/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:46:25,891 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:46:25,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:46:25,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:46:25,937 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:46:25,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:46:25,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:46:25,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:46:25,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:46:25,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:46:25,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:46:25,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:46:25,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:46:25,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:46:25,954 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:46:25,954 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:46:25,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:46:25,955 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:46:25,955 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:46:25,955 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:46:25,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:46:25,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:46:25,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:46:25,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:46:25,957 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:46:25,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:46:25,957 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:46:25,957 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:46:25,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:46:25,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:46:25,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:46:25,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:46:25,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:46:25,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:46:25,959 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:46:25,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:46:25,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:46:25,960 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:46:25,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:46:25,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:46:25,960 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:46:25,961 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:46:26,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:46:26,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:46:26,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:46:26,186 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:46:26,188 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:46:26,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 02:46:27,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:46:27,342 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:46:27,343 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 02:46:27,348 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c57f1b/4f835620831e4e42b6e071a008495bde/FLAG545e0798a [2023-08-04 02:46:27,361 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c57f1b/4f835620831e4e42b6e071a008495bde [2023-08-04 02:46:27,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:46:27,364 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:46:27,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:46:27,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:46:27,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:46:27,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e093965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27, skipping insertion in model container [2023-08-04 02:46:27,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,385 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:46:27,524 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-04 02:46:27,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:46:27,535 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:46:27,554 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-counter-queue.wvr_bound2.c[2590,2603] [2023-08-04 02:46:27,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:46:27,565 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:46:27,565 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:46:27,569 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:46:27,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27 WrapperNode [2023-08-04 02:46:27,570 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:46:27,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:46:27,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:46:27,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:46:27,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,595 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 178 [2023-08-04 02:46:27,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:46:27,596 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:46:27,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:46:27,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:46:27,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,605 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,619 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,621 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:46:27,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:46:27,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:46:27,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:46:27,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (1/1) ... [2023-08-04 02:46:27,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:46:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:27,655 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 02:46:27,657 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 02:46:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:46:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:46:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:46:27,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:46:27,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:46:27,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:46:27,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:46:27,683 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 02:46:27,753 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:46:27,755 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:46:28,000 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:46:28,096 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:46:28,096 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 02:46:28,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:46:28 BoogieIcfgContainer [2023-08-04 02:46:28,098 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:46:28,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:46:28,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:46:28,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:46:28,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:46:27" (1/3) ... [2023-08-04 02:46:28,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb00245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:46:28, skipping insertion in model container [2023-08-04 02:46:28,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:46:27" (2/3) ... [2023-08-04 02:46:28,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb00245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:46:28, skipping insertion in model container [2023-08-04 02:46:28,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:46:28" (3/3) ... [2023-08-04 02:46:28,104 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-counter-queue.wvr_bound2.c [2023-08-04 02:46:28,109 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:46:28,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:46:28,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:46:28,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:46:28,156 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:46:28,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,284 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 02:46:28,285 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:46:28,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 02:46:28,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,297 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:46:28,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 141 transitions, 304 flow [2023-08-04 02:46:28,345 INFO L124 PetriNetUnfolderBase]: 36/282 cut-off events. [2023-08-04 02:46:28,345 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:46:28,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 282 events. 36/282 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 905 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-08-04 02:46:28,354 INFO L119 LiptonReduction]: Number of co-enabled transitions 2662 [2023-08-04 02:46:31,513 INFO L134 LiptonReduction]: Checked pairs total: 4239 [2023-08-04 02:46:31,514 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 02:46:31,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:46:31,539 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;@73fbb81e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:46:31,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:46:31,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:46:31,547 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2023-08-04 02:46:31,548 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:46:31,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:31,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:46:31,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:46:31,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:31,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1264758270, now seen corresponding path program 1 times [2023-08-04 02:46:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:31,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552752422] [2023-08-04 02:46:31,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:31,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:46:31,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:46:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:46:31,676 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:46:31,677 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:46:31,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:46:31,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:46:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:46:31,679 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:46:31,681 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:46:31,682 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:46:31,682 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:46:31,716 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:46:31,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,796 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 02:46:31,796 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:46:31,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 02:46:31,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,803 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:46:31,804 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,804 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:31,896 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 02:46:31,897 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:46:31,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 02:46:31,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 02:46:35,051 INFO L134 LiptonReduction]: Checked pairs total: 12504 [2023-08-04 02:46:35,051 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-04 02:46:35,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:46:35,053 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;@73fbb81e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:46:35,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:46:35,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:46:35,060 INFO L124 PetriNetUnfolderBase]: 8/74 cut-off events. [2023-08-04 02:46:35,060 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:46:35,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:35,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:46:35,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:46:35,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash 449464461, now seen corresponding path program 1 times [2023-08-04 02:46:35,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:35,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43052077] [2023-08-04 02:46:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:35,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:46:35,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43052077] [2023-08-04 02:46:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43052077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781720812] [2023-08-04 02:46:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:35,228 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 02:46:35,229 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 02:46:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:35,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:46:35,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:46:35,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:46:35,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781720812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:35,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:46:35,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:46:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723888261] [2023-08-04 02:46:35,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:35,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:46:35,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-04 02:46:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:46:35,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-04 02:46:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:37,211 INFO L124 PetriNetUnfolderBase]: 20686/26704 cut-off events. [2023-08-04 02:46:37,211 INFO L125 PetriNetUnfolderBase]: For 2181/2181 co-relation queries the response was YES. [2023-08-04 02:46:37,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53966 conditions, 26704 events. 20686/26704 cut-off events. For 2181/2181 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 134371 event pairs, 6519 based on Foata normal form. 0/16885 useless extension candidates. Maximal degree in co-relation 19986. Up to 25744 conditions per place. [2023-08-04 02:46:37,280 INFO L140 encePairwiseOnDemand]: 306/311 looper letters, 32 selfloop transitions, 5 changer transitions 17/61 dead transitions. [2023-08-04 02:46:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 270 flow [2023-08-04 02:46:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:46:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:46:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-04 02:46:37,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46881028938906755 [2023-08-04 02:46:37,291 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-04 02:46:37,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-04 02:46:37,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:37,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-04 02:46:37,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 02:46:37,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 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 02:46:37,302 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 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 02:46:37,303 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 148 flow. Second operand 5 states and 729 transitions. [2023-08-04 02:46:37,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 270 flow [2023-08-04 02:46:37,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:46:37,310 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 103 flow [2023-08-04 02:46:37,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-04 02:46:37,314 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 02:46:37,314 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 103 flow [2023-08-04 02:46:37,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:46:37,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:37,315 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:37,345 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 02:46:37,520 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 02:46:37,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:46:37,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1489642096, now seen corresponding path program 1 times [2023-08-04 02:46:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:37,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362062138] [2023-08-04 02:46:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:37,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362062138] [2023-08-04 02:46:37,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362062138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:37,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:46:37,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:46:37,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731272513] [2023-08-04 02:46:37,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:37,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:37,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:46:37,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 311 [2023-08-04 02:46:37,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 02:46:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 311 [2023-08-04 02:46:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:37,955 INFO L124 PetriNetUnfolderBase]: 4756/6223 cut-off events. [2023-08-04 02:46:37,955 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2023-08-04 02:46:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12665 conditions, 6223 events. 4756/6223 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26215 event pairs, 2151 based on Foata normal form. 1/4214 useless extension candidates. Maximal degree in co-relation 5523. Up to 5938 conditions per place. [2023-08-04 02:46:37,986 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-04 02:46:37,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 168 flow [2023-08-04 02:46:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-04 02:46:37,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4694533762057878 [2023-08-04 02:46:37,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-04 02:46:37,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-04 02:46:37,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:37,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-04 02:46:37,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 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 02:46:37,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 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 02:46:37,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 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 02:46:37,992 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 103 flow. Second operand 3 states and 438 transitions. [2023-08-04 02:46:37,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 168 flow [2023-08-04 02:46:37,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:37,994 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 99 flow [2023-08-04 02:46:37,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-08-04 02:46:37,995 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2023-08-04 02:46:37,995 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 99 flow [2023-08-04 02:46:37,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 02:46:37,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:37,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:37,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:46:37,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:46:37,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:37,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2080305056, now seen corresponding path program 1 times [2023-08-04 02:46:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633736739] [2023-08-04 02:46:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:38,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633736739] [2023-08-04 02:46:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633736739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514100435] [2023-08-04 02:46:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:38,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:38,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:38,043 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 02:46:38,045 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 02:46:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:38,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:46:38,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:38,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:46:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:38,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514100435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:46:38,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:46:38,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:46:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848578316] [2023-08-04 02:46:38,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:46:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:38,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-04 02:46:38,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 02:46:38,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:38,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-04 02:46:38,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:38,627 INFO L124 PetriNetUnfolderBase]: 4030/5217 cut-off events. [2023-08-04 02:46:38,627 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-08-04 02:46:38,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10549 conditions, 5217 events. 4030/5217 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20674 event pairs, 1103 based on Foata normal form. 4/3523 useless extension candidates. Maximal degree in co-relation 5495. Up to 4928 conditions per place. [2023-08-04 02:46:38,650 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 32 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-04 02:46:38,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 186 flow [2023-08-04 02:46:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:46:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:46:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-04 02:46:38,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630225080385852 [2023-08-04 02:46:38,652 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-04 02:46:38,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-04 02:46:38,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:38,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-04 02:46:38,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 02:46:38,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 02:46:38,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 311.0) internal successors, (1555), 5 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 02:46:38,656 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 99 flow. Second operand 4 states and 576 transitions. [2023-08-04 02:46:38,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 186 flow [2023-08-04 02:46:38,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:46:38,657 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 96 flow [2023-08-04 02:46:38,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-04 02:46:38,658 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2023-08-04 02:46:38,658 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 96 flow [2023-08-04 02:46:38,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 02:46:38,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:38,659 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:38,663 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 02:46:38,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:46:38,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:46:38,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1321982769, now seen corresponding path program 1 times [2023-08-04 02:46:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:38,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505514099] [2023-08-04 02:46:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:38,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:46:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505514099] [2023-08-04 02:46:38,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505514099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900528857] [2023-08-04 02:46:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:38,939 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 02:46:38,941 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 02:46:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:39,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:46:39,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:46:39,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:46:39,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900528857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:39,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:46:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:46:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234048278] [2023-08-04 02:46:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:46:39,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 311 [2023-08-04 02:46:39,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 02:46:39,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:39,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 311 [2023-08-04 02:46:39,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:39,317 INFO L124 PetriNetUnfolderBase]: 2850/3702 cut-off events. [2023-08-04 02:46:39,318 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2023-08-04 02:46:39,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7560 conditions, 3702 events. 2850/3702 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 14264 event pairs, 98 based on Foata normal form. 256/2711 useless extension candidates. Maximal degree in co-relation 2131. Up to 1672 conditions per place. [2023-08-04 02:46:39,322 INFO L140 encePairwiseOnDemand]: 308/311 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2023-08-04 02:46:39,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 258 flow [2023-08-04 02:46:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:46:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:46:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-04 02:46:39,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46881028938906755 [2023-08-04 02:46:39,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-04 02:46:39,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-04 02:46:39,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:39,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-04 02:46:39,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 02:46:39,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 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 02:46:39,328 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 311.0) internal successors, (1866), 6 states have internal predecessors, (1866), 0 states have call successors, (0), 0 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 02:46:39,328 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 96 flow. Second operand 5 states and 729 transitions. [2023-08-04 02:46:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 258 flow [2023-08-04 02:46:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 251 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:46:39,330 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 02:46:39,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 02:46:39,330 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2023-08-04 02:46:39,330 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 02:46:39,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 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 02:46:39,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:46:39,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:46:39,335 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 02:46:39,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:39,536 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:46:39,536 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:46:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,583 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 02:46:39,583 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:46:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 02:46:39,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:46:39,587 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 02:46:39,632 INFO L124 PetriNetUnfolderBase]: 137/862 cut-off events. [2023-08-04 02:46:39,632 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:46:39,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 862 events. 137/862 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4359 event pairs, 1 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 520. Up to 32 conditions per place. [2023-08-04 02:46:39,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-08-04 02:46:42,797 INFO L134 LiptonReduction]: Checked pairs total: 11690 [2023-08-04 02:46:42,797 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-04 02:46:42,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:46:42,799 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;@73fbb81e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:46:42,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:46:42,801 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:46:42,801 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 02:46:42,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:46:42,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:42,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:46:42,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:42,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1176517730, now seen corresponding path program 1 times [2023-08-04 02:46:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583867074] [2023-08-04 02:46:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:42,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:42,825 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 02:46:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583867074] [2023-08-04 02:46:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583867074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:42,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:46:42,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:46:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735887671] [2023-08-04 02:46:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:46:42,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 306 [2023-08-04 02:46:42,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 02:46:42,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:42,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 306 [2023-08-04 02:46:42,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:44,150 INFO L124 PetriNetUnfolderBase]: 20561/26499 cut-off events. [2023-08-04 02:46:44,150 INFO L125 PetriNetUnfolderBase]: For 2083/2083 co-relation queries the response was YES. [2023-08-04 02:46:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53600 conditions, 26499 events. 20561/26499 cut-off events. For 2083/2083 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 131165 event pairs, 9671 based on Foata normal form. 0/16789 useless extension candidates. Maximal degree in co-relation 20216. Up to 25630 conditions per place. [2023-08-04 02:46:44,234 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 42 selfloop transitions, 2 changer transitions 2/54 dead transitions. [2023-08-04 02:46:44,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2023-08-04 02:46:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 02:46:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49455337690631807 [2023-08-04 02:46:44,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 02:46:44,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 02:46:44,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:44,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 02:46:44,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 02:46:44,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:44,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:44,239 INFO L175 Difference]: Start difference. First operand has 46 places, 50 transitions, 148 flow. Second operand 3 states and 454 transitions. [2023-08-04 02:46:44,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2023-08-04 02:46:44,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:46:44,241 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 146 flow [2023-08-04 02:46:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-04 02:46:44,242 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 02:46:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 146 flow [2023-08-04 02:46:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 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 02:46:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:46:44,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:44,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -423655731, now seen corresponding path program 1 times [2023-08-04 02:46:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974623937] [2023-08-04 02:46:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:44,273 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 02:46:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:44,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974623937] [2023-08-04 02:46:44,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974623937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641137815] [2023-08-04 02:46:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:44,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:44,277 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 02:46:44,279 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 02:46:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:44,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:46:44,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:44,341 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 02:46:44,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:46:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641137815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:44,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:46:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:46:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094134555] [2023-08-04 02:46:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:44,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:44,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 306 [2023-08-04 02:46:44,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 02:46:44,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:44,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 306 [2023-08-04 02:46:44,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:45,870 INFO L124 PetriNetUnfolderBase]: 20611/26555 cut-off events. [2023-08-04 02:46:45,870 INFO L125 PetriNetUnfolderBase]: For 1945/1945 co-relation queries the response was YES. [2023-08-04 02:46:45,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53588 conditions, 26555 events. 20611/26555 cut-off events. For 1945/1945 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 132228 event pairs, 9644 based on Foata normal form. 0/16793 useless extension candidates. Maximal degree in co-relation 53548. Up to 25348 conditions per place. [2023-08-04 02:46:45,958 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 02:46:45,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 270 flow [2023-08-04 02:46:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-04 02:46:45,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 02:46:45,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-04 02:46:45,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-04 02:46:45,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:45,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-04 02:46:45,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 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 02:46:45,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:45,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:45,962 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 146 flow. Second operand 3 states and 459 transitions. [2023-08-04 02:46:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 270 flow [2023-08-04 02:46:45,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:46:45,967 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 150 flow [2023-08-04 02:46:45,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-04 02:46:45,968 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2023-08-04 02:46:45,968 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 150 flow [2023-08-04 02:46:45,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 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 02:46:45,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:45,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:45,975 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 02:46:46,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:46,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:46,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1058072505, now seen corresponding path program 1 times [2023-08-04 02:46:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783814400] [2023-08-04 02:46:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:46,214 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 02:46:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:46,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783814400] [2023-08-04 02:46:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783814400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:46,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11107957] [2023-08-04 02:46:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:46,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:46,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:46,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:46:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:46,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:46:46,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:46,318 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 02:46:46,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:46:46,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11107957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:46,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:46:46,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:46:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336170800] [2023-08-04 02:46:46,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:46,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:46,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 306 [2023-08-04 02:46:46,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 02:46:46,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:46,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 306 [2023-08-04 02:46:46,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:47,480 INFO L124 PetriNetUnfolderBase]: 16691/21872 cut-off events. [2023-08-04 02:46:47,480 INFO L125 PetriNetUnfolderBase]: For 1304/1304 co-relation queries the response was YES. [2023-08-04 02:46:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 21872 events. 16691/21872 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 111130 event pairs, 6754 based on Foata normal form. 0/14543 useless extension candidates. Maximal degree in co-relation 12865. Up to 15187 conditions per place. [2023-08-04 02:46:47,551 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 57 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-04 02:46:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 314 flow [2023-08-04 02:46:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 02:46:47,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076252723311547 [2023-08-04 02:46:47,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 02:46:47,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 02:46:47,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:47,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 02:46:47,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 02:46:47,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:47,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:47,555 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 150 flow. Second operand 3 states and 466 transitions. [2023-08-04 02:46:47,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 314 flow [2023-08-04 02:46:47,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:47,557 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 160 flow [2023-08-04 02:46:47,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-04 02:46:47,558 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 02:46:47,558 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 160 flow [2023-08-04 02:46:47,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 02:46:47,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:47,558 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 02:46:47,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 02:46:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:47,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:47,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1443150294, now seen corresponding path program 1 times [2023-08-04 02:46:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488235421] [2023-08-04 02:46:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:47,805 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 02:46:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488235421] [2023-08-04 02:46:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488235421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900635758] [2023-08-04 02:46:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:47,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:47,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:47,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:47,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:46:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:47,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:46:47,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:47,920 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 02:46:47,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:46:47,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900635758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:47,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:46:47,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:46:47,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723460748] [2023-08-04 02:46:47,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:47,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:47,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:47,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 306 [2023-08-04 02:46:47,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 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 02:46:47,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:47,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 306 [2023-08-04 02:46:47,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:49,137 INFO L124 PetriNetUnfolderBase]: 16210/21375 cut-off events. [2023-08-04 02:46:49,137 INFO L125 PetriNetUnfolderBase]: For 3547/3547 co-relation queries the response was YES. [2023-08-04 02:46:49,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45455 conditions, 21375 events. 16210/21375 cut-off events. For 3547/3547 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 107865 event pairs, 7857 based on Foata normal form. 0/14819 useless extension candidates. Maximal degree in co-relation 13533. Up to 16941 conditions per place. [2023-08-04 02:46:49,202 INFO L140 encePairwiseOnDemand]: 303/306 looper letters, 58 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-08-04 02:46:49,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 326 flow [2023-08-04 02:46:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 02:46:49,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076252723311547 [2023-08-04 02:46:49,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 02:46:49,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 02:46:49,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:49,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 02:46:49,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 02:46:49,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:49,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:49,207 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 160 flow. Second operand 3 states and 466 transitions. [2023-08-04 02:46:49,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 326 flow [2023-08-04 02:46:49,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:49,228 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 170 flow [2023-08-04 02:46:49,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 02:46:49,229 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 02:46:49,229 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 170 flow [2023-08-04 02:46:49,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 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 02:46:49,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:49,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:49,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:46:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:49,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:49,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1485300789, now seen corresponding path program 1 times [2023-08-04 02:46:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504575626] [2023-08-04 02:46:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:49,483 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 02:46:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504575626] [2023-08-04 02:46:49,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504575626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546684491] [2023-08-04 02:46:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:49,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:49,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:49,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:46:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:49,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:46:49,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:49,584 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 02:46:49,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:46:49,597 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 02:46:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546684491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:46:49,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:46:49,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:46:49,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900658523] [2023-08-04 02:46:49,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:46:49,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:49,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:49,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-08-04 02:46:49,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 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 02:46:49,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:49,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-08-04 02:46:49,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:50,949 INFO L124 PetriNetUnfolderBase]: 14752/19404 cut-off events. [2023-08-04 02:46:50,950 INFO L125 PetriNetUnfolderBase]: For 2793/2793 co-relation queries the response was YES. [2023-08-04 02:46:50,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41594 conditions, 19404 events. 14752/19404 cut-off events. For 2793/2793 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 95748 event pairs, 4723 based on Foata normal form. 4/13530 useless extension candidates. Maximal degree in co-relation 30283. Up to 18612 conditions per place. [2023-08-04 02:46:51,001 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 50 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-04 02:46:51,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 300 flow [2023-08-04 02:46:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:46:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:46:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-04 02:46:51,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48366013071895425 [2023-08-04 02:46:51,003 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-04 02:46:51,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-04 02:46:51,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:51,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-04 02:46:51,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 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 02:46:51,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:51,006 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:51,006 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 170 flow. Second operand 4 states and 592 transitions. [2023-08-04 02:46:51,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 300 flow [2023-08-04 02:46:51,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:51,065 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 182 flow [2023-08-04 02:46:51,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2023-08-04 02:46:51,065 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 02:46:51,065 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 182 flow [2023-08-04 02:46:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 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 02:46:51,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:51,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:51,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:46:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:51,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:51,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1334260430, now seen corresponding path program 1 times [2023-08-04 02:46:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:51,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725151924] [2023-08-04 02:46:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:51,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725151924] [2023-08-04 02:46:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725151924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677144562] [2023-08-04 02:46:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:51,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:51,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:46:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:51,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:46:51,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:51,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:46:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:46:51,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677144562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:46:51,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:46:51,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:46:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738855876] [2023-08-04 02:46:51,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:46:51,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:51,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-08-04 02:46:51,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 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 02:46:51,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:51,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-08-04 02:46:51,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:52,519 INFO L124 PetriNetUnfolderBase]: 14164/18597 cut-off events. [2023-08-04 02:46:52,519 INFO L125 PetriNetUnfolderBase]: For 1841/1841 co-relation queries the response was YES. [2023-08-04 02:46:52,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39751 conditions, 18597 events. 14164/18597 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 93470 event pairs, 4159 based on Foata normal form. 64/13014 useless extension candidates. Maximal degree in co-relation 28552. Up to 14457 conditions per place. [2023-08-04 02:46:52,610 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 02:46:52,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 360 flow [2023-08-04 02:46:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:46:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:46:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 02:46:52,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934640522875817 [2023-08-04 02:46:52,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 02:46:52,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 02:46:52,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:52,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 02:46:52,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 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 02:46:52,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:52,615 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:52,615 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 182 flow. Second operand 4 states and 604 transitions. [2023-08-04 02:46:52,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 360 flow [2023-08-04 02:46:52,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 351 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:46:52,662 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 187 flow [2023-08-04 02:46:52,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-04 02:46:52,663 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 02:46:52,663 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 187 flow [2023-08-04 02:46:52,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 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 02:46:52,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:52,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:52,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:46:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:46:52,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:52,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 294881369, now seen corresponding path program 1 times [2023-08-04 02:46:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:52,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991336572] [2023-08-04 02:46:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:46:52,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:52,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991336572] [2023-08-04 02:46:52,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991336572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82403872] [2023-08-04 02:46:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:52,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:52,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:46:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:52,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:46:52,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:46:53,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:46:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:46:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82403872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:46:53,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:46:53,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:46:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712260994] [2023-08-04 02:46:53,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:46:53,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:53,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-08-04 02:46:53,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 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 02:46:53,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:53,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-08-04 02:46:53,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:53,742 INFO L124 PetriNetUnfolderBase]: 9736/12905 cut-off events. [2023-08-04 02:46:53,742 INFO L125 PetriNetUnfolderBase]: For 3592/3592 co-relation queries the response was YES. [2023-08-04 02:46:53,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 12905 events. 9736/12905 cut-off events. For 3592/3592 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60750 event pairs, 2097 based on Foata normal form. 256/9250 useless extension candidates. Maximal degree in co-relation 25906. Up to 4752 conditions per place. [2023-08-04 02:46:53,779 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 69 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 02:46:53,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 402 flow [2023-08-04 02:46:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:46:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:46:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 02:46:53,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991830065359477 [2023-08-04 02:46:53,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 02:46:53,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 02:46:53,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:53,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 02:46:53,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 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 02:46:53,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:53,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:53,784 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 187 flow. Second operand 4 states and 611 transitions. [2023-08-04 02:46:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 402 flow [2023-08-04 02:46:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 392 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:46:53,803 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 198 flow [2023-08-04 02:46:53,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-04 02:46:53,803 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-08-04 02:46:53,803 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 198 flow [2023-08-04 02:46:53,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 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 02:46:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:53,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:53,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:46:54,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:54,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:54,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash 128369130, now seen corresponding path program 1 times [2023-08-04 02:46:54,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:54,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245441933] [2023-08-04 02:46:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:46:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245441933] [2023-08-04 02:46:54,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245441933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:46:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902518114] [2023-08-04 02:46:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:54,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:46:54,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:46:54,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:46:54,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:46:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:54,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:46:54,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:46:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:46:54,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:46:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:46:54,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902518114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:46:54,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:46:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:46:54,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051546007] [2023-08-04 02:46:54,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:46:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:54,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:54,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-08-04 02:46:54,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 02:46:54,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:54,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-08-04 02:46:54,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:54,938 INFO L124 PetriNetUnfolderBase]: 9716/12870 cut-off events. [2023-08-04 02:46:54,938 INFO L125 PetriNetUnfolderBase]: For 5569/5569 co-relation queries the response was YES. [2023-08-04 02:46:54,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29327 conditions, 12870 events. 9716/12870 cut-off events. For 5569/5569 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 60420 event pairs, 5425 based on Foata normal form. 17/8984 useless extension candidates. Maximal degree in co-relation 27113. Up to 11417 conditions per place. [2023-08-04 02:46:54,986 INFO L140 encePairwiseOnDemand]: 302/306 looper letters, 69 selfloop transitions, 3 changer transitions 2/82 dead transitions. [2023-08-04 02:46:54,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 414 flow [2023-08-04 02:46:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:46:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:46:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 02:46:54,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991830065359477 [2023-08-04 02:46:54,988 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 02:46:54,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 02:46:54,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:54,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 02:46:54,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 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 02:46:54,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:54,991 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 306.0) internal successors, (1530), 5 states have internal predecessors, (1530), 0 states have call successors, (0), 0 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 02:46:54,991 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 198 flow. Second operand 4 states and 611 transitions. [2023-08-04 02:46:54,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 414 flow [2023-08-04 02:46:55,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 82 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:55,031 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 202 flow [2023-08-04 02:46:55,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-08-04 02:46:55,032 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-08-04 02:46:55,032 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 202 flow [2023-08-04 02:46:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 02:46:55,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:55,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:55,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 02:46:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:46:55,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:55,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1317107108, now seen corresponding path program 1 times [2023-08-04 02:46:55,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:55,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640391210] [2023-08-04 02:46:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:46:55,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:55,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640391210] [2023-08-04 02:46:55,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640391210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:55,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:46:55,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 02:46:55,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776491257] [2023-08-04 02:46:55,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:55,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:46:55,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:46:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:46:55,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 306 [2023-08-04 02:46:55,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 02:46:55,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:55,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 306 [2023-08-04 02:46:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:56,369 INFO L124 PetriNetUnfolderBase]: 12781/16597 cut-off events. [2023-08-04 02:46:56,370 INFO L125 PetriNetUnfolderBase]: For 9092/9092 co-relation queries the response was YES. [2023-08-04 02:46:56,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38359 conditions, 16597 events. 12781/16597 cut-off events. For 9092/9092 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 82785 event pairs, 2086 based on Foata normal form. 1/11597 useless extension candidates. Maximal degree in co-relation 37985. Up to 13221 conditions per place. [2023-08-04 02:46:56,422 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 75 selfloop transitions, 5 changer transitions 1/89 dead transitions. [2023-08-04 02:46:56,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 530 flow [2023-08-04 02:46:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:46:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:46:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 02:46:56,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217864923747276 [2023-08-04 02:46:56,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 02:46:56,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 02:46:56,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:56,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 02:46:56,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 02:46:56,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:56,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 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 02:46:56,426 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 202 flow. Second operand 3 states and 479 transitions. [2023-08-04 02:46:56,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 530 flow [2023-08-04 02:46:56,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 514 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:46:56,454 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 227 flow [2023-08-04 02:46:56,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-04 02:46:56,454 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-08-04 02:46:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 227 flow [2023-08-04 02:46:56,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 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 02:46:56,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:56,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 02:46:56,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:56,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -430187208, now seen corresponding path program 1 times [2023-08-04 02:46:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126738948] [2023-08-04 02:46:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:46:56,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126738948] [2023-08-04 02:46:56,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126738948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:56,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:46:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:46:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588659478] [2023-08-04 02:46:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:56,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 306 [2023-08-04 02:46:56,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:46:56,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:56,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 306 [2023-08-04 02:46:56,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:46:58,383 INFO L124 PetriNetUnfolderBase]: 22150/30212 cut-off events. [2023-08-04 02:46:58,383 INFO L125 PetriNetUnfolderBase]: For 14580/14580 co-relation queries the response was YES. [2023-08-04 02:46:58,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75966 conditions, 30212 events. 22150/30212 cut-off events. For 14580/14580 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 172219 event pairs, 11074 based on Foata normal form. 0/22679 useless extension candidates. Maximal degree in co-relation 75212. Up to 16452 conditions per place. [2023-08-04 02:46:58,494 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 117 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2023-08-04 02:46:58,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 128 transitions, 790 flow [2023-08-04 02:46:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:46:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:46:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2023-08-04 02:46:58,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947712418300654 [2023-08-04 02:46:58,496 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2023-08-04 02:46:58,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2023-08-04 02:46:58,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:46:58,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2023-08-04 02:46:58,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 02:46:58,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:46:58,501 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:46:58,501 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 227 flow. Second operand 5 states and 757 transitions. [2023-08-04 02:46:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 128 transitions, 790 flow [2023-08-04 02:46:58,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 128 transitions, 779 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:46:58,665 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 253 flow [2023-08-04 02:46:58,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-04 02:46:58,666 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-04 02:46:58,666 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 253 flow [2023-08-04 02:46:58,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:46:58,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:46:58,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:46:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 02:46:58,666 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:46:58,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:46:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1383727247, now seen corresponding path program 1 times [2023-08-04 02:46:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:46:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545834218] [2023-08-04 02:46:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:46:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:46:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:46:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:46:58,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:46:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545834218] [2023-08-04 02:46:58,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545834218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:46:58,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:46:58,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:46:58,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980209129] [2023-08-04 02:46:58,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:46:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:46:58,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:46:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:46:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:46:58,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 306 [2023-08-04 02:46:58,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:46:58,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:46:58,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 306 [2023-08-04 02:46:58,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:00,409 INFO L124 PetriNetUnfolderBase]: 17482/24277 cut-off events. [2023-08-04 02:47:00,409 INFO L125 PetriNetUnfolderBase]: For 13121/13737 co-relation queries the response was YES. [2023-08-04 02:47:00,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60898 conditions, 24277 events. 17482/24277 cut-off events. For 13121/13737 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 140130 event pairs, 11027 based on Foata normal form. 616/20522 useless extension candidates. Maximal degree in co-relation 60198. Up to 16436 conditions per place. [2023-08-04 02:47:00,503 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 117 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-04 02:47:00,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 817 flow [2023-08-04 02:47:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 758 transitions. [2023-08-04 02:47:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954248366013072 [2023-08-04 02:47:00,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 758 transitions. [2023-08-04 02:47:00,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 758 transitions. [2023-08-04 02:47:00,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:00,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 758 transitions. [2023-08-04 02:47:00,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.6) internal successors, (758), 5 states have internal predecessors, (758), 0 states have call successors, (0), 0 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 02:47:00,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:00,517 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:00,517 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 253 flow. Second operand 5 states and 758 transitions. [2023-08-04 02:47:00,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 817 flow [2023-08-04 02:47:00,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 129 transitions, 813 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:47:00,669 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 266 flow [2023-08-04 02:47:00,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-04 02:47:00,670 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-08-04 02:47:00,670 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 266 flow [2023-08-04 02:47:00,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:47:00,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:00,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:00,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 02:47:00,671 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:00,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 804488686, now seen corresponding path program 1 times [2023-08-04 02:47:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984321680] [2023-08-04 02:47:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:47:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984321680] [2023-08-04 02:47:00,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984321680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:47:00,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:47:00,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:47:00,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058360201] [2023-08-04 02:47:00,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:47:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:47:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:47:00,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 306 [2023-08-04 02:47:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:47:00,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:00,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 306 [2023-08-04 02:47:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:02,426 INFO L124 PetriNetUnfolderBase]: 14826/20674 cut-off events. [2023-08-04 02:47:02,426 INFO L125 PetriNetUnfolderBase]: For 12755/13481 co-relation queries the response was YES. [2023-08-04 02:47:02,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53423 conditions, 20674 events. 14826/20674 cut-off events. For 12755/13481 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 117662 event pairs, 9343 based on Foata normal form. 726/19258 useless extension candidates. Maximal degree in co-relation 52779. Up to 16442 conditions per place. [2023-08-04 02:47:02,562 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 108 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-08-04 02:47:02,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 781 flow [2023-08-04 02:47:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-08-04 02:47:02,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915032679738562 [2023-08-04 02:47:02,565 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-08-04 02:47:02,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-08-04 02:47:02,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:02,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-08-04 02:47:02,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 02:47:02,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:02,569 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:02,569 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 266 flow. Second operand 5 states and 752 transitions. [2023-08-04 02:47:02,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 781 flow [2023-08-04 02:47:02,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 776 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:47:02,674 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 278 flow [2023-08-04 02:47:02,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2023-08-04 02:47:02,675 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 02:47:02,675 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 278 flow [2023-08-04 02:47:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 02:47:02,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:02,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:02,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 02:47:02,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:02,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -255366987, now seen corresponding path program 1 times [2023-08-04 02:47:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:02,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564626266] [2023-08-04 02:47:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:02,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:02,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564626266] [2023-08-04 02:47:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564626266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:47:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:47:02,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:47:02,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068039732] [2023-08-04 02:47:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:47:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:47:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:47:02,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 306 [2023-08-04 02:47:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:47:02,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:02,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 306 [2023-08-04 02:47:02,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:04,039 INFO L124 PetriNetUnfolderBase]: 13653/18594 cut-off events. [2023-08-04 02:47:04,039 INFO L125 PetriNetUnfolderBase]: For 13275/13704 co-relation queries the response was YES. [2023-08-04 02:47:04,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49703 conditions, 18594 events. 13653/18594 cut-off events. For 13275/13704 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 100077 event pairs, 8218 based on Foata normal form. 429/18342 useless extension candidates. Maximal degree in co-relation 49187. Up to 16723 conditions per place. [2023-08-04 02:47:04,161 INFO L140 encePairwiseOnDemand]: 301/306 looper letters, 47 selfloop transitions, 2 changer transitions 53/109 dead transitions. [2023-08-04 02:47:04,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 109 transitions, 705 flow [2023-08-04 02:47:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-08-04 02:47:04,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849673202614379 [2023-08-04 02:47:04,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-08-04 02:47:04,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-08-04 02:47:04,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:04,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-08-04 02:47:04,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 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 02:47:04,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:04,166 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:04,166 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 278 flow. Second operand 5 states and 742 transitions. [2023-08-04 02:47:04,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 109 transitions, 705 flow [2023-08-04 02:47:04,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:47:04,240 INFO L231 Difference]: Finished difference. Result has 81 places, 56 transitions, 250 flow [2023-08-04 02:47:04,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2023-08-04 02:47:04,241 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 35 predicate places. [2023-08-04 02:47:04,241 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 250 flow [2023-08-04 02:47:04,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 02:47:04,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:04,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:04,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 02:47:04,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:04,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1466439259, now seen corresponding path program 1 times [2023-08-04 02:47:04,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:04,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262136277] [2023-08-04 02:47:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 02:47:04,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262136277] [2023-08-04 02:47:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262136277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847745752] [2023-08-04 02:47:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:04,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:47:04,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:47:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:04,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:47:04,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:47:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 02:47:04,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:47:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 02:47:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847745752] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:04,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:47:04,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-04 02:47:04,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785254647] [2023-08-04 02:47:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:47:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:04,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:47:04,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-04 02:47:04,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 306 [2023-08-04 02:47:04,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 56 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 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 02:47:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 306 [2023-08-04 02:47:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:05,787 INFO L124 PetriNetUnfolderBase]: 13428/17849 cut-off events. [2023-08-04 02:47:05,788 INFO L125 PetriNetUnfolderBase]: For 14143/14143 co-relation queries the response was YES. [2023-08-04 02:47:05,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49799 conditions, 17849 events. 13428/17849 cut-off events. For 14143/14143 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 88229 event pairs, 5383 based on Foata normal form. 771/18620 useless extension candidates. Maximal degree in co-relation 49768. Up to 9559 conditions per place. [2023-08-04 02:47:05,898 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 76 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2023-08-04 02:47:05,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 568 flow [2023-08-04 02:47:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-04 02:47:05,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2023-08-04 02:47:05,900 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-04 02:47:05,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-04 02:47:05,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:05,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-04 02:47:05,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 02:47:05,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:05,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:05,903 INFO L175 Difference]: Start difference. First operand has 81 places, 56 transitions, 250 flow. Second operand 5 states and 710 transitions. [2023-08-04 02:47:05,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 568 flow [2023-08-04 02:47:05,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 540 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-04 02:47:05,984 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 257 flow [2023-08-04 02:47:05,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-08-04 02:47:05,984 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 23 predicate places. [2023-08-04 02:47:05,985 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 257 flow [2023-08-04 02:47:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 0 states have call successors, (0), 0 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 02:47:05,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:05,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:05,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:47:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:06,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:06,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1585205108, now seen corresponding path program 1 times [2023-08-04 02:47:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103559660] [2023-08-04 02:47:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:47:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103559660] [2023-08-04 02:47:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103559660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173046100] [2023-08-04 02:47:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:06,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:06,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:06,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:47:06,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:47:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:06,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:47:06,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:47:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:47:06,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:47:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:47:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173046100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:47:06,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:47:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-04 02:47:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666874750] [2023-08-04 02:47:06,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:47:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 02:47:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 02:47:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-04 02:47:06,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 306 [2023-08-04 02:47:06,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 257 flow. Second operand has 9 states, 9 states have (on average 132.66666666666666) internal successors, (1194), 9 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 02:47:06,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:06,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 306 [2023-08-04 02:47:06,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:07,732 INFO L124 PetriNetUnfolderBase]: 13574/17889 cut-off events. [2023-08-04 02:47:07,732 INFO L125 PetriNetUnfolderBase]: For 18804/20594 co-relation queries the response was YES. [2023-08-04 02:47:07,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49592 conditions, 17889 events. 13574/17889 cut-off events. For 18804/20594 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 91193 event pairs, 4076 based on Foata normal form. 1790/16378 useless extension candidates. Maximal degree in co-relation 49559. Up to 9185 conditions per place. [2023-08-04 02:47:07,824 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 114 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2023-08-04 02:47:07,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 128 transitions, 835 flow [2023-08-04 02:47:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:47:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:47:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 870 transitions. [2023-08-04 02:47:07,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2023-08-04 02:47:07,826 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 870 transitions. [2023-08-04 02:47:07,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 870 transitions. [2023-08-04 02:47:07,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:07,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 870 transitions. [2023-08-04 02:47:07,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 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 02:47:07,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 02:47:07,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 02:47:07,830 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 257 flow. Second operand 6 states and 870 transitions. [2023-08-04 02:47:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 128 transitions, 835 flow [2023-08-04 02:47:07,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 128 transitions, 823 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:47:07,865 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 283 flow [2023-08-04 02:47:07,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2023-08-04 02:47:07,865 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2023-08-04 02:47:07,865 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 283 flow [2023-08-04 02:47:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 132.66666666666666) internal successors, (1194), 9 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 02:47:07,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:07,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:07,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:47:08,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:08,067 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:08,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash 580351369, now seen corresponding path program 1 times [2023-08-04 02:47:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:08,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163748809] [2023-08-04 02:47:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163748809] [2023-08-04 02:47:08,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163748809] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196835257] [2023-08-04 02:47:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:08,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:08,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:08,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:47:08,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:47:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:08,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:47:08,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:47:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:08,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:47:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196835257] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-04 02:47:08,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-04 02:47:08,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888319638] [2023-08-04 02:47:08,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:08,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:47:08,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:47:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-04 02:47:08,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 306 [2023-08-04 02:47:08,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 02:47:08,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:08,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 306 [2023-08-04 02:47:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:09,446 INFO L124 PetriNetUnfolderBase]: 12603/17001 cut-off events. [2023-08-04 02:47:09,446 INFO L125 PetriNetUnfolderBase]: For 23361/26417 co-relation queries the response was YES. [2023-08-04 02:47:09,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51076 conditions, 17001 events. 12603/17001 cut-off events. For 23361/26417 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 83747 event pairs, 5595 based on Foata normal form. 3056/18147 useless extension candidates. Maximal degree in co-relation 51040. Up to 9811 conditions per place. [2023-08-04 02:47:09,519 INFO L140 encePairwiseOnDemand]: 300/306 looper letters, 79 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-04 02:47:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 615 flow [2023-08-04 02:47:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 707 transitions. [2023-08-04 02:47:09,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620915032679739 [2023-08-04 02:47:09,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 707 transitions. [2023-08-04 02:47:09,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 707 transitions. [2023-08-04 02:47:09,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:09,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 707 transitions. [2023-08-04 02:47:09,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 02:47:09,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:09,523 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 306.0) internal successors, (1836), 6 states have internal predecessors, (1836), 0 states have call successors, (0), 0 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 02:47:09,523 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 283 flow. Second operand 5 states and 707 transitions. [2023-08-04 02:47:09,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 615 flow [2023-08-04 02:47:09,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 612 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:47:09,575 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 307 flow [2023-08-04 02:47:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2023-08-04 02:47:09,576 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 02:47:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 307 flow [2023-08-04 02:47:09,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 02:47:09,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:09,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:09,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:47:09,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-04 02:47:09,777 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:09,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash 550022517, now seen corresponding path program 1 times [2023-08-04 02:47:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:09,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771003384] [2023-08-04 02:47:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:47:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:09,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771003384] [2023-08-04 02:47:09,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771003384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:09,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174994788] [2023-08-04 02:47:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:09,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:09,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:47:09,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:47:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:09,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 02:47:09,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:47:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:09,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:47:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:47:10,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174994788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:47:10,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:47:10,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-08-04 02:47:10,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573417676] [2023-08-04 02:47:10,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:47:10,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 02:47:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 02:47:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-04 02:47:10,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 306 [2023-08-04 02:47:10,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 129.5) internal successors, (1295), 10 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 02:47:10,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:10,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 306 [2023-08-04 02:47:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:11,809 INFO L124 PetriNetUnfolderBase]: 15981/21306 cut-off events. [2023-08-04 02:47:11,809 INFO L125 PetriNetUnfolderBase]: For 40198/44246 co-relation queries the response was YES. [2023-08-04 02:47:11,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72201 conditions, 21306 events. 15981/21306 cut-off events. For 40198/44246 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 108085 event pairs, 3957 based on Foata normal form. 4048/24711 useless extension candidates. Maximal degree in co-relation 72162. Up to 8456 conditions per place. [2023-08-04 02:47:11,967 INFO L140 encePairwiseOnDemand]: 298/306 looper letters, 171 selfloop transitions, 20 changer transitions 0/197 dead transitions. [2023-08-04 02:47:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 197 transitions, 1413 flow [2023-08-04 02:47:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:47:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:47:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1274 transitions. [2023-08-04 02:47:11,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625998547567175 [2023-08-04 02:47:11,970 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1274 transitions. [2023-08-04 02:47:11,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1274 transitions. [2023-08-04 02:47:11,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:11,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1274 transitions. [2023-08-04 02:47:11,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 141.55555555555554) internal successors, (1274), 9 states have internal predecessors, (1274), 0 states have call successors, (0), 0 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 02:47:11,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 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 02:47:11,974 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 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 02:47:11,974 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 307 flow. Second operand 9 states and 1274 transitions. [2023-08-04 02:47:11,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 197 transitions, 1413 flow [2023-08-04 02:47:12,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 197 transitions, 1393 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:47:12,022 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 435 flow [2023-08-04 02:47:12,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=435, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2023-08-04 02:47:12,023 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2023-08-04 02:47:12,023 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 435 flow [2023-08-04 02:47:12,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.5) internal successors, (1295), 10 states have internal predecessors, (1295), 0 states have call successors, (0), 0 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 02:47:12,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:12,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:12,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 02:47:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:12,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:47:12,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1637375194, now seen corresponding path program 1 times [2023-08-04 02:47:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:12,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840781929] [2023-08-04 02:47:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:12,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:47:12,326 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:47:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:47:12,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:47:12,387 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:47:12,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:47:12,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 02:47:12,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:12,387 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 02:47:12,389 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:47:12,389 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:47:12,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:47:12 BasicIcfg [2023-08-04 02:47:12,478 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:47:12,478 INFO L158 Benchmark]: Toolchain (without parser) took 45114.14ms. Allocated memory was 350.2MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 312.0MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-04 02:47:12,478 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 350.2MB. Free memory is still 302.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:47:12,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.71ms. Allocated memory is still 350.2MB. Free memory was 312.0MB in the beginning and 299.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 02:47:12,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.41ms. Allocated memory is still 350.2MB. Free memory was 299.7MB in the beginning and 297.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:47:12,479 INFO L158 Benchmark]: Boogie Preprocessor took 25.43ms. Allocated memory is still 350.2MB. Free memory was 297.6MB in the beginning and 296.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:47:12,479 INFO L158 Benchmark]: RCFGBuilder took 476.26ms. Allocated memory is still 350.2MB. Free memory was 295.5MB in the beginning and 267.2MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-04 02:47:12,479 INFO L158 Benchmark]: TraceAbstraction took 44378.30ms. Allocated memory was 350.2MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 267.2MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2023-08-04 02:47:12,480 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 350.2MB. Free memory is still 302.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 204.71ms. Allocated memory is still 350.2MB. Free memory was 312.0MB in the beginning and 299.7MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.41ms. Allocated memory is still 350.2MB. Free memory was 299.7MB in the beginning and 297.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.43ms. Allocated memory is still 350.2MB. Free memory was 297.6MB in the beginning and 296.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 476.26ms. Allocated memory is still 350.2MB. Free memory was 295.5MB in the beginning and 267.2MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 44378.30ms. Allocated memory was 350.2MB in the beginning and 4.7GB in the end (delta: 4.4GB). Free memory was 267.2MB in the beginning and 2.0GB in the end (delta: -1.7GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 129 PlacesBefore, 32 PlacesAfterwards, 141 TransitionsBefore, 34 TransitionsAfterwards, 2662 CoEnabledTransitionPairs, 7 FixpointIterations, 48 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 14 ConcurrentYvCompositions, 10 ChoiceCompositions, 127 TotalNumberOfCompositions, 4239 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3476, independent: 3412, independent conditional: 0, independent unconditional: 3412, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1424, independent: 1406, independent conditional: 0, independent unconditional: 1406, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3476, independent: 2006, independent conditional: 0, independent unconditional: 2006, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 1424, unknown conditional: 0, unknown unconditional: 1424] , Statistics on independence cache: Total cache size (in pairs): 121, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 153 PlacesBefore, 46 PlacesAfterwards, 169 TransitionsBefore, 50 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 18 ConcurrentYvCompositions, 12 ChoiceCompositions, 142 TotalNumberOfCompositions, 12504 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10180, independent: 10076, independent conditional: 0, independent unconditional: 10076, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3496, independent: 3468, independent conditional: 0, independent unconditional: 3468, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10180, independent: 6608, independent conditional: 0, independent unconditional: 6608, dependent: 76, dependent conditional: 0, dependent unconditional: 76, unknown: 3496, unknown conditional: 0, unknown unconditional: 3496] , Statistics on independence cache: Total cache size (in pairs): 331, Positive cache size: 322, Positive conditional cache size: 0, Positive unconditional cache size: 322, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 153 PlacesBefore, 46 PlacesAfterwards, 169 TransitionsBefore, 50 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 53 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 18 ConcurrentYvCompositions, 12 ChoiceCompositions, 137 TotalNumberOfCompositions, 11690 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9277, independent: 9185, independent conditional: 0, independent unconditional: 9185, dependent: 92, dependent conditional: 0, dependent unconditional: 92, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3510, independent: 3481, independent conditional: 0, independent unconditional: 3481, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9277, independent: 5704, independent conditional: 0, independent unconditional: 5704, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 3510, unknown conditional: 0, unknown unconditional: 3510] , Statistics on independence cache: Total cache size (in pairs): 334, Positive cache size: 326, Positive conditional cache size: 0, Positive unconditional cache size: 326, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1[2], t2[2]; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-5:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-5:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] 0 int asdf=0; VAL [A={-5:0}, N=1, asdf=0, counter=0, t1={5:0}, t2={3:0}] [L81] COND TRUE 0 asdf<2 [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={-5:0}, N=1, asdf=0, counter=0, pthread_create(&t1[asdf], 0, thread1, 0)=-4, t1={5:0}, t2={3:0}] [L81] 0 asdf++ VAL [A={-5:0}, N=1, asdf=1, counter=0, t1={5:0}, t2={3:0}] [L81] COND TRUE 0 asdf<2 [L49] 1 int i=0; VAL [A={-5:0}, N=1, counter=0, i=0] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp [L49] 1 i++ VAL [A={-5:0}, N=1, counter=6, i=1, tmp=6] [L81] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [A={-5:0}, N=1, asdf=1, counter=6, pthread_create(&t1[asdf], 0, thread1, 0)=-3, t1={5:0}, t2={3:0}] [L81] 0 asdf++ VAL [A={-5:0}, N=1, asdf=2, counter=6, t1={5:0}, t2={3:0}] [L49] 2 int i=0; VAL [A={-5:0}, N=1, counter=6, i=1, tmp=6] [L49] COND FALSE 1 !(i= 0 || a >= -2147483648 - b) [L38] COND FALSE 2 !(!cond) [L110] RET 2 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 2 !(!cond) [L111] RET 2 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 2 return a + b; [L51] RET, EXPR 2 plus(counter, A[i]) [L51] 2 int tmp = plus(counter, A[i]); [L81] COND FALSE 0 !(asdf<2) [L82] 0 int asdf=0; VAL [A={-5:0}, N=1, asdf=0, asdf=2, counter=6, t1={5:0}, t2={3:0}] [L82] COND TRUE 0 asdf<2 [L82] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [A={-5:0}, N=1, asdf=0, asdf=2, counter=6, pthread_create(&t2[asdf], 0, thread2, 0)=-2, t1={5:0}, t2={3:0}] [L62] 3 int i=0; VAL [A={-5:0}, N=1, counter=6, i=0] [L62] COND TRUE 3 i= b - 2147483648) [L38] COND FALSE 3 !(!cond) [L104] RET 3 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 3 !(!cond) [L105] RET 3 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 3 return a - b; [L64] RET, EXPR 3 minus(counter, A[i]) [L64] 3 int tmp = minus(counter, A[i]); [L54] 2 counter = tmp [L49] 2 i++ VAL [A={-5:0}, N=1, \result={0:0}, counter=12, i=1, tmp=6] [L49] COND FALSE 2 !(i= b - 2147483648) [L38] COND FALSE 4 !(!cond) [L104] RET 4 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 4 !(!cond) [L105] RET 4 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 4 return a - b; [L64] RET, EXPR 4 minus(counter, A[i]) [L64] 4 int tmp = minus(counter, A[i]); [L83] 0 asdf++ VAL [A={-5:0}, N=1, asdf=1, asdf=2, asdf=2, counter=0, t1={5:0}, t2={3:0}] [L67] 4 counter = tmp [L62] 4 i++ VAL [A={-5:0}, N=1, \result={0:0}, counter=-6, i=1, tmp=0] [L83] COND TRUE 0 asdf<2 [L83] 0 t1[asdf] VAL [A={-5:0}, N=1, asdf=1, asdf=2, asdf=2, counter=-6, t1={5:0}, t1[asdf]=-3, t2={3:0}] [L62] COND FALSE 4 !(i