/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_test-semi1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:31:39,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:31:39,272 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:31:39,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:31:39,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:31:39,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:31:39,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:31:39,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:31:39,305 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:31:39,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:31:39,309 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:31:39,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:31:39,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:31:39,311 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:31:39,311 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:31:39,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:31:39,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:31:39,312 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:31:39,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:31:39,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:31:39,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:31:39,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:31:39,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:31:39,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:31:39,315 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:31:39,315 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:31:39,315 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:31:39,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:31:39,316 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:31:39,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:31:39,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:31:39,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:31:39,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:31:39,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:31:39,317 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:31:39,318 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:31:39,319 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:31:39,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:31:39,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:31:39,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:31:39,535 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:31:39,536 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:31:39,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-semi1.wvr_bound2.c [2023-08-04 03:31:40,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:31:40,807 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:31:40,807 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_test-semi1.wvr_bound2.c [2023-08-04 03:31:40,812 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8018578/595ade85a9324f1992e70146070e615a/FLAGafa43b264 [2023-08-04 03:31:40,823 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8018578/595ade85a9324f1992e70146070e615a [2023-08-04 03:31:40,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:31:40,826 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:31:40,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:31:40,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:31:40,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:31:40,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:31:40" (1/1) ... [2023-08-04 03:31:40,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3f6185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:40, skipping insertion in model container [2023-08-04 03:31:40,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:31:40" (1/1) ... [2023-08-04 03:31:40,849 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:31:40,966 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_test-semi1.wvr_bound2.c[2141,2154] [2023-08-04 03:31:40,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:31:40,974 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:31:40,990 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_test-semi1.wvr_bound2.c[2141,2154] [2023-08-04 03:31:40,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:31:40,997 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:31:40,997 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:31:41,001 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:31:41,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41 WrapperNode [2023-08-04 03:31:41,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:31:41,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:31:41,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:31:41,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:31:41,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,029 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2023-08-04 03:31:41,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:31:41,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:31:41,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:31:41,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:31:41,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:31:41,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:31:41,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:31:41,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:31:41,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (1/1) ... [2023-08-04 03:31:41,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:31:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:41,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:31:41,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:31:41,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:31:41,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:31:41,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:31:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:31:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:31:41,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:31:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:31:41,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:31:41,106 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:31:41,171 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:31:41,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:31:41,335 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:31:41,380 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:31:41,380 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 03:31:41,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:31:41 BoogieIcfgContainer [2023-08-04 03:31:41,382 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:31:41,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:31:41,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:31:41,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:31:41,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:31:40" (1/3) ... [2023-08-04 03:31:41,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1625a11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:31:41, skipping insertion in model container [2023-08-04 03:31:41,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:31:41" (2/3) ... [2023-08-04 03:31:41,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1625a11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:31:41, skipping insertion in model container [2023-08-04 03:31:41,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:31:41" (3/3) ... [2023-08-04 03:31:41,389 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_test-semi1.wvr_bound2.c [2023-08-04 03:31:41,396 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:31:41,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:31:41,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:31:41,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:31:41,446 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:31:41,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 105 transitions, 232 flow [2023-08-04 03:31:41,564 INFO L124 PetriNetUnfolderBase]: 28/238 cut-off events. [2023-08-04 03:31:41,564 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:31:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 238 events. 28/238 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 719 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2023-08-04 03:31:41,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 105 transitions, 232 flow [2023-08-04 03:31:41,572 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 140 flow [2023-08-04 03:31:41,576 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:31:41,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 140 flow [2023-08-04 03:31:41,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 140 flow [2023-08-04 03:31:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 140 flow [2023-08-04 03:31:41,618 INFO L124 PetriNetUnfolderBase]: 4/94 cut-off events. [2023-08-04 03:31:41,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:31:41,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 94 events. 4/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-04 03:31:41,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 222 [2023-08-04 03:31:43,870 INFO L134 LiptonReduction]: Checked pairs total: 192 [2023-08-04 03:31:43,870 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-04 03:31:43,884 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:31:43,889 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;@67b9cbab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:31:43,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:31:43,893 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:31:43,893 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-08-04 03:31:43,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:31:43,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:43,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:31:43,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:43,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:43,898 INFO L85 PathProgramCache]: Analyzing trace with hash 367963586, now seen corresponding path program 1 times [2023-08-04 03:31:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:43,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723935650] [2023-08-04 03:31:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:43,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:31:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723935650] [2023-08-04 03:31:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723935650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:44,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:31:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:31:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512499146] [2023-08-04 03:31:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:44,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:31:44,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2023-08-04 03:31:44,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:44,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:44,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2023-08-04 03:31:44,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:44,183 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-04 03:31:44,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:31:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 33 events. 9/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 2 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 60. Up to 24 conditions per place. [2023-08-04 03:31:44,185 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 9 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-08-04 03:31:44,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 58 flow [2023-08-04 03:31:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-04 03:31:44,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174418604651163 [2023-08-04 03:31:44,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-04 03:31:44,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-04 03:31:44,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:44,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-04 03:31:44,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:44,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:44,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:44,211 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 32 flow. Second operand 3 states and 267 transitions. [2023-08-04 03:31:44,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 58 flow [2023-08-04 03:31:44,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:31:44,214 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 40 flow [2023-08-04 03:31:44,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-08-04 03:31:44,218 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, 3 predicate places. [2023-08-04 03:31:44,218 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 40 flow [2023-08-04 03:31:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:31:44,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:31:44,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:44,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1489981806, now seen corresponding path program 1 times [2023-08-04 03:31:44,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:44,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077289446] [2023-08-04 03:31:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:44,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:31:44,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:31:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:31:44,277 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:31:44,277 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:31:44,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:31:44,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:31:44,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:31:44,281 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:31:44,282 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:31:44,283 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:31:44,283 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:31:44,304 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:31:44,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 117 transitions, 282 flow [2023-08-04 03:31:44,412 INFO L124 PetriNetUnfolderBase]: 119/778 cut-off events. [2023-08-04 03:31:44,412 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:31:44,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 778 events. 119/778 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3823 event pairs, 1 based on Foata normal form. 0/656 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-08-04 03:31:44,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 117 transitions, 282 flow [2023-08-04 03:31:44,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 73 transitions, 170 flow [2023-08-04 03:31:44,418 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:31:44,418 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 73 transitions, 170 flow [2023-08-04 03:31:44,418 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 73 transitions, 170 flow [2023-08-04 03:31:44,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 73 transitions, 170 flow [2023-08-04 03:31:44,437 INFO L124 PetriNetUnfolderBase]: 5/167 cut-off events. [2023-08-04 03:31:44,437 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:31:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 167 events. 5/167 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 138. Up to 9 conditions per place. [2023-08-04 03:31:44,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-04 03:31:46,228 INFO L134 LiptonReduction]: Checked pairs total: 596 [2023-08-04 03:31:46,228 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-04 03:31:46,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:31:46,232 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;@67b9cbab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:31:46,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:31:46,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:31:46,235 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 03:31:46,235 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 03:31:46,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:46,236 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:31:46,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:46,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1482050178, now seen corresponding path program 1 times [2023-08-04 03:31:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655115278] [2023-08-04 03:31:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:46,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655115278] [2023-08-04 03:31:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655115278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:46,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:31:46,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:31:46,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355143594] [2023-08-04 03:31:46,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:46,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:46,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:46,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:31:46,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 182 [2023-08-04 03:31:46,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:46,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 182 [2023-08-04 03:31:46,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:46,382 INFO L124 PetriNetUnfolderBase]: 119/250 cut-off events. [2023-08-04 03:31:46,382 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 03:31:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 250 events. 119/250 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 925 event pairs, 72 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 224. Up to 214 conditions per place. [2023-08-04 03:31:46,384 INFO L140 encePairwiseOnDemand]: 179/182 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-04 03:31:46,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 96 flow [2023-08-04 03:31:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:46,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-08-04 03:31:46,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201465201465202 [2023-08-04 03:31:46,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-08-04 03:31:46,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-08-04 03:31:46,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:46,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-08-04 03:31:46,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,391 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 58 flow. Second operand 3 states and 284 transitions. [2023-08-04 03:31:46,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 96 flow [2023-08-04 03:31:46,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 92 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 03:31:46,392 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 66 flow [2023-08-04 03:31:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-04 03:31:46,393 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-04 03:31:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 66 flow [2023-08-04 03:31:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:46,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:31:46,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:31:46,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:46,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:46,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1366960882, now seen corresponding path program 1 times [2023-08-04 03:31:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959211141] [2023-08-04 03:31:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:31:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:46,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959211141] [2023-08-04 03:31:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959211141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863954754] [2023-08-04 03:31:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:46,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:46,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:46,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:31:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:46,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:31:46,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:31:46,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863954754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:46,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:31:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489209848] [2023-08-04 03:31:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:46,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:31:46,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2023-08-04 03:31:46,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2023-08-04 03:31:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:46,673 INFO L124 PetriNetUnfolderBase]: 115/242 cut-off events. [2023-08-04 03:31:46,673 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 03:31:46,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 242 events. 115/242 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 870 event pairs, 42 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 302. Up to 193 conditions per place. [2023-08-04 03:31:46,676 INFO L140 encePairwiseOnDemand]: 178/182 looper letters, 15 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-04 03:31:46,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 112 flow [2023-08-04 03:31:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:31:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:31:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-08-04 03:31:46,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-08-04 03:31:46,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-08-04 03:31:46,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-08-04 03:31:46,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:46,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-08-04 03:31:46,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 182.0) internal successors, (1092), 6 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,685 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 66 flow. Second operand 5 states and 460 transitions. [2023-08-04 03:31:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 112 flow [2023-08-04 03:31:46,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:31:46,687 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 80 flow [2023-08-04 03:31:46,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-04 03:31:46,689 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-08-04 03:31:46,689 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 80 flow [2023-08-04 03:31:46,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:46,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:46,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:46,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:46,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:46,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1985463917, now seen corresponding path program 1 times [2023-08-04 03:31:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:46,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240094283] [2023-08-04 03:31:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240094283] [2023-08-04 03:31:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240094283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980564337] [2023-08-04 03:31:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:46,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:46,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:31:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:47,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:47,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:47,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980564337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:47,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:47,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:31:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706342086] [2023-08-04 03:31:47,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:47,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:47,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:47,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 182 [2023-08-04 03:31:47,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:47,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 182 [2023-08-04 03:31:47,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:47,161 INFO L124 PetriNetUnfolderBase]: 88/179 cut-off events. [2023-08-04 03:31:47,161 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 03:31:47,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 179 events. 88/179 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 28 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 215. Up to 141 conditions per place. [2023-08-04 03:31:47,163 INFO L140 encePairwiseOnDemand]: 179/182 looper letters, 15 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-04 03:31:47,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 118 flow [2023-08-04 03:31:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2023-08-04 03:31:47,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2023-08-04 03:31:47,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2023-08-04 03:31:47,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2023-08-04 03:31:47,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:47,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2023-08-04 03:31:47,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,168 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 80 flow. Second operand 4 states and 371 transitions. [2023-08-04 03:31:47,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 118 flow [2023-08-04 03:31:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 113 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 03:31:47,170 INFO L231 Difference]: Finished difference. Result has 33 places, 17 transitions, 73 flow [2023-08-04 03:31:47,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2023-08-04 03:31:47,170 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-04 03:31:47,171 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 73 flow [2023-08-04 03:31:47,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:47,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:47,180 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 03:31:47,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:47,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:31:47,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash 382819817, now seen corresponding path program 1 times [2023-08-04 03:31:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5168287] [2023-08-04 03:31:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:31:47,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:47,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5168287] [2023-08-04 03:31:47,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5168287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:47,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294805381] [2023-08-04 03:31:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:47,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:47,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:47,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:31:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:47,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:31:47,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:31:47,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294805381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:47,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:31:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108998024] [2023-08-04 03:31:47,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:47,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:31:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:31:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:47,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 182 [2023-08-04 03:31:47,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:47,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 182 [2023-08-04 03:31:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:47,575 INFO L124 PetriNetUnfolderBase]: 56/123 cut-off events. [2023-08-04 03:31:47,575 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 03:31:47,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 123 events. 56/123 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 321 event pairs, 8 based on Foata normal form. 16/134 useless extension candidates. Maximal degree in co-relation 190. Up to 60 conditions per place. [2023-08-04 03:31:47,576 INFO L140 encePairwiseOnDemand]: 180/182 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 03:31:47,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 117 flow [2023-08-04 03:31:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2023-08-04 03:31:47,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151098901098901 [2023-08-04 03:31:47,578 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2023-08-04 03:31:47,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2023-08-04 03:31:47,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:47,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2023-08-04 03:31:47,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,581 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 182.0) internal successors, (910), 5 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,581 INFO L175 Difference]: Start difference. First operand has 33 places, 17 transitions, 73 flow. Second operand 4 states and 375 transitions. [2023-08-04 03:31:47,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 117 flow [2023-08-04 03:31:47,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:31:47,582 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 03:31:47,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 03:31:47,583 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-04 03:31:47,583 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 03:31:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:47,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:31:47,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:31:47,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:47,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:47,789 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:31:47,790 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:31:47,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 117 transitions, 282 flow [2023-08-04 03:31:47,839 INFO L124 PetriNetUnfolderBase]: 119/778 cut-off events. [2023-08-04 03:31:47,839 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:31:47,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 778 events. 119/778 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3823 event pairs, 1 based on Foata normal form. 0/656 useless extension candidates. Maximal degree in co-relation 460. Up to 32 conditions per place. [2023-08-04 03:31:47,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 117 transitions, 282 flow [2023-08-04 03:31:47,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 107 transitions, 254 flow [2023-08-04 03:31:47,845 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:31:47,845 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 107 transitions, 254 flow [2023-08-04 03:31:47,849 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 107 transitions, 254 flow [2023-08-04 03:31:47,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 107 transitions, 254 flow [2023-08-04 03:31:47,885 INFO L124 PetriNetUnfolderBase]: 119/646 cut-off events. [2023-08-04 03:31:47,886 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-04 03:31:47,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 646 events. 119/646 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2840 event pairs, 1 based on Foata normal form. 0/540 useless extension candidates. Maximal degree in co-relation 393. Up to 32 conditions per place. [2023-08-04 03:31:47,890 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 03:31:49,811 INFO L134 LiptonReduction]: Checked pairs total: 3267 [2023-08-04 03:31:49,812 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-04 03:31:49,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:31:49,813 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;@67b9cbab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:31:49,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:31:49,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:31:49,815 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 03:31:49,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:31:49,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:49,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 03:31:49,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:49,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 637011109, now seen corresponding path program 1 times [2023-08-04 03:31:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:49,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870148681] [2023-08-04 03:31:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:31:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870148681] [2023-08-04 03:31:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870148681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:49,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:31:49,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:31:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004006872] [2023-08-04 03:31:49,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:49,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:49,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:31:49,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:49,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:49,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:49,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:49,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:50,000 INFO L124 PetriNetUnfolderBase]: 1053/1865 cut-off events. [2023-08-04 03:31:50,000 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2023-08-04 03:31:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1865 events. 1053/1865 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9295 event pairs, 641 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 1472. Up to 1725 conditions per place. [2023-08-04 03:31:50,011 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-04 03:31:50,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 176 flow [2023-08-04 03:31:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-04 03:31:50,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2023-08-04 03:31:50,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-04 03:31:50,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-04 03:31:50,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:50,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-04 03:31:50,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,015 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 106 flow. Second operand 3 states and 300 transitions. [2023-08-04 03:31:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 176 flow [2023-08-04 03:31:50,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:31:50,021 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 112 flow [2023-08-04 03:31:50,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-08-04 03:31:50,022 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2023-08-04 03:31:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 112 flow [2023-08-04 03:31:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:50,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:31:50,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:50,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2074184624, now seen corresponding path program 1 times [2023-08-04 03:31:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890296002] [2023-08-04 03:31:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:31:50,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890296002] [2023-08-04 03:31:50,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890296002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:50,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538817877] [2023-08-04 03:31:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:50,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:50,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:50,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:31:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:50,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:50,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:31:50,141 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:50,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538817877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:31:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537197022] [2023-08-04 03:31:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:50,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:50,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:50,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:50,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:50,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:50,300 INFO L124 PetriNetUnfolderBase]: 1047/1873 cut-off events. [2023-08-04 03:31:50,300 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-08-04 03:31:50,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 1873 events. 1047/1873 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9411 event pairs, 644 based on Foata normal form. 0/1668 useless extension candidates. Maximal degree in co-relation 3848. Up to 1679 conditions per place. [2023-08-04 03:31:50,309 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 03:31:50,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 192 flow [2023-08-04 03:31:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-04 03:31:50,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2023-08-04 03:31:50,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-04 03:31:50,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-04 03:31:50,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:50,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-04 03:31:50,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,314 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 112 flow. Second operand 3 states and 302 transitions. [2023-08-04 03:31:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 192 flow [2023-08-04 03:31:50,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:50,317 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 122 flow [2023-08-04 03:31:50,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-04 03:31:50,318 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 03:31:50,319 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 122 flow [2023-08-04 03:31:50,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:50,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:50,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:50,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:50,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 148145227, now seen corresponding path program 1 times [2023-08-04 03:31:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973771308] [2023-08-04 03:31:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:31:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973771308] [2023-08-04 03:31:50,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973771308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:50,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105401824] [2023-08-04 03:31:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:50,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:50,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:50,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:50,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:31:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:50,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:50,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:31:50,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105401824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:50,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 03:31:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860588522] [2023-08-04 03:31:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:50,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:50,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:50,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:50,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:50,803 INFO L124 PetriNetUnfolderBase]: 957/1759 cut-off events. [2023-08-04 03:31:50,803 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 03:31:50,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 1759 events. 957/1759 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8848 event pairs, 620 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 1684. Up to 1295 conditions per place. [2023-08-04 03:31:50,812 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 39 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 03:31:50,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 234 flow [2023-08-04 03:31:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 03:31:50,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49198717948717946 [2023-08-04 03:31:50,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 03:31:50,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 03:31:50,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:50,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 03:31:50,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,817 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 122 flow. Second operand 3 states and 307 transitions. [2023-08-04 03:31:50,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 234 flow [2023-08-04 03:31:50,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:50,819 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 132 flow [2023-08-04 03:31:50,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-08-04 03:31:50,821 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 03:31:50,821 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 132 flow [2023-08-04 03:31:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:50,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:50,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:51,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:51,027 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:51,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1897808947, now seen corresponding path program 1 times [2023-08-04 03:31:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:51,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069669579] [2023-08-04 03:31:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:51,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:31:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069669579] [2023-08-04 03:31:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069669579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732236767] [2023-08-04 03:31:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:51,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:51,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:51,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:51,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:31:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:51,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:31:51,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:31:51,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732236767] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:51,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:51,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 03:31:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451489948] [2023-08-04 03:31:51,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:51,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:31:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:31:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:51,347 INFO L124 PetriNetUnfolderBase]: 964/1818 cut-off events. [2023-08-04 03:31:51,347 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 03:31:51,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 1818 events. 964/1818 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9181 event pairs, 675 based on Foata normal form. 0/1778 useless extension candidates. Maximal degree in co-relation 1963. Up to 1281 conditions per place. [2023-08-04 03:31:51,356 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 40 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 03:31:51,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 246 flow [2023-08-04 03:31:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:31:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:31:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 03:31:51,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49198717948717946 [2023-08-04 03:31:51,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 03:31:51,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 03:31:51,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:51,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 03:31:51,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,360 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 132 flow. Second operand 3 states and 307 transitions. [2023-08-04 03:31:51,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 246 flow [2023-08-04 03:31:51,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:51,363 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 142 flow [2023-08-04 03:31:51,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-04 03:31:51,364 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 03:31:51,364 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 142 flow [2023-08-04 03:31:51,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:51,365 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] [2023-08-04 03:31:51,372 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 03:31:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:51,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:51,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2741161, now seen corresponding path program 1 times [2023-08-04 03:31:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913154992] [2023-08-04 03:31:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:31:51,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913154992] [2023-08-04 03:31:51,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913154992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866220700] [2023-08-04 03:31:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:51,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:31:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:51,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:51,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:31:51,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:31:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866220700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:51,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:51,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:31:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137223428] [2023-08-04 03:31:51,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:51,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 208 [2023-08-04 03:31:51,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:51,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 208 [2023-08-04 03:31:51,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:51,871 INFO L124 PetriNetUnfolderBase]: 862/1622 cut-off events. [2023-08-04 03:31:51,871 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 03:31:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3777 conditions, 1622 events. 862/1622 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8020 event pairs, 387 based on Foata normal form. 2/1619 useless extension candidates. Maximal degree in co-relation 2162. Up to 1465 conditions per place. [2023-08-04 03:31:51,879 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 34 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2023-08-04 03:31:51,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 228 flow [2023-08-04 03:31:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-08-04 03:31:51,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2023-08-04 03:31:51,881 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-08-04 03:31:51,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-08-04 03:31:51,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:51,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-08-04 03:31:51,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,884 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,884 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 142 flow. Second operand 4 states and 388 transitions. [2023-08-04 03:31:51,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 228 flow [2023-08-04 03:31:51,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:51,890 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 154 flow [2023-08-04 03:31:51,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 03:31:51,891 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-04 03:31:51,891 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 154 flow [2023-08-04 03:31:51,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:51,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:51,892 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] [2023-08-04 03:31:51,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:52,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:52,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1606083772, now seen corresponding path program 1 times [2023-08-04 03:31:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:52,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903933090] [2023-08-04 03:31:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:52,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903933090] [2023-08-04 03:31:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903933090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915969979] [2023-08-04 03:31:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:52,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:52,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:52,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:31:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:52,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:52,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:52,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:31:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915969979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:52,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:52,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:31:52,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734262258] [2023-08-04 03:31:52,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:52,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 208 [2023-08-04 03:31:52,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:52,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:52,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 208 [2023-08-04 03:31:52,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:52,405 INFO L124 PetriNetUnfolderBase]: 810/1526 cut-off events. [2023-08-04 03:31:52,406 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 03:31:52,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 1526 events. 810/1526 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7205 event pairs, 364 based on Foata normal form. 8/1529 useless extension candidates. Maximal degree in co-relation 2191. Up to 1245 conditions per place. [2023-08-04 03:31:52,413 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 38 selfloop transitions, 3 changer transitions 1/46 dead transitions. [2023-08-04 03:31:52,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 256 flow [2023-08-04 03:31:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-04 03:31:52,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2023-08-04 03:31:52,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-04 03:31:52,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-04 03:31:52,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:52,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-04 03:31:52,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:52,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:52,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:52,418 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 154 flow. Second operand 4 states and 392 transitions. [2023-08-04 03:31:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 256 flow [2023-08-04 03:31:52,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 247 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:52,423 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 159 flow [2023-08-04 03:31:52,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-08-04 03:31:52,423 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2023-08-04 03:31:52,423 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 159 flow [2023-08-04 03:31:52,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:52,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:52,424 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] [2023-08-04 03:31:52,435 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 03:31:52,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 03:31:52,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:52,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:52,636 INFO L85 PathProgramCache]: Analyzing trace with hash 590693906, now seen corresponding path program 1 times [2023-08-04 03:31:52,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:52,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772833632] [2023-08-04 03:31:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:52,681 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 03:31:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772833632] [2023-08-04 03:31:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772833632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111279620] [2023-08-04 03:31:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:53,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:53,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:31:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:53,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:53,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:53,221 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 03:31:53,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:53,232 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 03:31:53,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111279620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:53,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:53,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:31:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740210446] [2023-08-04 03:31:53,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:53,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:53,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 208 [2023-08-04 03:31:53,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:53,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 208 [2023-08-04 03:31:53,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:53,397 INFO L124 PetriNetUnfolderBase]: 534/1034 cut-off events. [2023-08-04 03:31:53,397 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 03:31:53,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1034 events. 534/1034 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4312 event pairs, 215 based on Foata normal form. 32/1061 useless extension candidates. Maximal degree in co-relation 1905. Up to 444 conditions per place. [2023-08-04 03:31:53,403 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 43 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-04 03:31:53,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 290 flow [2023-08-04 03:31:53,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2023-08-04 03:31:53,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47716346153846156 [2023-08-04 03:31:53,405 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:53,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,409 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,409 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 159 flow. Second operand 4 states and 397 transitions. [2023-08-04 03:31:53,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 290 flow [2023-08-04 03:31:53,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 280 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:53,412 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 170 flow [2023-08-04 03:31:53,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-04 03:31:53,413 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-08-04 03:31:53,413 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 170 flow [2023-08-04 03:31:53,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:53,414 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] [2023-08-04 03:31:53,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:31:53,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:53,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1836041681, now seen corresponding path program 1 times [2023-08-04 03:31:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096849931] [2023-08-04 03:31:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:53,677 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 03:31:53,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096849931] [2023-08-04 03:31:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096849931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844436077] [2023-08-04 03:31:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:53,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:53,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:31:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:53,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:31:53,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:53,775 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 03:31:53,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:53,787 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 03:31:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844436077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:53,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:53,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:31:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079485063] [2023-08-04 03:31:53,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:53,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 208 [2023-08-04 03:31:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 93.4) internal successors, (467), 5 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 208 [2023-08-04 03:31:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:53,930 INFO L124 PetriNetUnfolderBase]: 530/1023 cut-off events. [2023-08-04 03:31:53,930 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 03:31:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1023 events. 530/1023 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4220 event pairs, 439 based on Foata normal form. 9/1027 useless extension candidates. Maximal degree in co-relation 2086. Up to 749 conditions per place. [2023-08-04 03:31:53,935 INFO L140 encePairwiseOnDemand]: 204/208 looper letters, 43 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2023-08-04 03:31:53,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 302 flow [2023-08-04 03:31:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:31:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:31:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2023-08-04 03:31:53,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47716346153846156 [2023-08-04 03:31:53,937 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:53,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2023-08-04 03:31:53,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,941 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,941 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 170 flow. Second operand 4 states and 397 transitions. [2023-08-04 03:31:53,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 302 flow [2023-08-04 03:31:53,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 298 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:31:53,944 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 174 flow [2023-08-04 03:31:53,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-04 03:31:53,945 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-08-04 03:31:53,945 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 174 flow [2023-08-04 03:31:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.4) internal successors, (467), 5 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:53,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:53,946 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] [2023-08-04 03:31:53,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:31:54,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:31:54,152 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:54,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1741801947, now seen corresponding path program 1 times [2023-08-04 03:31:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:54,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300222784] [2023-08-04 03:31:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:54,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:31:54,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:54,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300222784] [2023-08-04 03:31:54,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300222784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:54,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074291681] [2023-08-04 03:31:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:54,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:54,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:54,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:31:54,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 03:31:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:54,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 03:31:54,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:31:54,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:31:54,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074291681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:54,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:54,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 03:31:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982215160] [2023-08-04 03:31:54,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:54,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:54,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:31:54,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:54,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:54,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:54,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:54,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:54,865 INFO L124 PetriNetUnfolderBase]: 661/1269 cut-off events. [2023-08-04 03:31:54,865 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-08-04 03:31:54,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1269 events. 661/1269 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6051 event pairs, 228 based on Foata normal form. 1/1266 useless extension candidates. Maximal degree in co-relation 3193. Up to 667 conditions per place. [2023-08-04 03:31:54,871 INFO L140 encePairwiseOnDemand]: 202/208 looper letters, 61 selfloop transitions, 7 changer transitions 35/107 dead transitions. [2023-08-04 03:31:54,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 107 transitions, 730 flow [2023-08-04 03:31:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:31:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:31:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2023-08-04 03:31:54,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163461538461539 [2023-08-04 03:31:54,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2023-08-04 03:31:54,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2023-08-04 03:31:54,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:54,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2023-08-04 03:31:54,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:54,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:54,876 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:54,876 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 174 flow. Second operand 5 states and 537 transitions. [2023-08-04 03:31:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 107 transitions, 730 flow [2023-08-04 03:31:54,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 107 transitions, 705 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:31:54,882 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 217 flow [2023-08-04 03:31:54,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-04 03:31:54,882 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-08-04 03:31:54,882 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 217 flow [2023-08-04 03:31:54,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:54,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:54,883 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] [2023-08-04 03:31:54,893 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 03:31:55,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 03:31:55,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:55,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:55,090 INFO L85 PathProgramCache]: Analyzing trace with hash -731321841, now seen corresponding path program 1 times [2023-08-04 03:31:55,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:55,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162904354] [2023-08-04 03:31:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:31:55,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:55,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162904354] [2023-08-04 03:31:55,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162904354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504038690] [2023-08-04 03:31:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:55,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:55,898 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 03:31:55,901 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 03:31:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:55,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 03:31:55,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:56,081 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 03:31:56,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:31:56,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504038690] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:31:56,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:31:56,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 18 [2023-08-04 03:31:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042918457] [2023-08-04 03:31:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:31:56,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:31:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:31:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-04 03:31:56,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 208 [2023-08-04 03:31:56,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:56,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:56,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 208 [2023-08-04 03:31:56,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:56,316 INFO L124 PetriNetUnfolderBase]: 682/1391 cut-off events. [2023-08-04 03:31:56,316 INFO L125 PetriNetUnfolderBase]: For 2000/2000 co-relation queries the response was YES. [2023-08-04 03:31:56,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 1391 events. 682/1391 cut-off events. For 2000/2000 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 7430 event pairs, 184 based on Foata normal form. 1/1386 useless extension candidates. Maximal degree in co-relation 4565. Up to 516 conditions per place. [2023-08-04 03:31:56,322 INFO L140 encePairwiseOnDemand]: 202/208 looper letters, 42 selfloop transitions, 5 changer transitions 61/112 dead transitions. [2023-08-04 03:31:56,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 782 flow [2023-08-04 03:31:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:31:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:31:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 537 transitions. [2023-08-04 03:31:56,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163461538461539 [2023-08-04 03:31:56,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 537 transitions. [2023-08-04 03:31:56,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 537 transitions. [2023-08-04 03:31:56,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:56,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 537 transitions. [2023-08-04 03:31:56,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:56,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:56,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 208.0) internal successors, (1248), 6 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:56,327 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 217 flow. Second operand 5 states and 537 transitions. [2023-08-04 03:31:56,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 782 flow [2023-08-04 03:31:56,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 112 transitions, 782 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:31:56,334 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 220 flow [2023-08-04 03:31:56,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-04 03:31:56,334 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2023-08-04 03:31:56,335 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 220 flow [2023-08-04 03:31:56,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:56,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:31:56,335 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] [2023-08-04 03:31:56,345 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 03:31:56,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 03:31:56,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:31:56,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:31:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1135654369, now seen corresponding path program 2 times [2023-08-04 03:31:56,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:31:56,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401362865] [2023-08-04 03:31:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:31:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:31:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:31:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 03:31:57,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:31:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401362865] [2023-08-04 03:31:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401362865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:31:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935143503] [2023-08-04 03:31:57,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:31:57,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:31:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:31:57,081 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 03:31:57,083 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 03:31:57,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:31:57,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:31:57,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 03:31:57,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:31:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:31:57,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:31:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:31:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935143503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:31:57,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:31:57,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 15 [2023-08-04 03:31:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605824153] [2023-08-04 03:31:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:31:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 03:31:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:31:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 03:31:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-08-04 03:31:57,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 208 [2023-08-04 03:31:57,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 220 flow. Second operand has 16 states, 16 states have (on average 72.25) internal successors, (1156), 16 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:57,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:31:57,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 208 [2023-08-04 03:31:57,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:31:58,880 INFO L124 PetriNetUnfolderBase]: 152/354 cut-off events. [2023-08-04 03:31:58,881 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2023-08-04 03:31:58,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 354 events. 152/354 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1185 event pairs, 1 based on Foata normal form. 9/363 useless extension candidates. Maximal degree in co-relation 1440. Up to 125 conditions per place. [2023-08-04 03:31:58,882 INFO L140 encePairwiseOnDemand]: 190/208 looper letters, 0 selfloop transitions, 0 changer transitions 120/120 dead transitions. [2023-08-04 03:31:58,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 120 transitions, 954 flow [2023-08-04 03:31:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-04 03:31:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-04 03:31:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1890 transitions. [2023-08-04 03:31:58,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494822485207101 [2023-08-04 03:31:58,890 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1890 transitions. [2023-08-04 03:31:58,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1890 transitions. [2023-08-04 03:31:58,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:31:58,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1890 transitions. [2023-08-04 03:31:58,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 72.6923076923077) internal successors, (1890), 26 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:58,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 208.0) internal successors, (5616), 27 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:58,903 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 208.0) internal successors, (5616), 27 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:58,903 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 220 flow. Second operand 26 states and 1890 transitions. [2023-08-04 03:31:58,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 120 transitions, 954 flow [2023-08-04 03:31:58,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 808 flow, removed 50 selfloop flow, removed 7 redundant places. [2023-08-04 03:31:58,907 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-04 03:31:58,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-04 03:31:58,907 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-08-04 03:31:58,907 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-04 03:31:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 72.25) internal successors, (1156), 16 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:31:58,908 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:31:58,914 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 03:31:59,113 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,SelfDestructingSolverStorable16 [2023-08-04 03:31:59,114 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:31:59,114 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 03:31:59,114 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:31:59,115 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:31:59,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:31:59 BasicIcfg [2023-08-04 03:31:59,119 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:31:59,119 INFO L158 Benchmark]: Toolchain (without parser) took 18293.23ms. Allocated memory was 337.6MB in the beginning and 610.3MB in the end (delta: 272.6MB). Free memory was 285.7MB in the beginning and 394.8MB in the end (delta: -109.0MB). Peak memory consumption was 166.2MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,119 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 337.6MB. Free memory is still 290.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:31:59,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.34ms. Allocated memory is still 337.6MB. Free memory was 285.4MB in the beginning and 274.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,120 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.26ms. Allocated memory is still 337.6MB. Free memory was 274.5MB in the beginning and 272.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,120 INFO L158 Benchmark]: Boogie Preprocessor took 19.44ms. Allocated memory is still 337.6MB. Free memory was 272.8MB in the beginning and 271.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,120 INFO L158 Benchmark]: RCFGBuilder took 332.20ms. Allocated memory is still 337.6MB. Free memory was 271.1MB in the beginning and 256.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,121 INFO L158 Benchmark]: TraceAbstraction took 17734.75ms. Allocated memory was 337.6MB in the beginning and 610.3MB in the end (delta: 272.6MB). Free memory was 255.4MB in the beginning and 394.8MB in the end (delta: -139.4MB). Peak memory consumption was 136.9MB. Max. memory is 16.0GB. [2023-08-04 03:31:59,122 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 337.6MB. Free memory is still 290.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 174.34ms. Allocated memory is still 337.6MB. Free memory was 285.4MB in the beginning and 274.5MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.26ms. Allocated memory is still 337.6MB. Free memory was 274.5MB in the beginning and 272.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.44ms. Allocated memory is still 337.6MB. Free memory was 272.8MB in the beginning and 271.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 332.20ms. Allocated memory is still 337.6MB. Free memory was 271.1MB in the beginning and 256.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 17734.75ms. Allocated memory was 337.6MB in the beginning and 610.3MB in the end (delta: 272.6MB). Free memory was 255.4MB in the beginning and 394.8MB in the end (delta: -139.4MB). Peak memory consumption was 136.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 67 PlacesBefore, 16 PlacesAfterwards, 65 TransitionsBefore, 11 TransitionsAfterwards, 222 CoEnabledTransitionPairs, 7 FixpointIterations, 36 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 67 TotalNumberOfCompositions, 192 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 174, independent: 172, independent conditional: 0, independent unconditional: 172, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 117, independent: 116, independent conditional: 0, independent unconditional: 116, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 174, independent: 56, independent conditional: 0, independent unconditional: 56, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 117, unknown conditional: 0, unknown unconditional: 117] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 79 PlacesBefore, 26 PlacesAfterwards, 73 TransitionsBefore, 17 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 596 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 495, independent: 489, independent conditional: 0, independent unconditional: 489, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 275, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 495, independent: 219, independent conditional: 0, independent unconditional: 219, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 275, unknown conditional: 0, unknown unconditional: 275] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 14, Positive conditional cache size: 0, Positive unconditional cache size: 14, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 101 PlacesBefore, 34 PlacesAfterwards, 107 TransitionsBefore, 33 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 7 ChoiceCompositions, 91 TotalNumberOfCompositions, 3267 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2378, independent: 2328, independent conditional: 0, independent unconditional: 2328, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 736, independent: 722, independent conditional: 0, independent unconditional: 722, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2378, independent: 1606, independent conditional: 0, independent unconditional: 1606, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 736, unknown conditional: 0, unknown unconditional: 736] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 103 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 24 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 111 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.5s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 94 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 180 IncrementalHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 1 mSDtfsCounter, 180 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 188 SizeOfPredicates, 0 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 50/61 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 111 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.3s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 732 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 619 mSDsluCounter, 1306 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1286 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3353 IncrementalHoareTripleChecker+Invalid, 3408 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 20 mSDtfsCounter, 3353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 544 GetRequests, 451 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=10, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 565 NumberOfCodeBlocks, 565 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 737 ConstructedInterpolants, 0 QuantifiedInterpolants, 3327 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1438 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 240/323 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 03:31:59,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...