/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:00:51,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:00:51,187 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:00:51,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:00:51,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:00:51,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:00:51,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:00:51,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:00:51,226 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:00:51,231 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:00:51,231 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:00:51,232 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:00:51,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:00:51,233 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:00:51,234 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:00:51,234 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:00:51,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:00:51,234 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:00:51,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:00:51,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:00:51,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:00:51,236 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:00:51,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:00:51,236 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:00:51,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:00:51,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:00:51,237 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:00:51,237 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:00:51,237 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:00:51,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:00:51,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:00:51,238 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:00:51,239 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:00:51,240 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:00:51,240 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:00:51,240 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:00:51,240 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:00:51,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:00:51,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:00:51,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:00:51,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:00:51,507 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:00:51,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 03:00:52,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:00:52,759 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:00:52,760 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 03:00:52,766 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3491086e/61bac5e017e440d8a39305ed5e6cf0a0/FLAGfa8e807eb [2023-08-04 03:00:52,776 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3491086e/61bac5e017e440d8a39305ed5e6cf0a0 [2023-08-04 03:00:52,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:00:52,779 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:00:52,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:00:52,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:00:52,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:00:52,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:00:52" (1/1) ... [2023-08-04 03:00:52,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1434e8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:52, skipping insertion in model container [2023-08-04 03:00:52,784 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:00:52" (1/1) ... [2023-08-04 03:00:52,811 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:00:52,949 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c[3004,3017] [2023-08-04 03:00:52,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:00:52,962 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:00:52,986 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c[3004,3017] [2023-08-04 03:00:52,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:00:53,006 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:00:53,007 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:00:53,012 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:00:53,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53 WrapperNode [2023-08-04 03:00:53,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:00:53,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:00:53,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:00:53,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:00:53,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,026 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,053 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 251 [2023-08-04 03:00:53,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:00:53,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:00:53,054 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:00:53,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:00:53,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,066 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:00:53,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:00:53,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:00:53,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:00:53,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (1/1) ... [2023-08-04 03:00:53,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:00:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:00:53,131 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 03:00:53,140 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 03:00:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:00:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:00:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:00:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:00:53,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:00:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:00:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:00:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:00:53,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:00:53,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:00:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:00:53,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:00:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:00:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:00:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:00:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:00:53,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:00:53,170 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 03:00:53,293 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:00:53,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:00:53,639 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:00:53,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:00:53,810 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:00:53,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:00:53 BoogieIcfgContainer [2023-08-04 03:00:53,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:00:53,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:00:53,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:00:53,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:00:53,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:00:52" (1/3) ... [2023-08-04 03:00:53,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ff6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:00:53, skipping insertion in model container [2023-08-04 03:00:53,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:00:53" (2/3) ... [2023-08-04 03:00:53,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ff6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:00:53, skipping insertion in model container [2023-08-04 03:00:53,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:00:53" (3/3) ... [2023-08-04 03:00:53,823 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 03:00:53,829 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:00:53,838 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:00:53,838 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:00:53,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:00:53,923 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:00:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,141 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 03:00:54,141 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:00:54,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 03:00:54,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:00:54,177 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 03:00:54,254 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 03:00:54,255 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:00:54,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 03:00:54,269 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 03:00:58,940 INFO L134 LiptonReduction]: Checked pairs total: 11200 [2023-08-04 03:00:58,940 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 03:00:58,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:00:58,956 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;@6c6ee069, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:00:58,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:00:58,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:00:58,961 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 03:00:58,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:00:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:00:58,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:00:58,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:00:58,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:00:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -176869310, now seen corresponding path program 1 times [2023-08-04 03:00:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:00:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390658688] [2023-08-04 03:00:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:00:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:00:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:00:59,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:00:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:00:59,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:00:59,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:00:59,146 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:00:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:00:59,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:00:59,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:00:59,150 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:00:59,155 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:00:59,156 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:00:59,156 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:00:59,214 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:00:59,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:00:59,775 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 03:00:59,775 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:00:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33448 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 03:00:59,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:00:59,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 240 transitions, 570 flow [2023-08-04 03:00:59,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:00:59,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 03:00:59,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 03:00:59,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:01:00,295 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 03:01:00,295 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:01:00,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33448 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 03:01:00,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 03:01:05,248 INFO L134 LiptonReduction]: Checked pairs total: 37969 [2023-08-04 03:01:05,249 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 03:01:05,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:01:05,251 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;@6c6ee069, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:01:05,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:01:05,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:01:05,260 INFO L124 PetriNetUnfolderBase]: 16/126 cut-off events. [2023-08-04 03:01:05,260 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:01:05,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:01:05,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:01:05,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:01:05,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:01:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1498115553, now seen corresponding path program 1 times [2023-08-04 03:01:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:01:05,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863480591] [2023-08-04 03:01:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:05,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:01:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:01:05,425 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 03:01:05,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:01:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863480591] [2023-08-04 03:01:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863480591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:01:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463530107] [2023-08-04 03:01:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:05,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:01:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:01:05,437 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 03:01:05,460 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 03:01:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:01:05,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:01:05,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:01:05,596 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 03:01:05,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:01:05,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463530107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:01:05,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:01:05,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:01:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124655153] [2023-08-04 03:01:05,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:01:05,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:01:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:01:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:01:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:01:05,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 431 [2023-08-04 03:01:05,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:01:05,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:01:05,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 431 [2023-08-04 03:01:05,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:34,882 INFO L124 PetriNetUnfolderBase]: 1064694/1271442 cut-off events. [2023-08-04 03:02:34,882 INFO L125 PetriNetUnfolderBase]: For 125442/125442 co-relation queries the response was YES. [2023-08-04 03:02:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572083 conditions, 1271442 events. 1064694/1271442 cut-off events. For 125442/125442 co-relation queries the response was YES. Maximal size of possible extension queue 25860. Compared 7001468 event pairs, 428881 based on Foata normal form. 0/804420 useless extension candidates. Maximal degree in co-relation 911638. Up to 1236401 conditions per place. [2023-08-04 03:02:40,029 INFO L140 encePairwiseOnDemand]: 426/431 looper letters, 43 selfloop transitions, 5 changer transitions 31/90 dead transitions. [2023-08-04 03:02:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 418 flow [2023-08-04 03:02:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:02:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:02:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2023-08-04 03:02:40,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47006960556844546 [2023-08-04 03:02:40,045 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2023-08-04 03:02:40,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2023-08-04 03:02:40,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:40,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2023-08-04 03:02:40,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:40,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:40,078 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:40,080 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 248 flow. Second operand 5 states and 1013 transitions. [2023-08-04 03:02:40,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 418 flow [2023-08-04 03:02:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 410 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:02:40,171 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 145 flow [2023-08-04 03:02:40,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2023-08-04 03:02:40,175 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-04 03:02:40,176 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 145 flow [2023-08-04 03:02:40,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.8) internal successors, (944), 5 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:40,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:40,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:40,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:02:40,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:40,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:40,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1959881466, now seen corresponding path program 1 times [2023-08-04 03:02:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054689595] [2023-08-04 03:02:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:40,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:02:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:40,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054689595] [2023-08-04 03:02:40,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054689595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:40,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:02:40,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:02:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078286768] [2023-08-04 03:02:40,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:40,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:02:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:40,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:02:40,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:02:40,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 431 [2023-08-04 03:02:40,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:40,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:40,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 431 [2023-08-04 03:02:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:52,155 INFO L124 PetriNetUnfolderBase]: 163242/192333 cut-off events. [2023-08-04 03:02:52,156 INFO L125 PetriNetUnfolderBase]: For 5397/5397 co-relation queries the response was YES. [2023-08-04 03:02:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389759 conditions, 192333 events. 163242/192333 cut-off events. For 5397/5397 co-relation queries the response was YES. Maximal size of possible extension queue 3956. Compared 828849 event pairs, 81949 based on Foata normal form. 1/124236 useless extension candidates. Maximal degree in co-relation 166447. Up to 189600 conditions per place. [2023-08-04 03:02:53,324 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 39 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 03:02:53,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 232 flow [2023-08-04 03:02:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:02:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:02:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-04 03:02:53,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46790409899458624 [2023-08-04 03:02:53,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-04 03:02:53,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-04 03:02:53,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:53,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-04 03:02:53,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:53,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:53,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:53,335 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 145 flow. Second operand 3 states and 605 transitions. [2023-08-04 03:02:53,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 232 flow [2023-08-04 03:02:53,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 227 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:02:53,343 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 139 flow [2023-08-04 03:02:53,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-04 03:02:53,344 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -11 predicate places. [2023-08-04 03:02:53,345 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 139 flow [2023-08-04 03:02:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:53,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:53,345 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:02:53,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:53,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1593951966, now seen corresponding path program 1 times [2023-08-04 03:02:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634568290] [2023-08-04 03:02:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:53,430 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 03:02:53,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:53,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634568290] [2023-08-04 03:02:53,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634568290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:53,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443482796] [2023-08-04 03:02:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:53,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:53,433 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 03:02:53,435 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 03:02:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:53,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:02:53,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:53,550 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 03:02:53,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:02:53,570 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 03:02:53,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443482796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:02:53,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:02:53,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:02:53,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169878727] [2023-08-04 03:02:53,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:02:53,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:02:53,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 431 [2023-08-04 03:02:53,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:02:53,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:53,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 431 [2023-08-04 03:02:53,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:03,138 INFO L124 PetriNetUnfolderBase]: 135774/159073 cut-off events. [2023-08-04 03:03:03,138 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2023-08-04 03:03:03,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321559 conditions, 159073 events. 135774/159073 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 3494. Compared 657218 event pairs, 51581 based on Foata normal form. 4/102531 useless extension candidates. Maximal degree in co-relation 166031. Up to 156800 conditions per place. [2023-08-04 03:03:04,033 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 03:03:04,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 248 flow [2023-08-04 03:03:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:03:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:03:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 795 transitions. [2023-08-04 03:03:04,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611368909512761 [2023-08-04 03:03:04,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 795 transitions. [2023-08-04 03:03:04,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 795 transitions. [2023-08-04 03:03:04,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:04,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 795 transitions. [2023-08-04 03:03:04,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:04,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:04,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:04,043 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 139 flow. Second operand 4 states and 795 transitions. [2023-08-04 03:03:04,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 248 flow [2023-08-04 03:03:04,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:03:04,046 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 136 flow [2023-08-04 03:03:04,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2023-08-04 03:03:04,047 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-04 03:03:04,047 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 136 flow [2023-08-04 03:03:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:04,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:04,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:04,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:03:04,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 03:03:04,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:03:04,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:04,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1315563947, now seen corresponding path program 1 times [2023-08-04 03:03:04,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:04,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559253960] [2023-08-04 03:03:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:04,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:03:04,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:04,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559253960] [2023-08-04 03:03:04,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559253960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:03:04,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154540252] [2023-08-04 03:03:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:03:04,358 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 03:03:04,361 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 03:03:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:04,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:03:04,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:03:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:03:04,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:03:04,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154540252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:03:04,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:03:04,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:03:04,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144852676] [2023-08-04 03:03:04,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:03:04,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:03:04,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:04,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:03:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:03:04,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 431 [2023-08-04 03:03:04,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:04,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:04,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 431 [2023-08-04 03:03:04,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:13,648 INFO L124 PetriNetUnfolderBase]: 129090/153366 cut-off events. [2023-08-04 03:03:13,649 INFO L125 PetriNetUnfolderBase]: For 2547/2547 co-relation queries the response was YES. [2023-08-04 03:03:14,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308714 conditions, 153366 events. 129090/153366 cut-off events. For 2547/2547 co-relation queries the response was YES. Maximal size of possible extension queue 3548. Compared 684691 event pairs, 22706 based on Foata normal form. 0/99783 useless extension candidates. Maximal degree in co-relation 84691. Up to 147120 conditions per place. [2023-08-04 03:03:14,449 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 62 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-08-04 03:03:14,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 328 flow [2023-08-04 03:03:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:03:14,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:03:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-08-04 03:03:14,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649651972157773 [2023-08-04 03:03:14,452 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-08-04 03:03:14,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-08-04 03:03:14,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:14,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-08-04 03:03:14,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:14,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:14,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:14,459 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 136 flow. Second operand 5 states and 1002 transitions. [2023-08-04 03:03:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 328 flow [2023-08-04 03:03:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 321 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:03:14,464 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 148 flow [2023-08-04 03:03:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-08-04 03:03:14,464 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-04 03:03:14,465 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 148 flow [2023-08-04 03:03:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.8) internal successors, (949), 5 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:14,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:14,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:14,475 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 03:03:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:14,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:03:14,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 306061599, now seen corresponding path program 1 times [2023-08-04 03:03:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955797529] [2023-08-04 03:03:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:03:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:14,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955797529] [2023-08-04 03:03:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955797529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:03:14,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:03:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:03:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096719495] [2023-08-04 03:03:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:03:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:03:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:03:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:03:14,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 431 [2023-08-04 03:03:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 431 [2023-08-04 03:03:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:23,487 INFO L124 PetriNetUnfolderBase]: 123586/147094 cut-off events. [2023-08-04 03:03:23,488 INFO L125 PetriNetUnfolderBase]: For 3473/3473 co-relation queries the response was YES. [2023-08-04 03:03:23,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296410 conditions, 147094 events. 123586/147094 cut-off events. For 3473/3473 co-relation queries the response was YES. Maximal size of possible extension queue 3577. Compared 658750 event pairs, 62794 based on Foata normal form. 16/95942 useless extension candidates. Maximal degree in co-relation 81208. Up to 142309 conditions per place. [2023-08-04 03:03:24,443 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 46 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 03:03:24,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 261 flow [2023-08-04 03:03:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:03:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:03:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-04 03:03:24,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725444702242846 [2023-08-04 03:03:24,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-04 03:03:24,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-04 03:03:24,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:24,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-04 03:03:24,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:24,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:24,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:24,450 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 148 flow. Second operand 3 states and 611 transitions. [2023-08-04 03:03:24,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 261 flow [2023-08-04 03:03:24,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:03:24,454 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 146 flow [2023-08-04 03:03:24,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-08-04 03:03:24,454 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-04 03:03:24,455 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 146 flow [2023-08-04 03:03:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:24,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:24,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:24,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:03:24,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:03:24,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash -907411197, now seen corresponding path program 1 times [2023-08-04 03:03:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:24,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132003667] [2023-08-04 03:03:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:03:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132003667] [2023-08-04 03:03:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132003667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:03:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757790052] [2023-08-04 03:03:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:24,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:03:24,509 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 03:03:24,511 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 03:03:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:24,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:03:24,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:03:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:03:24,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:03:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:03:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757790052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:03:24,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:03:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:03:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603244362] [2023-08-04 03:03:24,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:03:24,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:03:24,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:03:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:03:24,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 431 [2023-08-04 03:03:24,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:24,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:24,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 431 [2023-08-04 03:03:24,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:32,067 INFO L124 PetriNetUnfolderBase]: 102690/121718 cut-off events. [2023-08-04 03:03:32,067 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2023-08-04 03:03:32,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245274 conditions, 121718 events. 102690/121718 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 3458. Compared 531937 event pairs, 39954 based on Foata normal form. 64/79318 useless extension candidates. Maximal degree in co-relation 67032. Up to 116029 conditions per place. [2023-08-04 03:03:32,726 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 56 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-04 03:03:32,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 305 flow [2023-08-04 03:03:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:03:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:03:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 807 transitions. [2023-08-04 03:03:32,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680974477958237 [2023-08-04 03:03:32,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 807 transitions. [2023-08-04 03:03:32,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 807 transitions. [2023-08-04 03:03:32,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:32,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 807 transitions. [2023-08-04 03:03:32,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.75) internal successors, (807), 4 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:32,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:32,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:32,734 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 146 flow. Second operand 4 states and 807 transitions. [2023-08-04 03:03:32,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 305 flow [2023-08-04 03:03:32,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:03:32,737 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 143 flow [2023-08-04 03:03:32,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-08-04 03:03:32,737 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2023-08-04 03:03:32,737 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 143 flow [2023-08-04 03:03:32,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:32,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:32,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:32,748 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 03:03:32,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:32,944 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:03:32,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash -386328442, now seen corresponding path program 1 times [2023-08-04 03:03:32,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003829159] [2023-08-04 03:03:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:03:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003829159] [2023-08-04 03:03:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003829159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:03:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118925265] [2023-08-04 03:03:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:33,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:03:33,018 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 03:03:33,020 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 03:03:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:33,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:03:33,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:03:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:03:33,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:03:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118925265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:03:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:03:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:03:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720717163] [2023-08-04 03:03:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:03:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:03:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:03:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:03:33,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 431 [2023-08-04 03:03:33,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:33,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:33,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 431 [2023-08-04 03:03:33,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:03:38,171 INFO L124 PetriNetUnfolderBase]: 74170/87838 cut-off events. [2023-08-04 03:03:38,172 INFO L125 PetriNetUnfolderBase]: For 3141/3141 co-relation queries the response was YES. [2023-08-04 03:03:38,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178170 conditions, 87838 events. 74170/87838 cut-off events. For 3141/3141 co-relation queries the response was YES. Maximal size of possible extension queue 2444. Compared 367877 event pairs, 2586 based on Foata normal form. 4096/60542 useless extension candidates. Maximal degree in co-relation 54257. Up to 40192 conditions per place. [2023-08-04 03:03:38,430 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-04 03:03:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 401 flow [2023-08-04 03:03:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:03:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:03:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-08-04 03:03:38,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47238979118329466 [2023-08-04 03:03:38,433 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-08-04 03:03:38,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-08-04 03:03:38,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:03:38,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-08-04 03:03:38,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:38,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:38,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:38,438 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 143 flow. Second operand 5 states and 1018 transitions. [2023-08-04 03:03:38,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 401 flow [2023-08-04 03:03:38,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 394 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:03:38,580 INFO L231 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2023-08-04 03:03:38,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2023-08-04 03:03:38,581 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-04 03:03:38,581 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2023-08-04 03:03:38,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:38,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:03:38,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:03:38,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:03:38,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:03:38,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:03:38,782 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:38,783 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:03:38,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,217 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 03:03:39,218 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:03:39,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33448 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 03:03:39,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,253 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:03:39,253 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,253 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 03:03:39,603 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 03:03:39,604 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:03:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33448 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 03:03:39,700 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 03:03:43,961 INFO L134 LiptonReduction]: Checked pairs total: 35335 [2023-08-04 03:03:43,961 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-04 03:03:43,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:03:43,963 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;@6c6ee069, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:03:43,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:03:43,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:03:43,966 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 03:03:43,966 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:03:43,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:03:43,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:03:43,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:03:43,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:03:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1682591573, now seen corresponding path program 1 times [2023-08-04 03:03:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:03:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440942958] [2023-08-04 03:03:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:03:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:03:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:03:43,992 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 03:03:43,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:03:43,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440942958] [2023-08-04 03:03:43,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440942958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:03:43,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:03:43,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:03:43,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875516238] [2023-08-04 03:03:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:03:43,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:03:43,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:03:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:03:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:03:44,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-08-04 03:03:44,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:03:44,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:03:44,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-08-04 03:03:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:05:11,821 INFO L124 PetriNetUnfolderBase]: 1058051/1258840 cut-off events. [2023-08-04 03:05:11,822 INFO L125 PetriNetUnfolderBase]: For 125241/125241 co-relation queries the response was YES. [2023-08-04 03:05:15,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551270 conditions, 1258840 events. 1058051/1258840 cut-off events. For 125241/125241 co-relation queries the response was YES. Maximal size of possible extension queue 24573. Compared 6749517 event pairs, 534125 based on Foata normal form. 0/796821 useless extension candidates. Maximal degree in co-relation 925146. Up to 1228387 conditions per place. [2023-08-04 03:05:22,004 INFO L140 encePairwiseOnDemand]: 426/430 looper letters, 66 selfloop transitions, 2 changer transitions 3/83 dead transitions. [2023-08-04 03:05:22,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 392 flow [2023-08-04 03:05:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:05:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:05:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2023-08-04 03:05:22,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49147286821705427 [2023-08-04 03:05:22,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2023-08-04 03:05:22,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2023-08-04 03:05:22,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:05:22,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2023-08-04 03:05:22,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:22,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:22,012 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:22,012 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 248 flow. Second operand 3 states and 634 transitions. [2023-08-04 03:05:22,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 392 flow [2023-08-04 03:05:22,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:05:22,100 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 240 flow [2023-08-04 03:05:22,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 03:05:22,103 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-04 03:05:22,103 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 240 flow [2023-08-04 03:05:22,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:22,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:05:22,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:05:22,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:05:22,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:05:22,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:05:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2104549972, now seen corresponding path program 1 times [2023-08-04 03:05:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:05:22,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81700846] [2023-08-04 03:05:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:05:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:05:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:05:22,191 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 03:05:22,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:05:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81700846] [2023-08-04 03:05:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81700846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:05:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569748863] [2023-08-04 03:05:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:05:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:05:22,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:05:22,195 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 03:05:22,257 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 03:05:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:05:22,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:05:22,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:05:22,953 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 03:05:22,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:05:22,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569748863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:05:22,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:05:22,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:05:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423370664] [2023-08-04 03:05:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:05:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:05:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:05:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:05:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:05:22,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 430 [2023-08-04 03:05:22,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:05:22,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:05:22,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 430 [2023-08-04 03:05:22,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:06:57,708 INFO L124 PetriNetUnfolderBase]: 1045421/1242392 cut-off events. [2023-08-04 03:06:57,708 INFO L125 PetriNetUnfolderBase]: For 115861/115861 co-relation queries the response was YES. [2023-08-04 03:07:02,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2518226 conditions, 1242392 events. 1045421/1242392 cut-off events. For 115861/115861 co-relation queries the response was YES. Maximal size of possible extension queue 24596. Compared 6686750 event pairs, 528586 based on Foata normal form. 0/785769 useless extension candidates. Maximal degree in co-relation 2518184. Up to 1213297 conditions per place. [2023-08-04 03:07:08,501 INFO L140 encePairwiseOnDemand]: 427/430 looper letters, 73 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 03:07:08,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 412 flow [2023-08-04 03:07:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-04 03:07:08,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2023-08-04 03:07:08,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-04 03:07:08,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-04 03:07:08,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:08,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-04 03:07:08,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:07:08,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:07:08,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:07:08,524 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 240 flow. Second operand 3 states and 639 transitions. [2023-08-04 03:07:08,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 412 flow [2023-08-04 03:07:09,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 398 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:07:09,007 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 238 flow [2023-08-04 03:07:09,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2023-08-04 03:07:09,008 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-08-04 03:07:09,008 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 238 flow [2023-08-04 03:07:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:07:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:09,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:07:09,214 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 03:07:09,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:07:09,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash -861066125, now seen corresponding path program 1 times [2023-08-04 03:07:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329227401] [2023-08-04 03:07:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:09,298 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 03:07:09,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:09,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329227401] [2023-08-04 03:07:09,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329227401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:09,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555722405] [2023-08-04 03:07:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:09,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:09,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:09,310 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 03:07:09,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process