/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:20:18,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:20:18,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:20:18,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:20:18,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:20:18,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:20:18,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:20:18,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:20:18,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:20:18,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:20:18,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:20:18,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:20:18,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:20:18,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:20:18,802 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:20:18,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:20:18,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:20:18,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:20:18,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:20:18,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:20:18,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:20:18,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:20:18,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:20:18,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:20:18,806 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:20:18,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:20:18,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:20:18,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:20:18,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:20:18,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:20:18,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:20:18,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:20:18,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:20:18,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:20:18,810 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:20:18,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:20:19,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:20:19,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:20:19,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:20:19,069 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:20:19,070 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:20:19,071 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 07:20:20,195 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:20:20,461 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:20:20,461 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 07:20:20,480 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913a36d1b/0b3dd052b75d498494f7607c842bd7fa/FLAG15cd0591d [2023-08-04 07:20:20,498 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/913a36d1b/0b3dd052b75d498494f7607c842bd7fa [2023-08-04 07:20:20,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:20:20,504 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:20:20,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:20:20,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:20:20,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:20:20,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:20:20" (1/1) ... [2023-08-04 07:20:20,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3802b448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:20, skipping insertion in model container [2023-08-04 07:20:20,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:20:20" (1/1) ... [2023-08-04 07:20:20,567 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:20:20,685 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i[995,1008] [2023-08-04 07:20:20,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:20:20,922 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:20:20,935 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.oepc_bound2.i[995,1008] [2023-08-04 07:20:20,942 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:20:20,954 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:20:21,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:20:21,023 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:20:21,023 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:20:21,029 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:20:21,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21 WrapperNode [2023-08-04 07:20:21,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:20:21,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:20:21,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:20:21,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:20:21,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,079 INFO L138 Inliner]: procedures = 177, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 185 [2023-08-04 07:20:21,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:20:21,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:20:21,080 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:20:21,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:20:21,089 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:20:21,120 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:20:21,120 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:20:21,120 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:20:21,121 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (1/1) ... [2023-08-04 07:20:21,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:20:21,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:20:21,186 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 07:20:21,211 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 07:20:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:20:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:20:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:20:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:20:21,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:20:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:20:21,226 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:20:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:20:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:20:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:20:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:20:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:20:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:20:21,227 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:20:21,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:20:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:20:21,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:20:21,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:20:21,230 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 07:20:21,463 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:20:21,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:20:21,921 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:20:22,150 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:20:22,151 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:20:22,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:20:22 BoogieIcfgContainer [2023-08-04 07:20:22,154 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:20:22,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:20:22,157 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:20:22,160 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:20:22,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:20:20" (1/3) ... [2023-08-04 07:20:22,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f112d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:20:22, skipping insertion in model container [2023-08-04 07:20:22,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:20:21" (2/3) ... [2023-08-04 07:20:22,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f112d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:20:22, skipping insertion in model container [2023-08-04 07:20:22,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:20:22" (3/3) ... [2023-08-04 07:20:22,163 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe027_power.oepc_bound2.i [2023-08-04 07:20:22,170 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:20:22,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:20:22,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:20:22,180 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:20:22,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:20:22,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:20:22,503 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 07:20:22,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:22,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 926 events. 62/926 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5503 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 563. Up to 32 conditions per place. [2023-08-04 07:20:22,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:20:22,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 153 transitions, 318 flow [2023-08-04 07:20:22,525 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:20:22,539 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:20:22,542 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:20:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 153 transitions, 318 flow [2023-08-04 07:20:22,648 INFO L124 PetriNetUnfolderBase]: 46/687 cut-off events. [2023-08-04 07:20:22,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:22,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 687 events. 46/687 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3629 event pairs, 0 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 437. Up to 32 conditions per place. [2023-08-04 07:20:22,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 07:20:30,183 INFO L134 LiptonReduction]: Checked pairs total: 5314 [2023-08-04 07:20:30,184 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 07:20:30,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:20:30,202 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;@7e80f9b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:20:30,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:20:30,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:20:30,211 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2023-08-04 07:20:30,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:30,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:30,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:30,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:30,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1947775824, now seen corresponding path program 1 times [2023-08-04 07:20:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:30,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647444863] [2023-08-04 07:20:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:30,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:30,531 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 07:20:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647444863] [2023-08-04 07:20:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647444863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:20:30,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:20:30,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:20:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916813947] [2023-08-04 07:20:30,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:20:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:20:30,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:20:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:20:30,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:20:30,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 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 07:20:30,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:30,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:20:30,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:31,847 INFO L124 PetriNetUnfolderBase]: 4280/6233 cut-off events. [2023-08-04 07:20:31,847 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 07:20:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12623 conditions, 6233 events. 4280/6233 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 32061 event pairs, 3630 based on Foata normal form. 0/5858 useless extension candidates. Maximal degree in co-relation 12609. Up to 6228 conditions per place. [2023-08-04 07:20:31,883 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 29 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:20:31,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 142 flow [2023-08-04 07:20:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:20:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:20:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-04 07:20:31,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-08-04 07:20:31,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-04 07:20:31,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-04 07:20:31,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:31,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-04 07:20:31,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 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 07:20:31,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:31,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:31,917 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 72 flow. Second operand 3 states and 486 transitions. [2023-08-04 07:20:31,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 142 flow [2023-08-04 07:20:31,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:20:31,921 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 80 flow [2023-08-04 07:20:31,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-04 07:20:31,926 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 07:20:31,926 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 80 flow [2023-08-04 07:20:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 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 07:20:31,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:31,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:20:31,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:31,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 91672918, now seen corresponding path program 1 times [2023-08-04 07:20:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:31,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321486717] [2023-08-04 07:20:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:31,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:32,033 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 07:20:32,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321486717] [2023-08-04 07:20:32,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321486717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:20:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354621] [2023-08-04 07:20:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:32,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:20:32,037 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 07:20:32,051 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 07:20:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:32,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:20:32,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:20:32,209 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 07:20:32,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:20:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:20:32,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:20:32,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:20:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248993773] [2023-08-04 07:20:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:20:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:20:32,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:20:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:20:32,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:20:32,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 07:20:32,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:32,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:20:32,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:33,051 INFO L124 PetriNetUnfolderBase]: 3458/4934 cut-off events. [2023-08-04 07:20:33,051 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-04 07:20:33,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10001 conditions, 4934 events. 3458/4934 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23328 event pairs, 2482 based on Foata normal form. 0/4654 useless extension candidates. Maximal degree in co-relation 9984. Up to 4909 conditions per place. [2023-08-04 07:20:33,075 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 31 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:20:33,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 158 flow [2023-08-04 07:20:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:20:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:20:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-04 07:20:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2023-08-04 07:20:33,078 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-04 07:20:33,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-04 07:20:33,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:33,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-04 07:20:33,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 07:20:33,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:33,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:33,082 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 80 flow. Second operand 3 states and 488 transitions. [2023-08-04 07:20:33,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 158 flow [2023-08-04 07:20:33,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:20:33,084 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 84 flow [2023-08-04 07:20:33,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-08-04 07:20:33,085 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-04 07:20:33,085 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 84 flow [2023-08-04 07:20:33,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 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 07:20:33,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:33,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:33,095 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 07:20:33,297 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 07:20:33,300 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:33,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash -992487582, now seen corresponding path program 1 times [2023-08-04 07:20:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:33,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281411506] [2023-08-04 07:20:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:33,374 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 07:20:33,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281411506] [2023-08-04 07:20:33,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281411506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:20:33,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558353029] [2023-08-04 07:20:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:33,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:20:33,376 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 07:20:33,404 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 07:20:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:33,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:20:33,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:20:33,545 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 07:20:33,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:20:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558353029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:20:33,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:20:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:20:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093379492] [2023-08-04 07:20:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:20:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:20:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:20:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:20:33,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:20:33,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 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 07:20:33,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:33,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:20:33,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:34,325 INFO L124 PetriNetUnfolderBase]: 2975/4190 cut-off events. [2023-08-04 07:20:34,325 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 07:20:34,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8522 conditions, 4190 events. 2975/4190 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18841 event pairs, 2066 based on Foata normal form. 0/3973 useless extension candidates. Maximal degree in co-relation 8505. Up to 4064 conditions per place. [2023-08-04 07:20:34,343 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 34 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-04 07:20:34,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 174 flow [2023-08-04 07:20:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:20:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:20:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-04 07:20:34,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5455555555555556 [2023-08-04 07:20:34,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-04 07:20:34,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-04 07:20:34,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:34,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-04 07:20:34,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 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 07:20:34,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:34,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:34,350 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 84 flow. Second operand 3 states and 491 transitions. [2023-08-04 07:20:34,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 174 flow [2023-08-04 07:20:34,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:20:34,352 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 88 flow [2023-08-04 07:20:34,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-08-04 07:20:34,353 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-08-04 07:20:34,353 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 88 flow [2023-08-04 07:20:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 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 07:20:34,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:34,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:34,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:20:34,559 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,SelfDestructingSolverStorable2 [2023-08-04 07:20:34,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:34,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1674471785, now seen corresponding path program 1 times [2023-08-04 07:20:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:34,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858730071] [2023-08-04 07:20:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:34,655 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 07:20:34,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:34,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858730071] [2023-08-04 07:20:34,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858730071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:20:34,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743717180] [2023-08-04 07:20:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:34,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:20:34,657 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 07:20:34,660 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 07:20:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:34,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:20:34,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:20:34,798 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 07:20:34,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:20:34,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743717180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:20:34,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:20:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:20:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695769746] [2023-08-04 07:20:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:20:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:20:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:20:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:20:34,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:20:34,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 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 07:20:34,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:34,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:20:34,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:35,397 INFO L124 PetriNetUnfolderBase]: 2750/3857 cut-off events. [2023-08-04 07:20:35,397 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-04 07:20:35,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 3857 events. 2750/3857 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17373 event pairs, 1760 based on Foata normal form. 0/3712 useless extension candidates. Maximal degree in co-relation 7944. Up to 3191 conditions per place. [2023-08-04 07:20:35,414 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 37 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 07:20:35,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 190 flow [2023-08-04 07:20:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:20:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:20:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-04 07:20:35,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488888888888889 [2023-08-04 07:20:35,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-04 07:20:35,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-04 07:20:35,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:35,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-04 07:20:35,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 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 07:20:35,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:35,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 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 07:20:35,421 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 88 flow. Second operand 3 states and 494 transitions. [2023-08-04 07:20:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 190 flow [2023-08-04 07:20:35,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:20:35,423 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 92 flow [2023-08-04 07:20:35,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-04 07:20:35,424 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 07:20:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 92 flow [2023-08-04 07:20:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 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 07:20:35,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:35,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:35,430 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 07:20:35,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:35,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:35,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:35,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1813026391, now seen corresponding path program 1 times [2023-08-04 07:20:35,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:35,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407961073] [2023-08-04 07:20:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:35,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:35,690 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 07:20:35,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407961073] [2023-08-04 07:20:35,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407961073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:20:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659409166] [2023-08-04 07:20:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:35,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:20:35,692 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 07:20:35,694 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 07:20:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:35,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:20:35,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:20:35,866 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 07:20:35,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:20:35,889 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 07:20:35,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659409166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:20:35,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:20:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:20:35,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735167310] [2023-08-04 07:20:35,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:20:35,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:20:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:20:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:20:35,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 300 [2023-08-04 07:20:35,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 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 07:20:35,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:35,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 300 [2023-08-04 07:20:35,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:35,935 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:20:35,935 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:20:35,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:20:35,935 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:20:35,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:20:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:20:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:20:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 07:20:35,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-08-04 07:20:35,938 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 07:20:35,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 07:20:35,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:35,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 07:20:35,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 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 07:20:35,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 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 07:20:35,942 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 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 07:20:35,943 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 92 flow. Second operand 4 states and 610 transitions. [2023-08-04 07:20:35,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:20:35,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:20:35,943 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:20:35,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 07:20:35,946 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -19 predicate places. [2023-08-04 07:20:35,946 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:20:35,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 0 states have call successors, (0), 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 07:20:35,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:20:35,959 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 07:20:36,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:20:36,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:20:36,157 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:20:36,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:20:36,239 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 07:20:36,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:36,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 926 events. 62/926 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5503 event pairs, 0 based on Foata normal form. 0/818 useless extension candidates. Maximal degree in co-relation 563. Up to 32 conditions per place. [2023-08-04 07:20:36,241 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:20:36,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 140 transitions, 300 flow [2023-08-04 07:20:36,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:20:36,244 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:20:36,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:20:36,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 140 transitions, 300 flow [2023-08-04 07:20:36,275 INFO L124 PetriNetUnfolderBase]: 14/430 cut-off events. [2023-08-04 07:20:36,276 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:36,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 430 events. 14/430 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1803 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-08-04 07:20:36,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 1876 [2023-08-04 07:20:42,203 INFO L134 LiptonReduction]: Checked pairs total: 4374 [2023-08-04 07:20:42,203 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 07:20:42,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:20:42,205 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;@7e80f9b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:20:42,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:20:42,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:20:42,209 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 07:20:42,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:20:42,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:42,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:20:42,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:20:42,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 990452975, now seen corresponding path program 1 times [2023-08-04 07:20:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:42,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322110731] [2023-08-04 07:20:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:20:42,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:20:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:20:42,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:20:42,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:20:42,270 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:20:42,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:20:42,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:20:42,271 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:20:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:20:42,271 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:20:42,272 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:20:42,273 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:20:42,273 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:20:42,323 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:20:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:20:42,776 INFO L124 PetriNetUnfolderBase]: 282/4202 cut-off events. [2023-08-04 07:20:42,776 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:20:42,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4491 conditions, 4202 events. 282/4202 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40066 event pairs, 0 based on Foata normal form. 0/3719 useless extension candidates. Maximal degree in co-relation 3051. Up to 162 conditions per place. [2023-08-04 07:20:42,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:20:42,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 180 transitions, 392 flow [2023-08-04 07:20:42,799 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:20:42,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:20:42,799 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:20:42,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 180 transitions, 392 flow [2023-08-04 07:20:43,094 INFO L124 PetriNetUnfolderBase]: 201/3028 cut-off events. [2023-08-04 07:20:43,094 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:20:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 3028 events. 201/3028 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 26539 event pairs, 0 based on Foata normal form. 0/2707 useless extension candidates. Maximal degree in co-relation 2256. Up to 162 conditions per place. [2023-08-04 07:20:43,139 INFO L119 LiptonReduction]: Number of co-enabled transitions 6328 [2023-08-04 07:20:51,183 INFO L134 LiptonReduction]: Checked pairs total: 15808 [2023-08-04 07:20:51,183 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-04 07:20:51,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:20:51,186 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;@7e80f9b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:20:51,186 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:20:51,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:20:51,190 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2023-08-04 07:20:51,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:20:51,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:20:51,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:20:51,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:20:51,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:20:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2033760786, now seen corresponding path program 1 times [2023-08-04 07:20:51,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:20:51,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611817598] [2023-08-04 07:20:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:20:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:20:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:20:51,241 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 07:20:51,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:20:51,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611817598] [2023-08-04 07:20:51,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611817598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:20:51,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:20:51,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:20:51,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077207460] [2023-08-04 07:20:51,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:20:51,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:20:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:20:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:20:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:20:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 335 [2023-08-04 07:20:51,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 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 07:20:51,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:20:51,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 335 [2023-08-04 07:20:51,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand