33,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:15:33,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:15:48,119 INFO L124 PetriNetUnfolderBase]: 218295/281406 cut-off events. [2023-08-04 03:15:48,119 INFO L125 PetriNetUnfolderBase]: For 24160/24160 co-relation queries the response was YES. [2023-08-04 03:15:48,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570418 conditions, 281406 events. 218295/281406 cut-off events. For 24160/24160 co-relation queries the response was YES. Maximal size of possible extension queue 6632. Compared 1809997 event pairs, 32869 based on Foata normal form. 0/200500 useless extension candidates. Maximal degree in co-relation 185258. Up to 267623 conditions per place. [2023-08-04 03:15:49,745 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 83 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-08-04 03:15:49,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 459 flow [2023-08-04 03:15:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:15:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:15:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-08-04 03:15:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789598108747045 [2023-08-04 03:15:49,748 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-08-04 03:15:49,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-08-04 03:15:49,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:15:49,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-08-04 03:15:49,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:49,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:49,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:49,753 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 225 flow. Second operand 5 states and 1013 transitions. [2023-08-04 03:15:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 459 flow [2023-08-04 03:15:49,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 445 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 03:15:49,767 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 230 flow [2023-08-04 03:15:49,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2023-08-04 03:15:49,768 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:15:49,768 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 230 flow [2023-08-04 03:15:49,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.8) internal successors, (939), 5 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:15:49,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:15:49,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:15:49,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:15:49,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:15:49,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:15:49,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1087011169, now seen corresponding path program 1 times [2023-08-04 03:15:49,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:15:49,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402039288] [2023-08-04 03:15:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:15:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:15:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:15:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:15:50,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:15:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402039288] [2023-08-04 03:15:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402039288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:15:50,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:15:50,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:15:50,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210788457] [2023-08-04 03:15:50,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:15:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:15:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:15:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:15:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:15:50,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:15:50,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:15:50,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:15:50,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:15:50,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:16:04,383 INFO L124 PetriNetUnfolderBase]: 211432/271720 cut-off events. [2023-08-04 03:16:04,384 INFO L125 PetriNetUnfolderBase]: For 20793/20793 co-relation queries the response was YES. [2023-08-04 03:16:05,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548606 conditions, 271720 events. 211432/271720 cut-off events. For 20793/20793 co-relation queries the response was YES. Maximal size of possible extension queue 6607. Compared 1685436 event pairs, 120022 based on Foata normal form. 16/193642 useless extension candidates. Maximal degree in co-relation 167361. Up to 260059 conditions per place. [2023-08-04 03:16:05,945 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 03:16:05,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 385 flow [2023-08-04 03:16:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:16:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:16:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 03:16:05,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933018124507486 [2023-08-04 03:16:05,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 03:16:05,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 03:16:05,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:16:05,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 03:16:05,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:05,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:05,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:05,953 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 230 flow. Second operand 3 states and 626 transitions. [2023-08-04 03:16:05,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 385 flow [2023-08-04 03:16:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:16:05,961 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 228 flow [2023-08-04 03:16:05,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2023-08-04 03:16:05,962 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-04 03:16:05,962 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 228 flow [2023-08-04 03:16:05,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:05,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:16:05,963 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:16:05,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:16:05,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:16:05,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:16:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash -362804475, now seen corresponding path program 1 times [2023-08-04 03:16:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:16:05,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534199513] [2023-08-04 03:16:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:16:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:16:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:16:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:16:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:16:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534199513] [2023-08-04 03:16:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534199513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:16:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210675696] [2023-08-04 03:16:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:16:06,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:16:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:16:06,015 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) [2023-08-04 03:16:06,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:16:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:16:06,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:16:06,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:16:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:16:06,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:16:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:16:06,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210675696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:16:06,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:16:06,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:16:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513608311] [2023-08-04 03:16:06,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:16:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:16:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:16:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:16:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:16:06,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:16:06,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:06,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:16:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:16:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:16:20,525 INFO L124 PetriNetUnfolderBase]: 205992/264232 cut-off events. [2023-08-04 03:16:20,526 INFO L125 PetriNetUnfolderBase]: For 20249/20249 co-relation queries the response was YES. [2023-08-04 03:16:21,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533710 conditions, 264232 events. 205992/264232 cut-off events. For 20249/20249 co-relation queries the response was YES. Maximal size of possible extension queue 6612. Compared 1617678 event pairs, 88482 based on Foata normal form. 64/188122 useless extension candidates. Maximal degree in co-relation 166097. Up to 251771 conditions per place. [2023-08-04 03:16:21,966 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 77 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-04 03:16:21,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 429 flow [2023-08-04 03:16:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:16:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:16:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 820 transitions. [2023-08-04 03:16:21,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846335697399527 [2023-08-04 03:16:21,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 820 transitions. [2023-08-04 03:16:21,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 820 transitions. [2023-08-04 03:16:21,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:16:21,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 820 transitions. [2023-08-04 03:16:21,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:21,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:21,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:21,973 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 228 flow. Second operand 4 states and 820 transitions. [2023-08-04 03:16:21,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 429 flow [2023-08-04 03:16:21,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:16:21,977 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 225 flow [2023-08-04 03:16:21,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-04 03:16:21,978 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-04 03:16:21,978 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 225 flow [2023-08-04 03:16:21,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:21,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:16:21,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:16:21,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:16:22,182 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 [2023-08-04 03:16:22,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:16:22,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:16:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1675381238, now seen corresponding path program 1 times [2023-08-04 03:16:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:16:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781938675] [2023-08-04 03:16:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:16:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:16:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:16:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:16:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:16:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781938675] [2023-08-04 03:16:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781938675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:16:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731603494] [2023-08-04 03:16:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:16:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:16:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:16:22,248 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) [2023-08-04 03:16:22,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:16:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:16:22,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:16:22,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:16:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:16:22,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:16:22,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731603494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:16:22,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:16:22,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:16:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870349230] [2023-08-04 03:16:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:16:22,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:16:22,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:16:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:16:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:16:22,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:16:22,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:22,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:16:22,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:16:22,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:16:35,671 INFO L124 PetriNetUnfolderBase]: 200968/259232 cut-off events. [2023-08-04 03:16:35,672 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2023-08-04 03:16:36,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521798 conditions, 259232 events. 200968/259232 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 6570. Compared 1621009 event pairs, 2802 based on Foata normal form. 0/186106 useless extension candidates. Maximal degree in co-relation 166545. Up to 227854 conditions per place. [2023-08-04 03:16:36,473 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 0 selfloop transitions, 0 changer transitions 113/113 dead transitions. [2023-08-04 03:16:36,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 113 transitions, 507 flow [2023-08-04 03:16:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:16:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:16:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1025 transitions. [2023-08-04 03:16:36,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846335697399527 [2023-08-04 03:16:36,475 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1025 transitions. [2023-08-04 03:16:36,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1025 transitions. [2023-08-04 03:16:36,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:16:36,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1025 transitions. [2023-08-04 03:16:36,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:36,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:36,479 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:36,479 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 225 flow. Second operand 5 states and 1025 transitions. [2023-08-04 03:16:36,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 113 transitions, 507 flow [2023-08-04 03:16:36,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 113 transitions, 493 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 03:16:36,541 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2023-08-04 03:16:36,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2023-08-04 03:16:36,542 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:16:36,542 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2023-08-04 03:16:36,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:36,542 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:16:36,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:16:36,543 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:16:36,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:16:36,743 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 [2023-08-04 03:16:36,743 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:16:36,744 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:16:36,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:36,992 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 03:16:36,993 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:16:37,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32161 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 03:16:37,009 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:37,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:37,020 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:16:37,020 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:37,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:37,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 234 transitions, 558 flow [2023-08-04 03:16:37,444 INFO L124 PetriNetUnfolderBase]: 857/4037 cut-off events. [2023-08-04 03:16:37,444 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:16:37,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 4037 events. 857/4037 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 32161 event pairs, 22 based on Foata normal form. 0/3424 useless extension candidates. Maximal degree in co-relation 2396. Up to 192 conditions per place. [2023-08-04 03:16:37,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 11848 [2023-08-04 03:16:41,837 INFO L134 LiptonReduction]: Checked pairs total: 33809 [2023-08-04 03:16:41,838 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 03:16:41,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:16:41,839 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=true, 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;@7ca73a13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:16:41,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:16:41,841 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:16:41,841 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-04 03:16:41,842 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:16:41,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:16:41,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:16:41,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:16:41,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:16:41,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2061060069, now seen corresponding path program 1 times [2023-08-04 03:16:41,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:16:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903089139] [2023-08-04 03:16:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:16:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:16:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:16:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:16:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:16:41,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903089139] [2023-08-04 03:16:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903089139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:16:41,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:16:41,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:16:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226530890] [2023-08-04 03:16:41,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:16:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:16:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:16:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:16:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:16:41,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:16:41,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:16:41,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:16:41,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:16:41,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:17:00,394 INFO L124 PetriNetUnfolderBase]: 270741/354562 cut-off events. [2023-08-04 03:17:00,395 INFO L125 PetriNetUnfolderBase]: For 47969/47969 co-relation queries the response was YES. [2023-08-04 03:17:01,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709902 conditions, 354562 events. 270741/354562 cut-off events. For 47969/47969 co-relation queries the response was YES. Maximal size of possible extension queue 8104. Compared 2365560 event pairs, 165225 based on Foata normal form. 0/258110 useless extension candidates. Maximal degree in co-relation 262198. Up to 326037 conditions per place. [2023-08-04 03:17:02,407 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 62 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 03:17:02,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 376 flow [2023-08-04 03:17:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:17:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:17:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 624 transitions. [2023-08-04 03:17:02,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894117647058824 [2023-08-04 03:17:02,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 624 transitions. [2023-08-04 03:17:02,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 624 transitions. [2023-08-04 03:17:02,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:17:02,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 624 transitions. [2023-08-04 03:17:02,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:02,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:02,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:02,412 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 3 states and 624 transitions. [2023-08-04 03:17:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 376 flow [2023-08-04 03:17:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:17:02,429 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 244 flow [2023-08-04 03:17:02,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 03:17:02,429 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:17:02,430 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 244 flow [2023-08-04 03:17:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:17:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:17:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:17:02,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:17:02,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:17:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash 531618064, now seen corresponding path program 1 times [2023-08-04 03:17:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:17:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304510288] [2023-08-04 03:17:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:17:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:17:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:17:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304510288] [2023-08-04 03:17:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304510288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:17:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212368609] [2023-08-04 03:17:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:17:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:17:02,455 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) [2023-08-04 03:17:02,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:17:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:02,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:17:02,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:17:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:17:02,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:17:02,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212368609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:17:02,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:17:02,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:17:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566389847] [2023-08-04 03:17:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:17:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:17:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:17:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:17:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:17:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:17:02,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:02,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:17:02,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:17:02,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:17:21,518 INFO L124 PetriNetUnfolderBase]: 263981/342960 cut-off events. [2023-08-04 03:17:21,518 INFO L125 PetriNetUnfolderBase]: For 40695/40695 co-relation queries the response was YES. [2023-08-04 03:17:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697370 conditions, 342960 events. 263981/342960 cut-off events. For 40695/40695 co-relation queries the response was YES. Maximal size of possible extension queue 7919. Compared 2237383 event pairs, 151891 based on Foata normal form. 0/246960 useless extension candidates. Maximal degree in co-relation 306306. Up to 323968 conditions per place. [2023-08-04 03:17:23,562 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 03:17:23,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 408 flow [2023-08-04 03:17:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:17:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:17:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 629 transitions. [2023-08-04 03:17:23,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-08-04 03:17:23,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 629 transitions. [2023-08-04 03:17:23,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 629 transitions. [2023-08-04 03:17:23,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:17:23,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 629 transitions. [2023-08-04 03:17:23,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:23,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:23,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:23,567 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 244 flow. Second operand 3 states and 629 transitions. [2023-08-04 03:17:23,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 408 flow [2023-08-04 03:17:23,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:17:23,590 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 250 flow [2023-08-04 03:17:23,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 03:17:23,591 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:17:23,591 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 250 flow [2023-08-04 03:17:23,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:23,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:17:23,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:17:23,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:17:23,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:17:23,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:17:23,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:17:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1534327521, now seen corresponding path program 1 times [2023-08-04 03:17:23,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:17:23,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390674734] [2023-08-04 03:17:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:23,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:17:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:17:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:17:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390674734] [2023-08-04 03:17:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390674734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:17:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073651651] [2023-08-04 03:17:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:17:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:17:23,836 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) [2023-08-04 03:17:23,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:17:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:23,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:17:23,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:17:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:17:23,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:17:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073651651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:17:23,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:17:23,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:17:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303798918] [2023-08-04 03:17:23,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:17:23,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:17:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:17:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:17:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:17:23,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:17:23,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:23,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:17:23,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:17:23,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:17:42,602 INFO L124 PetriNetUnfolderBase]: 261941/340858 cut-off events. [2023-08-04 03:17:42,603 INFO L125 PetriNetUnfolderBase]: For 28269/28269 co-relation queries the response was YES. [2023-08-04 03:17:43,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695762 conditions, 340858 events. 261941/340858 cut-off events. For 28269/28269 co-relation queries the response was YES. Maximal size of possible extension queue 8699. Compared 2223679 event pairs, 165830 based on Foata normal form. 0/246188 useless extension candidates. Maximal degree in co-relation 211472. Up to 316598 conditions per place. [2023-08-04 03:17:44,612 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 74 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 03:17:44,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 432 flow [2023-08-04 03:17:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:17:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:17:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-04 03:17:44,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964705882352941 [2023-08-04 03:17:44,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-04 03:17:44,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-04 03:17:44,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:17:44,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-04 03:17:44,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:44,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:44,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:44,619 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 250 flow. Second operand 3 states and 633 transitions. [2023-08-04 03:17:44,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 432 flow [2023-08-04 03:17:44,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:17:44,629 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 260 flow [2023-08-04 03:17:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 03:17:44,629 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-04 03:17:44,630 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 260 flow [2023-08-04 03:17:44,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:44,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:17:44,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:17:44,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:17:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:17:44,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:17:44,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:17:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash 189436443, now seen corresponding path program 1 times [2023-08-04 03:17:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:17:44,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072519321] [2023-08-04 03:17:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:17:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:17:44,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:17:44,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072519321] [2023-08-04 03:17:44,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072519321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:17:44,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495918499] [2023-08-04 03:17:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:17:44,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:17:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:17:44,905 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) [2023-08-04 03:17:44,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:17:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:17:44,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:17:44,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:17:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:17:45,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:17:45,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495918499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:17:45,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:17:45,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:17:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115403592] [2023-08-04 03:17:45,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:17:45,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:17:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:17:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:17:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:17:45,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:17:45,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:17:45,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:17:45,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:17:45,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:02,095 INFO L124 PetriNetUnfolderBase]: 232509/304402 cut-off events. [2023-08-04 03:18:02,095 INFO L125 PetriNetUnfolderBase]: For 29135/29135 co-relation queries the response was YES. [2023-08-04 03:18:03,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628835 conditions, 304402 events. 232509/304402 cut-off events. For 29135/29135 co-relation queries the response was YES. Maximal size of possible extension queue 7455. Compared 1988889 event pairs, 140331 based on Foata normal form. 0/222886 useless extension candidates. Maximal degree in co-relation 180056. Up to 244950 conditions per place. [2023-08-04 03:18:03,978 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 82 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 03:18:03,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 489 flow [2023-08-04 03:18:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 03:18:03,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 03:18:03,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 03:18:03,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 03:18:03,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:03,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 03:18:03,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:03,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:03,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:03,997 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 260 flow. Second operand 3 states and 640 transitions. [2023-08-04 03:18:03,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 489 flow [2023-08-04 03:18:04,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 487 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:04,016 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 270 flow [2023-08-04 03:18:04,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-08-04 03:18:04,016 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-04 03:18:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 270 flow [2023-08-04 03:18:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:04,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:04,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 03:18:04,220 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,SelfDestructingSolverStorable11 [2023-08-04 03:18:04,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:04,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 890034372, now seen corresponding path program 1 times [2023-08-04 03:18:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473130511] [2023-08-04 03:18:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:18:04,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473130511] [2023-08-04 03:18:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473130511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258068502] [2023-08-04 03:18:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:04,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:04,297 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) [2023-08-04 03:18:04,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:18:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:04,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:18:04,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:18:04,400 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258068502] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:04,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:18:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764779957] [2023-08-04 03:18:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:04,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:18:04,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:18:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:21,867 INFO L124 PetriNetUnfolderBase]: 215648/284953 cut-off events. [2023-08-04 03:18:21,868 INFO L125 PetriNetUnfolderBase]: For 43933/43933 co-relation queries the response was YES. [2023-08-04 03:18:22,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606565 conditions, 284953 events. 215648/284953 cut-off events. For 43933/43933 co-relation queries the response was YES. Maximal size of possible extension queue 6022. Compared 1868139 event pairs, 127560 based on Foata normal form. 0/216268 useless extension candidates. Maximal degree in co-relation 183190. Up to 214286 conditions per place. [2023-08-04 03:18:23,664 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 83 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 03:18:23,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 501 flow [2023-08-04 03:18:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 03:18:23,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 03:18:23,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 03:18:23,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 03:18:23,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:23,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 03:18:23,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:23,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:23,670 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 270 flow. Second operand 3 states and 640 transitions. [2023-08-04 03:18:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 501 flow [2023-08-04 03:18:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 499 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:24,510 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 280 flow [2023-08-04 03:18:24,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2023-08-04 03:18:24,510 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 8 predicate places. [2023-08-04 03:18:24,510 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 280 flow [2023-08-04 03:18:24,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:24,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:24,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:24,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:18:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:18:24,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:24,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1794060908, now seen corresponding path program 1 times [2023-08-04 03:18:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:24,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973037589] [2023-08-04 03:18:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:18:24,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:24,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973037589] [2023-08-04 03:18:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973037589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:24,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708900280] [2023-08-04 03:18:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:24,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:24,777 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) [2023-08-04 03:18:24,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:18:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:24,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:18:24,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:18:24,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708900280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:24,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:24,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:18:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272612356] [2023-08-04 03:18:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:24,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 425 [2023-08-04 03:18:24,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:24,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:24,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 425 [2023-08-04 03:18:24,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:41,471 INFO L124 PetriNetUnfolderBase]: 214403/284192 cut-off events. [2023-08-04 03:18:41,472 INFO L125 PetriNetUnfolderBase]: For 47501/47501 co-relation queries the response was YES. [2023-08-04 03:18:42,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614994 conditions, 284192 events. 214403/284192 cut-off events. For 47501/47501 co-relation queries the response was YES. Maximal size of possible extension queue 5838. Compared 1865385 event pairs, 145911 based on Foata normal form. 0/220042 useless extension candidates. Maximal degree in co-relation 340208. Up to 243932 conditions per place. [2023-08-04 03:18:43,000 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 84 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 03:18:43,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 100 transitions, 513 flow [2023-08-04 03:18:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-04 03:18:43,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019607843137255 [2023-08-04 03:18:43,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-04 03:18:43,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-04 03:18:43,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:43,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-04 03:18:43,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:43,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:43,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:43,005 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 280 flow. Second operand 3 states and 640 transitions. [2023-08-04 03:18:43,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 100 transitions, 513 flow [2023-08-04 03:18:52,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:52,456 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 290 flow [2023-08-04 03:18:52,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-04 03:18:52,457 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-04 03:18:52,457 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 290 flow [2023-08-04 03:18:52,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:52,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:52,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:52,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 03:18:52,659 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,SelfDestructingSolverStorable13 [2023-08-04 03:18:52,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:52,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 190287440, now seen corresponding path program 1 times [2023-08-04 03:18:52,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:52,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996764970] [2023-08-04 03:18:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:52,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:18:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996764970] [2023-08-04 03:18:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996764970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48937461] [2023-08-04 03:18:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:52,749 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) [2023-08-04 03:18:52,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 03:18:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:52,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:18:52,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:18:52,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:18:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48937461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:52,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:18:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406941318] [2023-08-04 03:18:52,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:52,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:52,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 425 [2023-08-04 03:18:52,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 290 flow. Second operand has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:52,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:52,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 425 [2023-08-04 03:18:52,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand