/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_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:21:54,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:21:54,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:21:54,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:21:54,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:21:54,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:21:54,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:21:54,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:21:54,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:21:54,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:21:54,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:21:54,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:21:54,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:21:54,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:21:54,785 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:21:54,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:21:54,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:21:54,786 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:21:54,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:21:54,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:21:54,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:21:54,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:21:54,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:21:54,787 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:21:54,787 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:21:54,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:21:54,788 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:21:54,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:21:54,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:21:54,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:21:54,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:21:54,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:21:54,791 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:21:54,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:21:54,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:21:54,791 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:21:54,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:21:55,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:21:55,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:21:55,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:21:55,029 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:21:55,029 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:21:55,031 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_rmo_bound2.i [2023-08-04 07:21:56,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:21:56,512 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:21:56,512 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_rmo_bound2.i [2023-08-04 07:21:56,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f8ff1a2/aa4acd5abb9c497695c0e29441620395/FLAGe70996c12 [2023-08-04 07:21:56,538 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f8ff1a2/aa4acd5abb9c497695c0e29441620395 [2023-08-04 07:21:56,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:21:56,542 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:21:56,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:21:56,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:21:56,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:21:56,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:21:56" (1/1) ... [2023-08-04 07:21:56,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b55cd86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:56, skipping insertion in model container [2023-08-04 07:21:56,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:21:56" (1/1) ... [2023-08-04 07:21:56,613 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:21:56,742 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_rmo_bound2.i[988,1001] [2023-08-04 07:21:56,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:21:56,899 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:21:56,913 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_rmo_bound2.i[988,1001] [2023-08-04 07:21:56,933 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:21:56,935 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:21:57,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:21:57,048 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:21:57,049 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:21:57,055 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:21:57,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57 WrapperNode [2023-08-04 07:21:57,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:21:57,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:21:57,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:21:57,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:21:57,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,129 INFO L138 Inliner]: procedures = 177, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 185 [2023-08-04 07:21:57,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:21:57,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:21:57,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:21:57,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:21:57,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,142 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,160 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,184 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,188 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:21:57,189 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:21:57,189 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:21:57,189 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:21:57,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (1/1) ... [2023-08-04 07:21:57,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:21:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:21:57,236 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 07:21:57,260 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 07:21:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:21:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:21:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:21:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:21:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:21:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:21:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:21:57,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:21:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:21:57,278 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:21:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:21:57,278 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:21:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:21:57,278 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:21:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:21:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:21:57,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:21:57,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:21:57,280 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 07:21:57,445 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:21:57,447 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:21:57,875 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:21:58,068 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:21:58,068 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:21:58,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:21:58 BoogieIcfgContainer [2023-08-04 07:21:58,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:21:58,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:21:58,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:21:58,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:21:58,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:21:56" (1/3) ... [2023-08-04 07:21:58,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:21:58, skipping insertion in model container [2023-08-04 07:21:58,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:57" (2/3) ... [2023-08-04 07:21:58,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e4eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:21:58, skipping insertion in model container [2023-08-04 07:21:58,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:21:58" (3/3) ... [2023-08-04 07:21:58,080 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe027_rmo_bound2.i [2023-08-04 07:21:58,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:21:58,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:21:58,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:21:58,096 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:21:58,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:21:58,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:21:58,425 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 07:21:58,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:58,435 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 5513 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 07:21:58,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:21:58,444 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 153 transitions, 318 flow [2023-08-04 07:21:58,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:21:58,455 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:21:58,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 153 transitions, 318 flow [2023-08-04 07:21:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 153 transitions, 318 flow [2023-08-04 07:21:58,568 INFO L124 PetriNetUnfolderBase]: 46/687 cut-off events. [2023-08-04 07:21:58,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:58,572 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 3654 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 07:21:58,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 07:22:04,506 INFO L134 LiptonReduction]: Checked pairs total: 5667 [2023-08-04 07:22:04,507 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 07:22:04,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:22:04,524 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;@5bb70199, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:04,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:22:04,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:04,531 INFO L124 PetriNetUnfolderBase]: 2/47 cut-off events. [2023-08-04 07:22:04,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:04,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:04,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:04,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:04,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash 188847134, now seen corresponding path program 1 times [2023-08-04 07:22:04,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:04,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578820537] [2023-08-04 07:22:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:04,824 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 07:22:04,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:04,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578820537] [2023-08-04 07:22:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578820537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:04,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:22:04,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:22:04,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456630732] [2023-08-04 07:22:04,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:04,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:22:04,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:22:04,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 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 07:22:04,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:04,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:22:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:06,157 INFO L124 PetriNetUnfolderBase]: 5700/8253 cut-off events. [2023-08-04 07:22:06,157 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 07:22:06,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16663 conditions, 8253 events. 5700/8253 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43787 event pairs, 4850 based on Foata normal form. 300/7878 useless extension candidates. Maximal degree in co-relation 16649. Up to 8248 conditions per place. [2023-08-04 07:22:06,202 INFO L140 encePairwiseOnDemand]: 296/300 looper letters, 30 selfloop transitions, 2 changer transitions 2/35 dead transitions. [2023-08-04 07:22:06,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 150 flow [2023-08-04 07:22:06,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:22:06,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2023-08-04 07:22:06,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:22:06,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:22:06,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:06,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:22:06,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 07:22:06,238 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 07:22:06,239 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 07:22:06,245 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 78 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:22:06,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 150 flow [2023-08-04 07:22:06,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:22:06,255 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 82 flow [2023-08-04 07:22:06,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2023-08-04 07:22:06,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-04 07:22:06,260 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 82 flow [2023-08-04 07:22:06,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 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 07:22:06,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:06,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:06,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:22:06,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:06,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:06,263 INFO L85 PathProgramCache]: Analyzing trace with hash 877676543, now seen corresponding path program 1 times [2023-08-04 07:22:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827261944] [2023-08-04 07:22:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:06,378 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 07:22:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:06,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827261944] [2023-08-04 07:22:06,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827261944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:22:06,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684962688] [2023-08-04 07:22:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:06,382 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 07:22:06,390 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 07:22:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:06,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:22:06,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:22:06,556 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 07:22:06,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:22:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684962688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:22:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:22:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814511285] [2023-08-04 07:22:06,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:22:06,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:22:06,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:22:06,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:06,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:22:06,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:07,303 INFO L124 PetriNetUnfolderBase]: 4028/5729 cut-off events. [2023-08-04 07:22:07,303 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-04 07:22:07,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11591 conditions, 5729 events. 4028/5729 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27531 event pairs, 2902 based on Foata normal form. 0/5449 useless extension candidates. Maximal degree in co-relation 11574. Up to 5704 conditions per place. [2023-08-04 07:22:07,338 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 32 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-04 07:22:07,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 162 flow [2023-08-04 07:22:07,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:22:07,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2023-08-04 07:22:07,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:22:07,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:22:07,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:07,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:22:07,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 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 07:22:07,345 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 07:22:07,345 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 07:22:07,346 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 82 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:22:07,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 162 flow [2023-08-04 07:22:07,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:22:07,347 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 86 flow [2023-08-04 07:22:07,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2023-08-04 07:22:07,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-04 07:22:07,348 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 86 flow [2023-08-04 07:22:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:22:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:07,360 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 07:22:07,554 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 07:22:07,555 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:07,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -446907524, now seen corresponding path program 1 times [2023-08-04 07:22:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696899249] [2023-08-04 07:22:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:07,681 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 07:22:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696899249] [2023-08-04 07:22:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696899249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:22:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657463319] [2023-08-04 07:22:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:07,684 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 07:22:07,686 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 07:22:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:07,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:22:07,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:22:07,811 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 07:22:07,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:22:07,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657463319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:07,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:22:07,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:22:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468535996] [2023-08-04 07:22:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:22:07,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:22:07,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 07:22:07,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:07,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:22:07,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:08,523 INFO L124 PetriNetUnfolderBase]: 3458/4855 cut-off events. [2023-08-04 07:22:08,524 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:22:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9850 conditions, 4855 events. 3458/4855 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22171 event pairs, 2414 based on Foata normal form. 0/4638 useless extension candidates. Maximal degree in co-relation 9833. Up to 4727 conditions per place. [2023-08-04 07:22:08,560 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 35 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-08-04 07:22:08,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 178 flow [2023-08-04 07:22:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-04 07:22:08,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2023-08-04 07:22:08,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-04 07:22:08,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-04 07:22:08,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:08,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-04 07:22:08,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 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 07:22:08,566 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 07:22:08,566 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 07:22:08,566 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 86 flow. Second operand 3 states and 492 transitions. [2023-08-04 07:22:08,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 178 flow [2023-08-04 07:22:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:22:08,568 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 90 flow [2023-08-04 07:22:08,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-04 07:22:08,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-04 07:22:08,569 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 90 flow [2023-08-04 07:22:08,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 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 07:22:08,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:08,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:08,581 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 07:22:08,775 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 07:22:08,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:08,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1177613161, now seen corresponding path program 1 times [2023-08-04 07:22:08,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:08,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644186266] [2023-08-04 07:22:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:08,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:08,871 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 07:22:08,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:08,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644186266] [2023-08-04 07:22:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644186266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:22:08,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127751770] [2023-08-04 07:22:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:08,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:08,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:08,874 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 07:22:08,876 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 07:22:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:08,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:22:08,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:22:09,010 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 07:22:09,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:22:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127751770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:09,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:22:09,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:22:09,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586499299] [2023-08-04 07:22:09,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:09,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:09,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:09,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:22:09,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 300 [2023-08-04 07:22:09,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 07:22:09,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:09,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 300 [2023-08-04 07:22:09,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:09,558 INFO L124 PetriNetUnfolderBase]: 3158/4411 cut-off events. [2023-08-04 07:22:09,558 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2023-08-04 07:22:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9068 conditions, 4411 events. 3158/4411 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19863 event pairs, 2060 based on Foata normal form. 0/4266 useless extension candidates. Maximal degree in co-relation 9050. Up to 3743 conditions per place. [2023-08-04 07:22:09,581 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 38 selfloop transitions, 2 changer transitions 1/42 dead transitions. [2023-08-04 07:22:09,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 194 flow [2023-08-04 07:22:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 07:22:09,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-04 07:22:09,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 07:22:09,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 07:22:09,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:09,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 07:22:09,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 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 07:22:09,586 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 07:22:09,587 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 07:22:09,587 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 90 flow. Second operand 3 states and 495 transitions. [2023-08-04 07:22:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 194 flow [2023-08-04 07:22:09,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:22:09,589 INFO L231 Difference]: Finished difference. Result has 46 places, 31 transitions, 94 flow [2023-08-04 07:22:09,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=31} [2023-08-04 07:22:09,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-08-04 07:22:09,590 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 31 transitions, 94 flow [2023-08-04 07:22:09,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 07:22:09,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:09,590 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 07:22:09,600 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 07:22:09,798 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 07:22:09,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:09,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1071484847, now seen corresponding path program 1 times [2023-08-04 07:22:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:09,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129904253] [2023-08-04 07:22:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:09,898 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 07:22:09,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:09,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129904253] [2023-08-04 07:22:09,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129904253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:22:09,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862632934] [2023-08-04 07:22:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:09,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:09,900 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 07:22:09,903 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 07:22:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:10,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:22:10,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:22:10,062 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 07:22:10,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:22:10,084 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 07:22:10,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862632934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:22:10,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:22:10,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:22:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401480084] [2023-08-04 07:22:10,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:22:10,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:22:10,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:22:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:22:10,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 300 [2023-08-04 07:22:10,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 31 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 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 07:22:10,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:10,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 300 [2023-08-04 07:22:10,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:10,125 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:22:10,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:10,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 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 07:22:10,126 INFO L140 encePairwiseOnDemand]: 297/300 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:22:10,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:22:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:22:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:22:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 07:22:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2023-08-04 07:22:10,128 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 07:22:10,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 07:22:10,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:10,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 07:22:10,130 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 07:22:10,132 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 07:22:10,132 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 07:22:10,132 INFO L175 Difference]: Start difference. First operand has 46 places, 31 transitions, 94 flow. Second operand 4 states and 610 transitions. [2023-08-04 07:22:10,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:22:10,133 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 07:22:10,133 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:22:10,133 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 07:22:10,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -21 predicate places. [2023-08-04 07:22:10,134 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:22:10,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 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 07:22:10,137 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:22:10,148 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 07:22:10,343 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 07:22:10,343 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:22:10,345 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:22:10,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:22:10,427 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 07:22:10,427 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:10,429 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 5513 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 07:22:10,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 171 transitions, 362 flow [2023-08-04 07:22:10,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 140 transitions, 300 flow [2023-08-04 07:22:10,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:22:10,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:22:10,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 140 transitions, 300 flow [2023-08-04 07:22:10,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 140 transitions, 300 flow [2023-08-04 07:22:10,466 INFO L124 PetriNetUnfolderBase]: 14/430 cut-off events. [2023-08-04 07:22:10,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:10,467 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 1804 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 07:22:10,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 1876 [2023-08-04 07:22:15,379 INFO L134 LiptonReduction]: Checked pairs total: 3846 [2023-08-04 07:22:15,379 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 07:22:15,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:22:15,381 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;@5bb70199, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:15,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:22:15,385 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:15,385 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:22:15,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:15,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:15,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:22:15,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:22:15,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1492767887, now seen corresponding path program 1 times [2023-08-04 07:22:15,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220714060] [2023-08-04 07:22:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:22:15,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:22:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:22:15,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:22:15,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:22:15,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:22:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:22:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:22:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:22:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:22:15,457 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:22:15,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:22:15,459 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:22:15,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:22:15,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:22:15,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:22:15,992 INFO L124 PetriNetUnfolderBase]: 282/4202 cut-off events. [2023-08-04 07:22:15,992 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:22:16,015 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 39818 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 07:22:16,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 198 transitions, 444 flow [2023-08-04 07:22:16,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 180 transitions, 392 flow [2023-08-04 07:22:16,023 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:22:16,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:22:16,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 180 transitions, 392 flow [2023-08-04 07:22:16,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 180 transitions, 392 flow [2023-08-04 07:22:16,311 INFO L124 PetriNetUnfolderBase]: 201/3028 cut-off events. [2023-08-04 07:22:16,311 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:22:16,327 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 26472 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 07:22:16,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 6328 [2023-08-04 07:22:22,959 INFO L134 LiptonReduction]: Checked pairs total: 15618 [2023-08-04 07:22:22,959 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-04 07:22:22,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:22:22,962 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;@5bb70199, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:22,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:22:22,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:22,966 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 07:22:22,966 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:22:22,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:22,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:22,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:22,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash -844587500, now seen corresponding path program 1 times [2023-08-04 07:22:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:22,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534509663] [2023-08-04 07:22:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:23,031 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 07:22:23,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:23,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534509663] [2023-08-04 07:22:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534509663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:23,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:22:23,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:22:23,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356507974] [2023-08-04 07:22:23,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:23,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:23,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:22:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 336 [2023-08-04 07:22:23,043 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 07:22:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 336 [2023-08-04 07:22:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand